RTL8111H-CG 
RTL8111HS-CG 
 
 
 
 
 
 
 
 
INTEGRATED 10/100/1000M ETHERNET 
CONTROLLER FOR PCI EXPRESS APPLICATIONS 
DATASHEET 
(CONFIDENTIAL: Development Partners Only) 
Rev. 1.5 
22 February 2016 
Track ID: JATR-8275-15 
 
Realtek Semiconductor Corp. 
No. 2, Innovation Road II, Hsinchu Science Park, Hsinchu 300, Taiwan 
Tel.: +886-3-578-0211. Fax: +886-3-577-6047 
www.realtek.com 
 
 
RTL8111H/RTL8111HS 
Datasheet 
COPYRIGHT 
©2016 Realtek Semiconductor Corp. All rights reserved. No part of this document may be reproduced, 
transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any 
means without the written permission of Realtek Semiconductor Corp. 
DISCLAIMER 
Realtek provides this document ‘as is’, without warranty of any kind. Realtek may make improvements 
and/or changes in this document or in the product described in this document at any time. This document 
could include technical inaccuracies or typographical errors. 
TRADEMARKS 
Realtek is a trademark of Realtek Semiconductor Corporation. Other names mentioned in this document 
are trademarks/registered trademarks of their respective owners. 
LICENSE 
This  product  is  covered  by  one  or  more  of  the  following  patents:  US5,307,459,  US5,434,872, 
US5,732,094, US6,570,884, US6,115,776, and US6,327,625. 
USING THIS DOCUMENT 
This  document  is  intended  for  the  software  engineer’s  reference  and  provides  detailed  programming 
information. 
Though every effort has been made to ensure that this document is current and accurate, more information 
may have become available subsequent to the production of this guide. 
REVISION HISTORY 
Revision 
1.0 
1.1 
1.2 
1.3 
1.4 
1.5 
 
Release Date 
2014/01/21 
2014/04/17 
2014/08/20 
2015/04/17 
2016/01/08 
2016/02/22 
Summary 
First release. 
Revised Table 20 Electrostatic Discharge Performance, page 24. 
Revised Table 22 Oscillator Requirements, page 25. 
Revised Table 24 DC Characteristics, page 26. 
Added a new signal type code, type Ic, for 1.8V/3.3V compatible input, in section 6 
Pin Descriptions, page 7. 
Revised Minimum High Level Input Voltage for Ic Pinout, Table 24 DC 
Characteristics, page 26. 
Added notes 3 and 4 to Table 29 Auxiliary Signal Timing Parameters, page 33. 
Revised section 10.1 Power Sequence Parameters, page 23. 
Revised section 10.1 Power Sequence Parameters, page 23. 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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Track ID: JATR-8275-15      Rev. 1.5
 
Table of Contents 
RTL8111H/RTL8111HS 
Datasheet 
6. 
7. 
5.1. 
5.2. 
5.3. 
5.4. 
6.1. 
6.2. 
6.3. 
6.4. 
6.5. 
6.6. 
6.7. 
6.8. 
1.  GENERAL DESCRIPTION..............................................................................................................................................1 
FEATURES.........................................................................................................................................................................3 
2. 
SYSTEM APPLICATIONS...............................................................................................................................................3 
3. 
4. 
FUNCTION BLOCK DIAGRAM.....................................................................................................................................4 
PIN ASSIGNMENTS .........................................................................................................................................................5 
5. 
RTL8111H PIN ASSIGNMENTS ....................................................................................................................................5 
PACKAGE IDENTIFICATION...........................................................................................................................................5 
RTL8111HS PIN ASSIGNMENTS ..................................................................................................................................6 
PACKAGE IDENTIFICATION...........................................................................................................................................6 
PIN DESCRIPTIONS.........................................................................................................................................................7 
POWER MANAGEMENT/ISOLATION ..............................................................................................................................7 
PCI EXPRESS INTERFACE .............................................................................................................................................7 
TRANSCEIVER INTERFACE............................................................................................................................................8 
CLOCK .........................................................................................................................................................................8 
REGULATOR AND REFERENCE......................................................................................................................................8 
LEDS ...........................................................................................................................................................................9 
POWER AND GROUND ..................................................................................................................................................9 
GPO PIN ......................................................................................................................................................................9 
FUNCTIONAL DESCRIPTION.....................................................................................................................................10 
PCI EXPRESS BUS INTERFACE....................................................................................................................................10 
7.1.1.  PCI Express Transmitter ......................................................................................................................................10 
7.1.2.  PCI Express Receiver...........................................................................................................................................10 
CUSTOMIZABLE LED CONFIGURATION......................................................................................................................11 
7.2.1.  LED Blinking Frequency Control.........................................................................................................................13 
PHY TRANSCEIVER ...................................................................................................................................................14 
7.3.1.  PHY Transmitter...................................................................................................................................................14 
7.3.2.  PHY Receiver .......................................................................................................................................................14 
7.3.3.  Link Down Power Saving Mode ...........................................................................................................................15 
7.3.4.  Next Page .............................................................................................................................................................15 
POWER MANAGEMENT...............................................................................................................................................15 
RECEIVE-SIDE SCALING (RSS) ..................................................................................................................................17 
7.5.1.  Receive-Side Scaling (RSS) Initialization.............................................................................................................17 
7.5.2.  Protocol Offload...................................................................................................................................................18 
7.5.3.  RSS Operation ......................................................................................................................................................18 
ENERGY EFFICIENT ETHERNET (EEE)........................................................................................................................18 
7.6. 
PHY DISABLE MODE .................................................................................................................................................19 
7.7. 
LATENCY TOLERANCE REPORTING (LTR) .................................................................................................................19 
7.8. 
7.9.  WAKE PACKET INDICATION (WPI) ............................................................................................................................19 
7.10. 
‘REALWOW!’ (WAKE-ON-WAN) TECHNOLOGY ......................................................................................................19 
7.11. 
L1.OFF AND L1.SNOOZE............................................................................................................................................20 
7.12.  GIGA LITE (500M).....................................................................................................................................................20 
7.13.  XTAL-LESS WAKE-ON-LAN....................................................................................................................................20 
LAN DISABLE MODE.................................................................................................................................................20 
7.14. 
SWITCHING REGULATOR (RTL8111HS ONLY) ....................................................................................................21 
LDO REGULATOR (RTL8111H ONLY)......................................................................................................................21 
8. 
9. 
7.1. 
7.2. 
7.3. 
7.4. 
7.5. 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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10.1. 
RTL8111H/RTL8111HS 
Datasheet 
POWER SEQUENCE..................................................................................................................................................22 
POWER SEQUENCE PARAMETERS...............................................................................................................................23 
CHARACTERISTICS.................................................................................................................................................24 
11.1.  ABSOLUTE MAXIMUM RATINGS ................................................................................................................................24 
11.2.  RECOMMENDED OPERATING CONDITIONS .................................................................................................................24 
11.3. 
ELECTROSTATIC DISCHARGE PERFORMANCE ............................................................................................................24 
11.4.  CRYSTAL REQUIREMENTS..........................................................................................................................................25 
11.5.  OSCILLATOR REQUIREMENTS ....................................................................................................................................25 
11.6. 
ENVIRONMENTAL CHARACTERISTICS ........................................................................................................................25 
11.7.  DC CHARACTERISTICS...............................................................................................................................................26 
11.8.  REFLOW PROFILE RECOMMENDATIONS .....................................................................................................................27 
11.9. 
PCI EXPRESS BUS PARAMETERS................................................................................................................................28 
Differential Transmitter Parameters ...............................................................................................................28 
Differential Receiver Parameters ....................................................................................................................29 
REFCLK Parameters.......................................................................................................................................29 
Auxiliary Signal Timing Parameters ...............................................................................................................33 
MECHANICAL DIMENSIONS.................................................................................................................................34 
ORDERING INFORMATION...................................................................................................................................35 
11.9.1. 
11.9.2. 
11.9.3. 
11.9.4. 
10. 
11. 
12. 
13. 
 
 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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Track ID: JATR-8275-15      Rev. 1.5
RTL8111H/RTL8111HS 
Datasheet 
 
List of Tables 
TABLE 1.     POWER MANAGEMENT/ISOLATION ...............................................................................................................................7 
TABLE 2.     PCI EXPRESS INTERFACE..............................................................................................................................................7 
TABLE 3.     TRANSCEIVER INTERFACE ............................................................................................................................................8 
TABLE 4.     CLOCK ..........................................................................................................................................................................8 
TABLE 5.     REGULATOR AND REFERENCE ......................................................................................................................................8 
TABLE 6.     LEDS............................................................................................................................................................................9 
TABLE 7.     POWER AND GROUND ...................................................................................................................................................9 
TABLE 8.     GPO PIN .......................................................................................................................................................................9 
TABLE 9.     LED SELECT (IO REGISTER OFFSET 18H~19H) ..........................................................................................................11 
TABLE 10.   CUSTOMIZED LEDS ...................................................................................................................................................11 
TABLE 11.   FIXED LED MODE .....................................................................................................................................................11 
TABLE 12.   LED FEATURE CONTROL-1........................................................................................................................................12 
TABLE 13.   LED FEATURE CONTROL-2........................................................................................................................................12 
TABLE 14.   LED OPTION 1 & OPTION 2 SETTINGS .......................................................................................................................12 
TABLE 15.   LED BLINKING FREQUENCY CONTROL (IO OFFSET 1AH) .........................................................................................13 
TABLE 16.   L1.OFF AND L1.SNOOZE PCIE PORT CIRCUIT ON/OFF ..............................................................................................20 
TABLE 17.   POWER SEQUENCE PARAMETERS ...............................................................................................................................22 
TABLE 18.   ABSOLUTE MAXIMUM RATINGS ................................................................................................................................24 
TABLE 19.   RECOMMENDED OPERATING CONDITIONS .................................................................................................................24 
TABLE 20.   ELECTROSTATIC DISCHARGE PERFORMANCE ............................................................................................................24 
TABLE 21.   CRYSTAL REQUIREMENTS..........................................................................................................................................25 
TABLE 22.   OSCILLATOR REQUIREMENTS ....................................................................................................................................25 
TABLE 23.   ENVIRONMENTAL CHARACTERISTICS ........................................................................................................................25 
TABLE 24.   DC CHARACTERISTICS...............................................................................................................................................26 
TABLE 25.   REFLOW PROFILE RECOMMENDATIONS .....................................................................................................................27 
TABLE 26.   DIFFERENTIAL TRANSMITTER PARAMETERS..............................................................................................................28 
TABLE 27.   DIFFERENTIAL RECEIVER PARAMETERS.....................................................................................................................29 
TABLE 28.   REFCLK PARAMETERS .............................................................................................................................................29 
TABLE 29.   AUXILIARY SIGNAL TIMING PARAMETERS.................................................................................................................33 
TABLE 30.   ORDERING INFORMATION ..........................................................................................................................................35 
 
 
List of Figures 
FIGURE 1.     FUNCTION BLOCK DIAGRAM .......................................................................................................................................4 
FIGURE 2.     RTL8111H PIN ASSIGNMENTS....................................................................................................................................5 
FIGURE 3.     RTL8111HS PIN ASSIGNMENTS..................................................................................................................................6 
FIGURE 4.     LED BLINKING FREQUENCY EXAMPLE .....................................................................................................................13 
FIGURE 5.     POWER SEQUENCE.....................................................................................................................................................22 
FIGURE 6.     SINGLE-ENDED MEASUREMENT POINTS FOR ABSOLUTE CROSS POINT AND SWING..................................................31 
FIGURE 7.     SINGLE-ENDED MEASUREMENT POINTS FOR DELTA CROSS POINT ...........................................................................31 
FIGURE 8.     SINGLE-ENDED MEASUREMENT POINTS FOR RISE AND FALL TIME MATCHING ........................................................31 
FIGURE 9.     DIFFERENTIAL MEASUREMENT POINTS FOR DUTY CYCLE AND PERIOD....................................................................32 
FIGURE 10.   DIFFERENTIAL MEASUREMENT POINTS FOR RISE AND FALL TIME ...........................................................................32 
FIGURE 11.   DIFFERENTIAL MEASUREMENT POINTS FOR RINGBACK............................................................................................32 
FIGURE 12.   REFERENCE CLOCK SYSTEM MEASUREMENT POINT AND LOADING .........................................................................33 
FIGURE 13.   AUXILIARY SIGNAL TIMING......................................................................................................................................33 
 
 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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RTL8111H/RTL8111HS 
Datasheet 
1.  General Description 
The Realtek RTL8111H-CG/RTL8111HS-CG 10/100/1000M Ethernet controller combines a triple-speed 
IEEE  802.3  compliant  Media  Access  Controller  (MAC)  with  a  triple-speed  Ethernet  transceiver,  PCI 
Express bus controller, and embedded memory. With state-of-the-art DSP technology and mixed-mode 
signal technology, the RTL8111H/RTL8111HS offers high-speed transmission over CAT 5 UTP cable or 
CAT 3 UTP (10Mbps only) cable. Functions such as Crossover Detection and Auto-Correction, polarity 
correction,  adaptive  equalization,  cross-talk  cancellation,  echo  cancellation,  timing  recovery,  and  error 
correction are implemented to provide robust transmission and reception capability at high speeds. 
 
The RTL8111H/RTL8111HS supports the PCI Express 1.1 bus interface for host communications with 
power management, and complies with the IEEE 802.3u specification for 10/100Mbps Ethernet and the 
IEEE 802.3ab specification for 1000Mbps Ethernet. It supports an auxiliary power auto-detect function, 
and will auto-configure related bits of the PCI power management registers in PCI configuration space. 
The  RTL8111H/RTL8111HS  features  embedded  One-Time-Programmable  (OTP)  memory.  The 
RTL8111H  provides  a  built-in  LDO  regulator,  and  the  RTL8111HS  provides  a  built-in  switching 
regulator. 
 
Advanced  Configuration  Power  management  Interface  (ACPI)—power  management  for  modern 
operating  systems  that  are  capable  of  Operating  System-directed  Power  Management  (OSPM)—is 
supported  to  achieve  the  most  efficient  power  management  possible.  PCI  MSI  (Message  Signaled 
Interrupt) and MSI-X are also supported. 
 
In addition to the ACPI feature, remote wake-up (including AMD Magic Packet and Microsoft Wake-Up 
Frame) is supported in both ACPI and APM (Advanced Power Management) environments. To support 
WOL from a deep power down state (e.g., D3cold, i.e., main power is off and only auxiliary exists), the 
auxiliary  power  source  must  be  able  to  provide  the  needed  power  for  the  RTL8111H/RTL8111HS.  To 
further  reduce  power  consumption,  the  RTL8111H/RTL8111HS  also  supports  PCIe  L1.Off  and 
L1.Snooze. 
 
The RTL8111H/RTL8111HS supports ‘RealWoW!’ technology that enables remote wake-up of a sleeping 
PC  through  the  Internet.  This  feature  allows  PCs  to  reduce  power  consumption  by  remaining  in  low 
power sleeping state until needed. 
Note: The ‘RealWoW!’ service requires registration on first time use. 
 
The RTL8111H/RTL8111HS supports Protocol offload. It offloads some of the most common protocols to 
NIC  hardware  in  order  to  prevent  spurious  wake-up  and  further  reduce  power  consumption.  The 
RTL8111H/RTL8111HS can offload ARP (IPv4) and NS (IPv6) protocols while in the D3 power saving 
state. 
 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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Track ID: JATR-8275-15      Rev. 1.5
 
RTL8111H/RTL8111HS 
Datasheet 
The RTL8111H/RTL8111HS supports the ECMA (European Computer Manufacturers Association) proxy 
for sleeping hosts standard. The standard specifies maintenance of network connectivity and presence via 
proxies in order to extend the sleep duration of higher-powered hosts. It handles some network tasks on 
behalf of the host, allowing the host to remain in sleep mode for longer periods. Required and optional 
behavior of an operating proxy includes generating reply packets, ignoring packets, and waking the host. 
 
The  RTL8111H/RTL8111HS  supports  IEEE  802.3az-2010,  also  known  as  Energy  Efficient  Ethernet 
(EEE).  IEEE  802.3az-2010  operates  with  the  IEEE  802.3  Media  Access  Control  (MAC)  sublayer  to 
support operation in Low Power Idle mode. When the Ethernet network is in low link utilization, EEE 
allows systems on both sides of the link to save power. 
 
The RTL8111H/RTL8111HS is fully compliant with Microsoft NDIS5, NDIS6 (IPv4, IPv6, TCP, UDP) 
Checksum and Segmentation Task-offload (Large send and Giant send) features, and supports IEEE 802 
IP Layer 2 priority encoding and IEEE 802.1Q Virtual bridged Local Area Network (VLAN). The above 
features contribute to lowering CPU utilization, especially benefiting performance when in operation on a 
network server. 
 
The  RTL8111H/RTL8111HS  supports  Receive-Side  Scaling  (RSS)  to  hash  incoming  TCP  connections 
and  load-balance  received  data  processing  across  multiple  CPUs.  RSS  improves  the  number  of 
transactions per second and number of connections per second, for increased network throughput. 
 
The  device  features  inter-connect  PCI  Express  technology.  PCI  Express  is  a  high-bandwidth, 
low-pin-count, serial, interconnect technology that offers significant improvements in performance over 
conventional PCI and also maintains software compatibility with existing PCI infrastructure. 
 
The RTL8111H/RTL8111HS is suitable for multiple market segments and emerging applications, such as 
desktop, mobile, workstation, server, communications platforms, and embedded applications. 
 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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RTL8111H/RTL8111HS 
Datasheet 
Features 
Integrated 10/100/1000M transceiver 
2. 
Hardware 
 
  Supports Giga Lite (500M) mode 
  Auto-Negotiation with Next Page capability 
  Supports PCI Express 1.1 
  Supports pair swap/polarity/skew correction 
  Crossover Detection & Auto-Correction 
  Supports 1-Lane 2.5Gbps PCI Express Bus 
  Embedded OTP memory 
  Supports hardware ECC (Error Correction 
Code) function 
  Supports hardware CRC (Cyclic 
Redundancy Check) function 
  Transmit/Receive on-chip buffer support 
  Supports PCI MSI (Message Signaled 
Interrupt) and MSI-X 
  Supports 25MHz or 48MHz Oscillator 
  Built-in switching (RTL8111HS) and LDO 
(RTL8111H) regulator   
  Supports power down/link down power 
saving/PHY disable mode 
  Customized LEDs 
  Controllable LED Blinking Frequency and 
Duty Cycle 
  LAN disable with GPIO pin 
  Supports LTR (Latency Tolerance 
Reporting) 
  Wake-On-LAN and ‘RealWoW!’ 
Technology (remote wake-up) support 
  Supports 32-set 128-byte Wake-Up Frame 
pattern exact matching 
  Supports Microsoft WPI (Wake Packet 
Indication) 
  Supports PCIe L1.Off and L1.Snooze 
IEEE 
  Fully compliant with IEEE 802.3, 
IEEE 802.3u, IEEE 802.3ab 
  Supports IEEE 802.1P Layer 2 Priority 
Encoding 
  Supports IEEE 802.1Q VLAN tagging 
  Supports IEEE 802.3az-2010 (EEE) 
  Supports Full Duplex flow control 
(IEEE 802.3x) 
Software Offload 
  Microsoft NDIS5, NDIS6 Checksum 
Offload (IPv4, IPv6, TCP, UDP) and 
Segmentation Task-offload (Large send v1 
and Large send v2) support 
  Supports jumbo frame to 9K bytes 
  Supports quad core Receive-Side Scaling 
(RSS) 
  Supports Protocol Offload (ARP & NS) 
  32-pin QFN ‘Green’ package 
  Supports EMAC-393 ECMA ProxZzzy 
Standard for sleeping hosts 
  XTAL-Less Wake-On-LAN 
 
3. 
  PCI Express 10/100/1000M Ethernet on Motherboard, Notebook, or Embedded systems 
System Applications 
Integrated 10/100/1000M Ethernet Controller for PCI Express 
 
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Track ID: JATR-8275-15      Rev. 1.5