ITE 8512
Speaker: WY
What’s the EC ?
n Embedded Controller comes form ACPI
structure
n Host is communicated EC by LPC
interface. The I/O port are 60/64 and 62/66
n EC integrated ps2 device, keyboard matrix,
battery charger, fan control, power
sequence, hot key function, backlight,
CPU thermal sensor, system power
consumption,etc.
System Structure
NB
SB
LPC
EC
PS/2 KB/MS
MATRIX
FAN Control
Charger
Flash ROM
Power
Sequence….
Keyboard Controller Overview
Host System
LPC/Firmware Hub
HIF
Scan Matrix
Keyboard
18 Scan Out (Column)
8 Scan In (Row)
S
c
a
n
ITE KBC
2
/
S
P
3 PS/2 Devices
I2C
SMBus
3 SMBus Devices
EC Feature
ITE EC
PS/2 KB/MS
MATRIX
ACPI
Power management
SMBus
UART / CIR
ADC/DAC
PWM
Share BIOS
KBS Monitor
EC Position
Share BIOS Architecture
Max : 16M
64K~16M Byte
BIOS ROM Zone
KBC ROM Zone
KBC ROM Zone
64K Byte
Full space 16M Byte
64K
0
Max :16M-64K Byte
BIOS&EC Code Position