TOUCH_IC_TTP229(TOUCH_IC_TTP229).pdf-资料库

Preliminary TTP229 TonTouchTM 16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC GENERAL DESCRIPTION The TTP229 TonTouchTM IC is capacitive sensing design specifically for touch pad controls. The device built in regulator for touch sensor. Stable sensing method can cover diversity conditions. Human interfaces control panel links through non-conductive dielectric material. The main application is focused at replacing of the mechanical switch or button. The ASSP can independently handle the 8 touch pads or up to 16 touch pads. FEATURES APPLICATION Wide consumer products Button key replacement 09’/10/30 Page 1 of 19 Ver : 1.0 Operating voltage：2.4V~5.5V for built-in regulator enable 2.0V~5.5V for built-in regulator disable Built-in regulator with external enable/disable option Stand-by current At 3V, and sleep mode slow sampling rate 8Hz： Internal regulator is enabled, the Stand-by current => Typical 2.5uA for 16 input keys => Typical 2.0uA for 8 input keys Internal regulator is disabled, the Stand-by current => Typical 2.5uA for 16 input keys => Typical 2.0uA for 8 input keys Provides to set 8 direct keys or 16 direct keys by option Provides to set 8 separate outputs only for 8 direct input keys mode Has two kinds of serial output interface, both can use for 8 and 16 direct input keys mode Include 2-wires serial interface and I2C-bus slave interface, they are selected by option 8 separate outputs can select output driving types by option (CMOS/OD/OC with active high/low) 2-wires serial interface can select active high or low by option Offer multi-key or single-key feature by option Provides two kinds of sampling rate that slow sampling rate 8Hz and fast sampling rate 64Hz at sleep mode Have the maximum key-on time about 60sec by pin option Sensitivity can adjust by the capacitance(1~50pF) outside After power-on have about 0.5sec stable-time, During the time do not touch the key pad, and all functions are disabled Auto calibration for environment changing And the re-calibration period is about 4.0sec, when all keys are not activated for fixed time

BLOCK DIAGRAM Preliminary TTP229 TonTouchTM SENADJ0 TP0 TP1 TP2 TP3 SENADJ1 TP4 TP5 TP6 TP7 SLPSENA SLPSENB A0 A1 A2 SLSERT ENSLP REGEN TEST VREG Sense Port and Detecting Circuit Timing Counter and and Key Scanning Function Control Circuit Output Buffer & Sense Input Circuit SENADJ2 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15 SENADJ3 Wake-up Detecing Control Circuit Function Option Control Circuit System Oscillator Circuit Serial Output Buffer and Control Circuit SDO SCL I2C-bus interface Control Circuit SDA Regulator Circuit System Power On Circuit PACKAGE CONFIGURATION TTP229 SSOP-48 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 REGEN VSS ENSLP VREG VDD TP4 TP5 SENADJ1 TP6 TP7 SLSERT A0 A1 A2 SLPSENA TP3 TP2 SENADJ0 TP1 TP0 TP15 TP14 SENADJ3 TP13 TP12 SDA SDO SCL SLPSENB TP11 TEST TP8 TP9 SENADJ2 TP10 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 09’/10/30 Page 2 of 19 Ver : 1.0

Preliminary PAD DESCRIPTION Pad No. Pad Name Share Pin I/O Type TTP229 TonTouchTM Pad Description TP15 TP14 TPQ7 TPQ6 SENADJ3 I/O/OD Touch pad input pin(KEY-15) 8-keys direct output pin(TPQ7) I/O/OD Touch pad input pin(KEY-14) 8-keys direct output pin(TPQ6) Touch pad TP12~15 sensitivity adjust common pin I/O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 TP13 TP12 SDA SDO SCL SLPSENB TPQ5 TPQ4 TP11 TP10 TPQ3 TPQ2 SENADJ2 TP9 TP8 TEST A2 A1 A0 SLSERT TPQ1 TPQ0 TP7 SKSRT I/O I/O/OD Touch pad input pin(KEY-13) 8-keys direct output pin(TPQ5) I/O/OD Touch pad input pin(KEY-12) 8-keys direct output pin(TPQ4) I/OD Data pin for the I2C-bus serial data interface O Data pin for the 2-wires serial output, option active Low/High by TP1 Serial clock input pin for serial type At 2-wires serial type can be set active Low/High by TP1 Sleep mode sensitivity adjustment pin for group-B(TP8~15) I I/O I/O/OD Touch pad input pin(KEY-11) 8-keys direct output pin(TPQ3) I/O/OD Touch pad input pin(KEY-10) 8-keys direct output pin(TPQ2) Touch pad TP8~11 sensitivity adjust common pin I/O I/O/OD Touch pad input pin(KEY-9) 8-keys direct output pin(TPQ1) I/O/OD Touch pad input pin(KEY-8) 8-keys direct output pin(TPQ0) I-PL Only for test I-PH A2~0 are input pins for the I2C-bus device address I-PH A2~0 are input pins for the I2C-bus device address I-PH A2~0 are input pins for the I2C-bus device address selection selection selection I-PH The option pin for serial output type selection Default is 2-wires serial type Touch pad input pin(KEY-7) Maximum key-on time function option(Infinite/60sec) Default is infinite 09’/10/30 Page 3 of 19 Ver : 1.0

Pad No. Pad Name Share Pin I/O Type Pad Description Preliminary TTP229 TonTouchTM 21 22 23 24 25 26 27 28 29 30 31 32 33 34 TP6 SLWPTM I/O SENADJ1 TP5 WPSCT I/O I/O TP4 SKMS0 I/O VDD VREG ENSLP VSS REGEN SLPSENA TP3 SKMS1 P P P I-PH I/O I/O TP2 KYSEL I/O SENADJ0 TP1 SAHL I/O I/O I-PH Sleep mode enable/disable function option Touch pad input pin(KEY-6) Sleep mode sampling length function option(4.0/2.0mS) Default is 4.0ms Touch pad TP4~7 sensitivity adjust common pin Touch pad input pin(KEY-5) Sampling rate at sleep mode function option(8Hz/64Hz) Default is 8Hz Touch pad input pin(KEY-4) Key action function option-0(Single-key/Multi-key) Default is all single-key Positive power supply Internal regulator output pin Default is enable Negative power supply, ground Internal regulator enable/disable function option Default is enable Sleep mode sensitivity adjustment pin for group-A(TP0~7) Touch pad input pin(KEY-3) Key action function option-1(Single-key/Multi-key) Default is all single-key Touch pad input pin(KEY-2) Key number function option(8-keys/16-keys) Default is 8-keys Touch pad TP0~3 sensitivity adjust common pin Touch pad input pin(KEY-1) Output type function option(Active High/Low) Default is active-high for TPQ0~7, active-low for 2-wires serial type(SCL and SDO) Touch pad input pin(KEY-0) Output type function option(CMOS/OD/OC for 8-keys) Default is CMOS 35 TP0 OPDEN I/O Note：Pin Type I ＝＞CMOS input only I-PH ＝＞CMOS input and pull-high resister I-PL ＝＞CMOS input and pull-low resister O ＝＞CMOS push-pull output I/O ＝＞CMOS I/O P ＝＞Power / Ground OD ＝＞CMOS open drain output (For OD TPQ0~TPQ7 pins have Diode protective circuit, SDA pin has no Diode protective circuit) 09’/10/30 Page 4 of 19 Ver : 1.0

Preliminary TTP229 TonTouchTM PAD’s DIAGRAM CHIP SIZE：1700um x 1820um Substrate floating (recommend) or VSS PAD’s COORDINATE Pad NO. Pad Name X X Pad NO. Pad Name 750.00 SLSERT 750.00 TP7 750.00 TP6 750.00 SENADJ1 750.00 TP5 750.00 TP4 675.85 VDD 558.85 VREG 421.15 ENSLP 304.15 VSS REGEN 187.15 SLPSENA -460.85 TP3 -577.85 -750.00 TP2 -750.00 SENADJ0 TP1 -750.00 -750.00 TP0 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Y -335.35 -218.35 -101.35 15.65 438.60 555.60 810.00 810.00 810.00 810.00 810.00 810.00 810.00 591.15 467.15 343.15 219.15 Y 95.15 -28.85 -369.50 -493.50 -617.50 -810.00 -810.00 -810.00 -810.00 -810.00 -810.00 -810.00 -810.00 -810.00 -810.00 -686.35 -569.35 -452.35 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 TP15 TP14 SENADJ3 TP13 TP12 SDA SDO SCL SLPSENB TP11 TP10 SENADJ2 TP9 TP8 TEST A2 A1 A0 -750.00 -750.00 -750.00 -750.00 -750.00 -539.90 -424.90 -309.90 -194.90 -79.90 35.10 150.10 265.10 380.10 495.10 750.00 750.00 750.00 09’/10/30 Page 5 of 19 Ver : 1.0

Preliminary ELECTRICAL CHARACTERISTICS ‧Absolute Maximum Ratings TTP229 TonTouchTM Parameter Operating Temperature Storage Temperature Power Supply Voltage Input Voltage Human Body Mode Note：VSS symbolizes for system ground Symbol TOP TSTG VDD VIN ESD Conditions ─ ─ Ta=25°C Ta=25°C ─ Value -40 ~ +85 -50 ~ +125 VSS-0.3 ~ VSS+6.0 VSS-0.3 to VDD+0.3 6 Unit ℃ ℃ V V KV ‧DC/AC Characteristics：(Test condition at room temperature=25℃) uA Min. Typ. Max. Unit V 2.0 2.4 V V 2.2 uA 0 0.8 - - 5.5 5.5 2.4 0.2 VDD 1.0 VDD - mA mA - mS mS mS mS ohm - - 2.3 20 25 2.0 2.0 2.5 2.5 - - 8 -4 125 15.6 32 16 30K Symbol VDD VDD VREG Test Condition Internal Regulator disable Internal Regulator enable VDD =3.0V 8-Keys 16-Keys Regulator enable Regulator disable Regulator enable Regulator disable Regulator enable Regulator disable Input Low Voltage Input High Voltage VDD=3V, VOL=0.6V VDD=3V, VOH=2.4V VDD=3V, Sampling rate 8Hz VDD=3V, Sampling rate 64Hz VDD=3V, set 16-keys VDD=3V, set 8-keys RPH VDD=3V, Parameter Operating Voltage Operating Voltage Internal Regulator Output Operating Current (no load) Stand-by Current (VDD=3.0V) Input Ports Input Ports Output Port Sink Current Output Port Source Current Wake-up Response Time (at sleep mode) Output Response Time (at operation) Input Pin Pull-high Resistor (REGEN, SLSERT, ENSLP, A0~A2) Input Pin Pull-low Resistor (TEST) IOP ISD VIL VIH IOL IOH TWU TR RPL VDD=3V, 30K ohm 09’/10/30 Page 6 of 19 Ver : 1.0

Preliminary TTP229 TonTouchTM FUNCTION DESCRIPTION 1. Sensitivity adjustment The total loading of electrode size and capacitance of connecting line on PCB can affect the sensitivity. So the sensitivity adjustment must according to the practical application on PCB. The TTP229 offers some methods for adjusting the sensitivity outside. 1-1 by the electrode size Under other conditions are fixed. Using a larger electrode size can increase sensitivity. Otherwise it can decrease sensitivity. But the electrode size must use in the effective scope. 1-2 by the panel thickness Under other conditions are fixed. Using a thinner panel can increase sensitivity. Otherwise it can decrease sensitivity. But the panel thickness must be below the maximum value. 1-3 by the value of external capacitor (please see the down Figure 1-3-1) Under other conditions are fixed. When adding the values of CJ0~CJ3 and CJWA and CJWB will reduce sensitivity in the useful range (1pF≦CJ0~CJ3≦50pF, 1pF≦CJWA~CJWB≦50pF). When do not use any capacitor that means open on the position of capacitor, the sensitivity is most sensitive. The capacitors CJ0~CJ3 are used to adjust the sensitivity of keys at operation mode. The capacitors CJWA and CJWB are used to adjust the Wake-up sensitivity at sleep mode. About the relation of capacitor and controlled keys please to see below table. The capacitor CJ0 CJ1 CJ2 CJ3 CJWA CJWB Note：When using the value of capacitor to adjust the sensitivity, recommending to adjust the CJ0~CJ3 capacitor for K0~K15 first, then adjusting the CJWA and CJWB capacitor for Wake-up sensitivity. K0 The keys-group controlled and adjusted K0~K3 group K4~K7 group K8~K11 group K12~K15 group K0~K7 group K8~K15 group K8 K1 K2 K3 K4 K5 K6 K7 ELECTRODE CJ0 CJ2 VDD SENADJ0 TP0 TP1 TP2 TP3 SENADJ1 TP4 TP5 TP6 TP7 SLPSENA ENSLP TEST REGEN SLSERT VREG SENADJ2 TP8 TP9 TP10 TP11 SENADJ3 TP12 TP13 TP14 TP15 SLPSENB SDO SDA SCL A2 A1 A0 VSS CJ1 CJWA Figure 1-3-1 CJ3 K9 K10 K11 K12 K13 K14 K15 CJWB 09’/10/30 Page 7 of 19 Ver : 1.0

Preliminary TTP229 TonTouchTM 2. Input keys number select 3. Output mode The TTP229 has 8 keys input mode and 16 keys input mode. These modes are selected via high-value resistor connected to the TP2(KYSEL) pin to VSS, or not. The default that TP2(KYSEL) pin is not used resistor connected to VSS is selected 8 keys input mode. Another is selected 16 keys input mode that has used a high-value resistor connected to VSS. The TTP229 has 8 pins direct output mode and two kinds of serial output interface mode. The output of 16 keys input mode only offer serial output interface. The 8 keys input mode has two kinds of output that 8 pins direct output and serial output interface. The 8 pins direct output only use at 8 keys input mode. The two kinds of serial output interface mode include I2C-bus slave interface and 2-wires serial interface. The two modes use common clock input pin that is SCL pin. At the same time only one mode can work. They are selected by the SLSERT pin. The default that the SLSERT pin is floating or connected to VDD is set 2-wires serial interface. When the SLSERT pin is connected to VSS, it is set I2C-bus slave interface. 3-1 At the 8 pins direct output mode, the TTP229 has two kinds of output type that they are CMOS type output and OD (Open Drain) type output. These are selected by the TP0(OPDEN) pin. The CMOS type output is default that the TP0(OPDEN) pin is not used any component to VSS. When the TP0(OPDEN) pin is used a high-value resistor connected to VSS, it is selected OD type output. 3-2 When selecting 8 pins direct CMOS output mode, the output channels can be set active-high or active-low by TP1(SAHL) pin. The default that the TP1(SAHL) pin is not used a high-value resistor, it is set active-high. When the TP1(SAHL) pin has a high-value resistor connected to VSS, it is set active-low. 3-3 At 8 pins direct OD output mode, it has OD (Open Drain) or OC (Open collector) output mode to be selected by the TP1(SAHL) pin. The TP1(SAHL) pin has a high-value resistor connected to VSS, it is selected OC mode. Another it is selected OD mode that does not has a resistor. The default is OD mode. The states of OD mode are floating and active-low. And the states of OC mode are floating and active-high. Note：the output pins have Diode protective circuit in the chip. So when it selected OD or OC mode. Do not propose to connect other device that uses the different voltage. That avoids to occurring the leakage current in the system. 3-4 The 2-wires serial output interface mode can be selected by the SLSERT pin that it has to be floated or connected to VDD. At the mode the SDO pin is data output pin, the SCL is clock input pin, both can be set active-high and active-low by TP1(SAHL) pin. The default is active-low that TP1(SAHL) pin is not used resistor connected to VSS. Another it is active-high that is used a high-value resistor connected to VSS. The 2-wires serial mode supports always polling data for other device on the system. Or other device can wait that TTP229 outputs the data valid (DV) signal by the SDO pin, and it can give the clock signal to TTP229 SCL pin and get the key data from SDO pin. The TTP229 2-wires serial interface supports a timeout mechanism for SCL pin. If the SCL pin has no signal edge change over 2ms, the 2-wires serial interface will reset itself and return to stand-by state. 09’/10/30 Page 8 of 19 Ver : 1.0

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