Document
Preliminary
TTP229-BSF TonTouchTM
16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP229-BSF 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
Operating voltage:2.4V~5.5V
Built-in regulator Stand-by current
At 3V, and sleep mode slow sampling rate 8Hz:
=> 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 a 2-wires serial output interface, both can use for 8 and 16 direct input keys mode 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 80sec 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
APPLICATION
Wide consumer products Button key replacement
09’/12/22
Page 1 of 16
Ver : 1.1
BLOCK DIAGRAM
SENADJ0 TP0 TP1
TP2 TP3 SENADJ1 TP4
TP5 TP6 TP7
Sense Port and
Detecting Circuit
SLPSENA SLPSENB
Wake-up Detecing Control Circuit
TEST
Function Option Control Circuit
Regulator Circuit
Preliminary
Timing Counter and
Key Scanning and
Function Control Circuit
System Oscillator Circuit
System Power On Circuit
TTP229-BSF TonTouchTM
Output Buffer &
Sense Input
Circuit
SENADJ2 TP8
TP9 TP10 TP11 TP12
TP13 TP14 TP15 SENADJ3
Serial Output Buffer and Control Circuit
SDO SCL
PACKAGE CONFIGURATION
TP3 TP2
SENADJ0 TP1 TP0
TP15 TP14 SENADJ3 TP13 TP12 SDO SCL SLPSENB
1 28
2 27
3 26
4 5
TTP229-B
25 24
6 (SSOP-28) 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
SLPSENA VSS VDD TP4 TP5 SENADJ1 TP6 TP7 TEST TP8 TP9 SENADJ2 TP10 TP11
09’/12/22
Page 2 of 16
Ver : 1.1
Preliminary
TTP229-BSF TonTouchTM
PIN DESCRIPTION
Pin No. Pin Name Share Pin I/O Type
Pin Description
1 TP3 SKMS1 I/O Touch pad input pin(KEY-3)
Key action function option-1(Single-key/Multi-key)
Default is all single-key
2 TP2 KYSEL I/O Touch pad input pin(KEY-2)
Key number function option(8-keys/16-keys)
Default is 8-keys
3 NC
4 SENADJ0
I/O Touch pad TP0~3 sensitivity adjust common pin
5
TP1
SAHL
I/O 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)
6 TP0 OPDEN I/O Touch pad input pin(KEY-0)
Output type function option(CMOS/OD/OC for 8-keys)
Default is CMOS
7
TP15
TPQ7 I/O/OD Touch pad input pin(KEY-15)
8-keys direct output pin(TPQ7)
8
TP14
TPQ6 I/O/OD Touch pad input pin(KEY-14)
8-keys direct output pin(TPQ6)
9 SENADJ3
I/O Touch pad TP12~15 sensitivity adjust common pin
10
TP13
TPQ5 I/O/OD Touch pad input pin(KEY-13)
8-keys direct output pin(TPQ5)
11
TP12
TPQ4 I/O/OD Touch pad input pin(KEY-12)
8-keys direct output pin(TPQ4)
12 SDO
O Data pin for the 2-wires serial output, option active
Low/High by TP1
13 SCL
I Serial clock input pin for serial type
It can be set active Low/High by TP1
14 SLPSENB
I/O Sleep mode sensitivity adjustment pin for
group-B(TP8~15)
15
TP11
TPQ3 I/O/OD Touch pad input pin(KEY-11)
8-keys direct output pin(TPQ3)
16
TP10
TPQ2 I/O/OD Touch pad input pin(KEY-10)
8-keys direct output pin(TPQ2)
17 SENADJ2
I/O Touch pad TP8~11 sensitivity adjust common pin
18 TP9 TPQ1 I/O/OD Touch pad input pin(KEY-9)
8-keys direct output pin(TPQ1)
19 TP8 TPQ0 I/O/OD Touch pad input pin(KEY-8)
8-keys direct output pin(TPQ0)
20 TEST
I-PL Only for test
09’/12/22
Page 3 of 16
Ver : 1.1
Preliminary
TTP229-BSF TonTouchTM
Pin No. Pin Name Share Pin I/O Type
Pin Description
21 TP7 SKSRT I/O Touch pad input pin(KEY-7)
Maximum key-on time function option(Infinite/80sec)
Default is infinite
22 TP6 SLWPTM I/O Touch pad input pin(KEY-6)
Sleep mode sampling length function option(4.0/2.0mS)
Default is 4.0ms
23 SENADJ1
I/O Touch pad TP4~7 sensitivity adjust common pin
24 TP5 WPSCT I/O Touch pad input pin(KEY-5)
Sampling rate at sleep mode function option(8Hz/64Hz)
Default is 8Hz
25 TP4 SKMS0 I/O Touch pad input pin(KEY-4)
Key action function option-0(Single-key/Multi-key)
Default is all single-key
26 VDD
P Positive power suppl.