TTP224B Datasheet, PDF (6/11 Pages) Tontek Design Technology – 4 keys Touch Pad Detector IC

TTP224B
Ⅱ. Output mode（By TOG、OD、AHLB pad option）
The TTP224B outputs（TPQ0~TPQ3）has direct mode active high or low by AHLB pad option,
has toggle mode by TOG pad option and has open drain(have diode protective circuit) mode by
OD pad option
TOG
0
OD AHLB
Pad TPQ0 ～ TPQ3 option features
1
0
Direct mode, CMOS output active high
Remark
Default
0
1
1
Direct mode, CMOS output active low
0
0
0
Direct mode, Open drain output active high
0
0
1
Direct mode, Open drain output active low
1
1
0
Toggle mode, CMOS output, Power on state=0
1
1
1
Toggle mode, CMOS output, Power on state=1
1
0
0
Toggle mode, Power on state high-Z, Active high
1
0
1
Toggle mode, Power on state high-Z, Active low
Ⅲ. Key operating mode（By SM pad option）
The TTP224B has the Single-key and Multi-key functions by SM pad option
SM
Option features
Remark
1
Multi-key mode
Default
0
Single key mode
Multi-key mode：The TP0-TP3 can be detected 2 keys or above 2 keys at the same time
Single-key mode：The TP0-TP3 can be detected 1 key only at the same time, when any key be
detected, the other 3 keys can not be detected
15/06/16
Page 6 of 11
Version：1.1