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IC BLOCK DIAGRAMS AND DESCRIPTIONS
TC9164AF(Function switch)
2
S1
S2
3
S3
4
5
S4
6
COM1
S5
7
8
S6
9
COM2
10
10
S7
11
11
S8
12
12
COM3
13
13
ST
Pin No.
1
14
28
2,3,4,6,7,8,10,11
27,26,25,23,22,21,19,18
5,9,12
24,20,17
13
15
16
VSS
GND
VDD
1
14
14
28
28
SHIFT REGISTER
Symbol
Function
Vss
Negative power supply
GND
Ground
Positive power supply
VDD
Input/output terminals
S1~S8
S1~S8
Input/output terminals
Common terminals
COM1 ~ COM3
COM1 ~ COM3
Common terminals
ST
Strobe input terminal for data reading
Clock input terminal for data transfer
C K
DAT A
Data input terminal for switch
TX-SR55
S1
27
27
S2
26
26
S3
25
25
S4
24
24
COM1
23
23
S5
22
22
S6
21
21
COM2
20
20
S7
19
19
S8
18
18
17
17
COM3
16
16
DATA
CK
15
15
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