Citizen PHU Series Specifications page 17

(3) The functions of the FFC terminals pins
<FFC A>
Terminal
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal name
STRB 3
STRB 2
STRB 2
STRB 2
STRB 1
STRB 1
STRB 1
V cc
TH
GND
CP
DO
PR For identification of heating element resistance
GND
GND
GND
GND
COM
COM
COM
13
PRU·PMU·PHU SERIES SPECIFICATIONS
Function
Strobe 3
Strobe 2
Strobe 2
Strobe 2
Strobe 1
Strobe 1
Strobe 1
Thermal head driver power supply
Thermistor
GND
Clock signal for data transfer
Print data serial output
GND
GND
GND
GND
Thermal head common
Thermal head common
Thermal head common