Panasonic KX-T7565AL, Service Manual

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5.2. IC2
Classification Terminal Pin No. Input/Output Function
Power supply Vcc 7 - Power supply terminal
GND 3 - Ground terminal
CVcc 64 - Connect to the Vcc terminal
Vtref 61 - DTMF reference level voltage terminal
Connect to the Vcc terminal
Oscillation X1 1 Input Input/Output terminal to the main oscillator.
X2 2 Output Connect to the ceramic oscillator.(8MHz)
OSC1 5 Input No use
OSC2 4 Output No use
Reset RESET 8 Input Reset terminal of MCU (Active Low)
Test TEST 6 Input No use
I/O port P20 9 Output DTMF tone control
P24 13 Output Handset tone control
P25 14 Output SP-Phone tone control
P26 15 Output Ringer tone control
P27 16 Input Hook Switch
SCK1 10 Output LCD serial clock
P22 11 Output LCD write enable command
SO1 12 Output LCD data
P17 17 Input Interrupt request from G/A (IC1)
P16 18 Input Interrupt request from G/A (IC1)
P15 19 Output Reset terminal of G/A (IC1) (Active Hi)
P14 20 Output KEY communication output 1
P13 21 Output KEY communication output 2
P12 22 Output KEY communication output 3
P11 23 Output KEY communication output 4
P10 24 Output KEY communication output 5
P50 28 Input KEY communication input 0
P51 29 Input KEY communication input 1
P52 30 Input KEY communication input 2
P53 31 Input KEY communication input 3
P54 32 Input KEY communication input 4
P55 33 Input KEY communication input 5
P56 34 Input KEY communication (HOLD key)
P57 35 Input No use
PA3 25 Output W.OHCA control
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KX-T7565AL / KX-T7565AL-B