Diagrams; Explanation Of Ic Terminals - Sony SRF-M55 Service Manual

4-1. EXPLANATION OF IC TERMINALS

IC301 µ PD17015GS-556-GJG (SYSTEM CONTROL, LCD DRIVE)
Pin No. Pin name
1 POB2
2 PCO0
3 PCO1
4 PCO2
5 PCO3
6 POD0/BEEP
7 POA0
8 POA1
9 POA2
10 POA3
11 CE
12 XOUT
13 XIN
14 VDD
15 GND
16 EO
17 VREG
18 VCOH
19 VCOL
20 – 28 LCD 0 – 8
29 – 32 COM 0 – 3
33 VLCD1
34 CAP1
35 CAP0
36 VLCD0
37 POB0
38 POB1
SECTION 4

DIAGRAMS

I/O
I Key return input.
O Key source output.
O Key source output.
I Power (AUTO OFF) key input.
I HOLD key input.
O Beep output.
I Key return input (Fixed at "L").
I Voltage decrease information input. E : On-and-off
O Power ON/OFF output.
O Mute signal output. "H" : Mute ON
Voltage decrease information input. E : Lighting
I
O System clock output (75 kHz).
I System clock input (75 kHz).
— Power supply.
— Ground.
O PLL error output.
O Voltage regulator output.
I FM VCO input.
— Not used (OPEN).
O LCD segment output.
O LCD common output.
— Power supply for LCD drive.
— Connecting pins of the capacitor for LCD drive voltage.
— Power supply for LCD drive.
I Key return input.
– 6 –
Description
"H" : ON