Ic Pin Description - Sony CFD-S22 Service Manual

3. IC PIN DESCRIPTION

• IC501 CXP83620-025Q/026Q (SYSTEM CONTROL)
Pin No. Pin Name
1 WRQ
2 RMC
3 MUTE
4 ADJ
5 FSEQ
6 C-CE
7 C-CL
8 C-DI
9 C-DO
10 C-SW
11 C-DRF
12 C-RES
13 C-MUTE
14 R-COUNT
15 R-CLOCK
16 R-DATA
17 R-LATCH
18 NC
19 V-DATA
20 V-CLOCK
21 P-CON
22 REG CHK
23 REC
24 SDA
25 – 28 KEY-1 – 4
29 MODE CHECK
30 RST
31 EXTAL
32 XTAL
33 VSS
34 VL
35 – 37 VLC3 – 1
38 – 41 COM0 – 3
42 – 58 SEG0 – 16
59 SEG17
60, 61 NC
62 INIT
63 TONE
64 MEGA BASS
65 BT-CHK
66 MT-CONT
67 ISS1
68 ISS2
69 TAPE
70 RADIO
71 CD
72 VDD
73 TX
74 TEX
I/O
I CD WRQ signal input
I Sircs receiver input
O MUTE output H: Mute
O F TEX frequency division output
I CD SENSE read clock input
O CD chip enable output
O CD clock output
O CD data output
I CD data input
I CD limit switch input
I CD DRF signal input
O CD system reset output
O CD MUTE output Not used. (Open)
I Tuner PLL data input
O Tuner PLL clock output
O Tuner PLL data output
O Tuner PLL latch output
— Not used. (Open)
O Volume data output
O Volume clock output
O System power control output
I Regulator check signal input
I Tape record signal input H: REC
I/O EEPROM input/output
I Key input
I Mode set input
I System reset input
I Oscillation input (4.19 MHz)
O Oscillation output (4.19 MHz)
— GND
O LCD drive port ON/OFF output
O LCD drive voltage output
O LCD drive common output
O LCD drive segment output
O LCD drive segment output
— Not used. (Open)
O Initial set signal output
O TONE control output
O MEGA BASS control output
O Battery check output
O MT control output H: Low voltage
O ISS1 output H: ISS1
O ISS2 output H: ISS2
O Tape function output H: Tape
O Tuner function output H: Radio
O CD function output H: CD
— Power supply pin (+3.3 V)
O Oscillation output (150 kHz)
I Oscillation input (150 kHz)
– 5 –
Pin Description
H: Power on
Not used. (Open)
L: LPF on
H: MEGA BASS on
H: Battery Low voltage
Not used. (Open)
Not used. (Open)