Diagrams; Ic Pin Description - Sony CDX-CA680X Service Manual

3-1. IC PIN DESCRIPTION

• IC501 MN101C49KSE (SYSTEM CONTROL)
Pin No. Pin Name
1 VREF–
2 VSM
3 QUALITY
4, 5 KEYIN1, 0
6 RCIN0
7 – 9 NIL
10 VREF+
11 VDD
12 OSCOUT
13 OSCIN
14 VSS
15 XIN
16 XOUT
17 MMOD
18 LCDSO
19 LCDCE
20 LCDCKO
21 CD_TSO
22 CD_TSI
23 CD_TCKO
24 SYSRST
25 BUSON
26 KEYACK
27 DAVN
28 BUIN
29 SIRCS
30 TU_ATTIN
31 CD_PACK
32 NC (VCC)
33 RESET
34 NOSE-SW
35 BEEP
36 NC
37 TESTIN
38 ACCIN
39 NC
40 TELATT
41 NC (VCC)
42 UNISO
43 UNISI
44 UNICKO
45 I2C_SIO
46 NC
47 I2C_CKO
48, 49 NC
50 CD_SELFSW
51 TSTB
52 RFOK
53 CD_RST
54 A0
55 STB
SECTION 3

DIAGRAMS

I/O
— A/D converter power supply (–) pin
I S-meter voltage detection input
I Noise detection input
I Key input 1, 0
I Rotary commander key input
I Not used. (Fixed at L in this set)
— A/D converter power supply (+) pin (+5 V)
— Power supply pin (+5 V)
O Main clock output (18.432 MHz)
I Main clock input (18.432 MHz)
— Ground
I Sub clock input (32.768 kHz)
O Sub clock output (32.768 kHz)
I Not used. (Fixed at L in this set)
O Serial data output for LCD driver IC.
O Chip enable output for LCD driver IC.
O Serial clock output for LCD driver IC.
O Serial data output for CD servo IC.
I Serial data input from CD servo IC.
O Serial clock output for CD servo IC.
O System reset output (Used for CDX-CA680X only)
O BUS ON output (Used for CDX-CA680X only)
I Key acknowledge detection input
I RDS data block synchronization detection input
I Backup power supply input
I SIRCS input
I Tuner attenuator control input
I CD text pack synchronization signal input from CD servo IC.
— Power supply pin (+5 V)
I Microcomputer reset input
I Front panel attachment detection input
O Beep output
O Not used. (Open)
I Test mode detection input
I Accessory power supply detection input
O Not used. (Open)
I Telephone attenuator detection input
I Not used. (Fixed at H in this set)
O SONY-BUS data output (Used for CDX-CA680X only)
I SONY-BUS data input (Used for CDX-CA680X only)
O SONY-BUS clock output (Used for CDX-CA680X only)
2
I/O I C BUS serial data input/output
O Not used. (Open)
2
O I C BUS serial clock output
O Not used. (Open)
I CD mechanism deck Self switch detection input
O CD text parameter strobe output for CD servo IC.
I RFOK signal input from CD servo IC.
O Reset signal output for CD servo IC.
O Command/parameter discrimination signal output for CD servo IC.
O Data strobe signal output for CD servo IC.
CDX-CA680X/L580X
Pin Description
13