Diagrams; Ic Pin Description - Sony CDX-CA890X Service Manual

3-1. IC PIN DESCRIPTION

• IC303 MN101C49KSH (SYSTEM CONTROL)
Pin No. Pin Name
1 VREF–
2 LVDATA
3 VSM
4 QUALITY
5, 6 KEYIN1, 0
7 RCIN0
8, 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 TUATTIN
31 CD_PACK
32 VDD2
33 RESET
34 NOSESW
35 BEEP
36 DSTSEL2
37 TESTIN
38 ACCIN
39 NCO (VCC)
40 TELATT
41 NCO (VCC)
42 UNISO
43 UNISI
44 UNICKO
45 I2C_SIO
46 NCO
47 I2C_CKO
48 STB
49 DIAG
50 SELFSW
SECTION 3

DIAGRAMS

I/O
— A/D converter power supply (–) pin
I Spectrum analyzer data input from electronic volume IC.
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 (18.43 MHz)
I Main clock input (18.43 MHz)
— Ground
I Sub clock input (32.768 kHz)
O Sub clock output (32.768 kHz)
I Memory mode select input (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
O BUS ON output
I Key acknowledge detection input
I Not used. (Open)
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
I Frequency select input
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
I SONY-BUS data input
O SONY-BUS clock output
2
I/O I C BUS serial data input/output
O Not used. (Open)
O I 2 C BUS serial clock output
O Standby control output for power amp IC.
I Mode input from power amp IC.
I CD mechanism deck Self switch detection input
Pin Description
CDX-CA890X
13