6-12. Ic Pin Function Description - Sony CDX-646 Service Manual

6-12. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC201 CXP740056-007R (SYSTEM CONTROLLER)
Pin No. Pin Name
1 ESPSEL
2 ML
3 EMPHO
4 AMUTE
5 CDXLT
6 CDDATA
7 CDCLK
8 CDON
9 ELVON
10 DOUTSEL
11 NC
12 RAMWE
RAMIO8 to
13 to 20
RAMIO1
RAMA7 to
21 to 28
RAMA0
29 NC
RAMA14 to
30 to 36
RAMA8
37 RAMCS
38 RESET
39 GND
40 XTAL
41 EXTAL
42 TEXTSEL
43 SI
44 SO
45 SCLK
46 CFSEL
47 EEINIT
48 EEDATA
49 EECLK
50 VSS
51 AVREF
52 VDD
53 SINGLE
54 LDON
55 AGCHOLD
56 RFAGC
57 AD
58 AD
30
I/O
I ESP on/off setting terminal Not used (fixed at "L")
Normal/high speed playback control signal output terminal "L": high speed playback
O
Not used (open)
O Emphasis signal output terminal Not used (open)
O Audio line muting on/off control signal output terminal "H": muting on
O Serial data latch pulse signal output to the CXD2598Q (IC101)
O Serial data output to the CXD2598Q (IC101)
O Serial data transfer clock signal output to the CXD2598Q (IC101)
O D/A converter and servo section power supply on/off control signal output "H": power on
O Mechanism deck section power supply on/off control signal output "H": power on
I Digital output on/off control signal input terminal
— Not used (open)
O Data write enable signal output to the S-RAM
I/O Two-way data bus with the S-RAM Not used (open)
O Address signal output to the S-RAM Not used (open)
— Not used (open)
O Address signal output to the S-RAM Not used (open)
O Chip select signal output to the S-RAM "L": active Not used (open)
System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC303)
I "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
— Ground terminal
O Main system clock output terminal (12 MHz)
I Main system clock input terminal (12 MHz)
CD text mode setting terminal "L": CD text on, "H": does not display track name
I
Not used (open)
I Serial data input from the SONY bus interface (IC302)
O Serial data output to the SONY bus interface (IC302)
I Serial data transfer clock signal input from the SONY bus interface (IC302)
I Custom file on/off setting terminal "L" custom file on Not used (open)
I Initialize signal input for the EEPROM "H": format Not used (open)
I/O Two-way data bus with the EEPROM Not used (open)
O Serial data transfer clock signal output to the EEPROM Not used (open)
— Ground terminal (for A/D converter)
I Reference voltage (+5V) input terminal (for A/D converter)
— Power supply terminal (+5V) (for A/D converter)
Setting terminal for the single disc/multiple discs mode
I
"L": single mode, "H": multiple discs mode Fixed at "H" in this set (open)
O The laser automatic power control on/off signal output "H": automatic power control on
O RF AGC hold on/off signal output "H": hold
I/O RF AGC level control signal output "L": off, center voltage: 40%, "H": 60%
I A/D input terminal Not used (open)
I A/D input terminal Not used (fixed at "L")
Description
"L": digital output on Not used (open)
"L": active Not used (open)