Diagrams; Ic Pin Description - Sony CDX-4270R Service Manual

4-1. IC PIN DESCRIPTION

• IC801 MB90574APMT-G-212-BND (SYSTEM CONTROL)
Pin No. Pin Name
1 LD ON
2 FOK
3 XLAT25
4 DATA25
5 XRST
6 GFS
7 NIL
8 VCC
9 – 11 NIL
12 FLS SI/NOSE1
13 LCD SO/FLS SO
14 LCD CKO
15 BEEP
16 NIL
17 SQ SI
18 NIL
19 SQ CKO
20 UNI SI
21 UNI SO
22 UNI CK
23 C IN
24 SIRCS
25 TXT SI
26 NIL
27 TXT CKO
28 CLOK25
29 SYSRST
30 DEEMPH
31 AMP ATT
32 MD ON
33 VSS
34 C
35 CD ON
36 BUS ON
37 NIL
38 DVCC
39 DVSS
40 NIL
41 ANGLE
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 – 48 KEY IN0 – 2
49 RC IN0
50 QUALITY
51 NIL
52 MPDH
53 S-METER
54 VCC
55 NS MASK
20
SECTION 4

DIAGRAMS

I/O
O Laser ON/OFF control output
I Focus OK signal detection input
O CD signal processing latch output
O CD signal serial data output
O Reset output to CD signal processor IC.
I GFS signal detection input
— Not used. (Connect to ground in this set.)
— Power supply pin (+5 V)
— Not used. (Open)
I Front panel attachment detection input
O LCD serial data output
O LCD serial clock output
O BEEP output
— Not used. (Open)
I Sub Q data input
— Not used. (Connect to ground in this set.)
O Sub Q read clock output
I SONY BUS system serial interface input
O SONY BUS system serial interface output
I/O SONY BUS system serial clock input/output
I Track jump No. count input
I Remote commander input
I CD-TEXT data input (Not used in this set.)
— Not used. (Connect to ground in this set.)
O CD-TEXT data read clock output (Not used in this set.)
O CD signal processing serial clock output
O System reset output
O De-emphasis output
O Power amplifier attenuator control output
O CD mechanism power control output
— Ground
— Power stabilization capacitor pin
O CD power control output
O BUS ON control output (Not used in this set.)
O Power control output of A/D conversion.
— VREF input of D/A converter.
— Ground of D/A converter.
— Not used. (Open)
O LCD view angle alignment output (Not used in this set.)
— Analog power supply pin (+5 V)
— VREF + input of A/D converter.
— VREF – input of A/D converter.
— Analog ground
I Key input 0 – 2
I Rotary commander input 0
I Noise detection input
— Not used. (Connect to ground in this set.)
I Tuner multi path input
I S-meter voltage detection input
— Power supply pin (+5 V)
O Noise detection output
Pin Description