Read Sony CDX-747X Service Manual online
32
CDX-747X
7-13.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC201 MB90473PFV-G-108-BNDE1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1, 2
RAMA5, RAMA6
O
Address signal output to the S-RAM Not used (open)
3
ELVR
O
Motor drive signal (elevator down direction) output to the elevator motor drive (IC301)
“L” active *1
“L” active *1
4
ELVF
O
Motor drive signal (elevator up direction) output to the elevator motor drive (IC301)
“L” active *1
“L” active *1
5
LOADF
O
Motor drive signal (load chucking direction) output to the chucking motor drive (IC201)
“L” active *2
“L” active *2
6
LOADR
O
Motor drive signal (save direction) output to the chucking motor drive (IC201)
“L” active *2
“L” active *2
7, 8
RAMA7, RAMA12
O
Address signal output to the S-RAM Not used (open)
9
VSS
—
Ground terminal
10
RAMA14
O
Address signal output to the S-RAM Not used (open)
11
RAMWE
O
Write enable output to the S-RAM Not used (open)
12 to15
RAMA13, RAMA8,
RAMA9, RAMA11
O
Address signal output to the S-RAM Not used (open)
16
UNI SI
I
Serial data input from the SONY bus interface (IC302)
17
UNI SO
O
Serial data output to the SONY bus interface (IC302)
18
UNI CK
I
Serial data transfer clock signal input from the SONY bus interface (IC302)
19
LEDDAT
O
Not used (open)
20
LEDCLK
O
Not used (open)
21
VCC
—
Power supply terminal (+3.3V)
22
LEDLAT
O
Not used (open)
23
CDON
O
D/A converter and servo section power supply on/off control signal output “H”: power on
24
ELVON
O
Mechanism deck section power supply on/off control signal output “H”: power on
25
RX
I
Input terminal at the flash memory data write mode Not used (open)
26
TX
O
Output terminal at the flash memory data write mode Not used (open)
27
NC
O
Not used (open)
28
EECLK
O
Serial data transfer clock signal output to the EEPROM (IC203)
29
FL BOOT
I
Flash memory data write control signal input terminal “L” active Not used (fixed at “H”)
30, 31
NC
O
Not used (open)
32
EEDAT
I/O
Two-way data bus with the EEPROM (IC203)
33
AVCC
—
Power supply terminal (+3.3V) (for A/D converter)
34
AVRH
I
Reference voltage (+3.3V) input terminal (for A/D converter)
35
AVSS
—
Ground terminal (for A/D converter)
36
EHS
I
Elevator height position detection signal input from the RV202 (elevator height sensor)
(A/D input)
(A/D input)
37
MCK
I
Input of detection signal for the fine adjustment (elevator height (address) adjustment; RV201) of
elevator height position (A/D input)
elevator height position (A/D input)
38, 39
KEY0, KEY1
I
Not used (open)
40
VSS
—
Ground terminal
41
FOK
I
Focus OK signal input from the CXD3027R (IC101) “L”: NG, “H”: OK
42
GFS
I
Guard frame sync signal input from the CXD3027R (IC101) “L”: NG, “H”: OK
43
SCLK
O
Serial data reading clock signal output to the CXD3027R (IC101)
44
SENS
I
Internal status signal (sense signal) input from the CXD3027R (IC101)
45
BUSON
I
Bus on/off control signal input from the SONY bus interface (IC302) “H”: bus on
46
BUCHK
I
Battery detection signal input “L”: battery on
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