Sony HCD-MD555, Service Manual

Page: 91 / 124

— 117 —
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
I/O
O
I
O
O
O
—
O
I
—
O
O
I
O
—
I
—
I
I
I
I
O
O
O
O
O
O
I
I
I/O
I/O
O
O
O
O
O
I
O
O
I
I
Description
Data output to the MD WALKMAN
Clock input from the MD WALKMAN
L-CH level output
R-CH level output
Data output to LED display. Not used in this set
Clock output to LED display. Not used in this set
Input signal selecting the external bus data width of the master controller (IC500). Not used in this set
(fixed at “L”)
Ground terminal
Sub system clock input terminal. Not used in this unit (pull down)
Sub system clock output terminal. Not used in this unit (pull down)
System reset signal input from the reset signal generator (IC400)
“L”: reset. “L” is input about several hundred milliseconds after the power is turned on, then this terminal
changesto “H”
Main system clock output terminal (7 MHz)
Ground terminal
Main system clock input terminal (7 MHz)
Power supply terminal (+3.3 V)
NMI input. Not used in this unit (fixed at “H”)
Power down detection input terminal. “L” is input when voltage decreases
Sync input from the MD WALKMAN
I2C bus busy signal output
L3 bus clock output
L3 bus data output
Elevator-up signal output
Elevator down signal output
Subcode Q sync (SCOR) input from CXD2654AR (IC121). “L” is output every 13.3 mseconds.
“H” is output in most cases
Reset input
I2C bus clock input/output
I2C bus data input/output
Serial data output for display. Not used in this set (open)
Not used in this set (open)
Serial clock output for display Not used in this set (open)
Chip select signal output for display Not used in this set (open)
Write data output to CXD2654AR (IC121)
Read data input from CXD2654AR (IC121)
Serial clock output to CXD2654AR (IC121)
Not used in this set (open)
Elevator position sensor input (main)
Elevator position sensor input (sub)
Pin Name
WMOUT
WMCLK
LEVEL-L
LEVEL-R
LEDDATA
—
LEDCLK
BYTE
CNVSS
XIN-T
XOUT-T
S. RST
XOUT
GND
XIN
+3.3V
NMI
P.DOWN
WMSYNC
12CBUSY
L3 CLK
L3 DATA
—
ELEUP
—
ELEDOWN
SQSY
RESET SW
12CCLK
12CDATA
FLDATA
—
FLCLK
FLCS
SWDT
SRDT
SCLK
OPTSEL0
SENSOR
SENSOR2
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IC316 MD MECHANISM CONTROLLER (M30624MG-205C) (BD (MD) BOARD)