Sony XES-Z50 (serv.man4) Service Manual ▷ View online
– 37 –
Pin No.
Pin Name
I/O
Function
85
PBS
I
Parking brake detection signal input terminal Not used (fixed at “L”)
86
AVSS
—
Ground terminal (for A/D conversion)
87
BUS-ON
I
Bus on/off detection interrupt signal input from the tuner/system controller (IC500)
“L”: bus on
“L”: bus on
88
SRAM-CS
O
Chip enable signal output to the S-RAM (IC702)
89
DEC-CS
O
Chip enable signal output terminal Not used (pull up)
90
DEC-INT
I
Interrupt signal input terminal Demodulation data are read by detecting a falling edge
Not used (open)
Not used (open)
91
ROM-CS
O
Chip enable signal output to the flash memory (IC701)
92
VSS
—
Ground terminal
93
BL-ON
O
Output of power on/off control signal for the back light in display unit “H”: power on
94
LINK-OFF
O
Bus on/off control signal output to the SONY bus interface (IC515) “L”: bus on
95
DEC-ON
O
Output of power on/off control signal for the external device
“H”: power on Not used (open)
“H”: power on Not used (open)
96
DEC-CLR
O
Reset signal output terminal “L”: reset Not used (open)
97
DABTES
O
Not used (pull up)
98
A22
O
Address signal output terminal Not used (open)
99
X.TEST
I
100
A20
O
Address signal output terminal Not used (open)
Input of personal computer connection detection
“H”: When display panel is attached at front panel position
“L”: When personal computer communication accessory is attached
“H”: When display panel is attached at front panel position
“L”: When personal computer communication accessory is attached
– 38 –
•
DISPLAY BOARD IC901 HD6473048SF16-DISP01 (DISPLAY CONTROLLER)
Pin No.
Pin Name
I/O
Function
1
VCC
—
Power supply terminal (+5V)
2
TIR
O
LED drive signal output for the TIR indicator “H”: LED on
3
NCO
O
4
NCO
O
5
NCO
O
Not used (open)
6
NCO
O
7
NCO
O
8
LCD-START
O
9
LCD-BUSY
I
Input of busy signal from the LCD controller for liquid crystal module
At the timing of “H”
→
“L”, data transmission to LCD controller for liquid crystal module starts
10
RESO
O
Reset signal output to the external device Not used (pull-up)
11
VSS
—
Ground terminal
12
TX-LCD
O
Transmit data output to the display controller (IC700)
13
NCO
O
Not used (open)
14
RX-LCD
I
Receive data input from the display controller (IC700)
15
NCO
O
16
NCO
O
Not used (open)
17
NCO
O
18
D0
I/O
19
D1
I/O
20
D2
I/O
21
D3
I/O
22
VSS
—
Ground terminal
23
D4
I/O
24
D5
I/O
25
D6
I/O
26
D7
I/O
27
D8
I/O
28
D9
I/O
29
D10
I/O
30
D11
I/O
31
D12
I/O
32
D13
I/O
33
D14
I/O
34
D15
I/O
35
VCC
—
Power supply terminal (+5V)
36
A0
O
Address signal output terminal This set uses this as a control signal to the LCD controller for
liquid crystal module
liquid crystal module
37
A1
O
38
A2
O
Address signal output to the flash memory (IC931) and S-RAM (IC932)
39
A3
O
Output of command transmission start control signal to the LCD controller for liquid crystal
module The OR signal with the busy signal from LCD controller for liquid crystal module is
input to the LCD-BUSY (pin 9)
module The OR signal with the busy signal from LCD controller for liquid crystal module is
input to the LCD-BUSY (pin 9)
At the start of command transmission, the signal changes like “L”
→
“H”
→
“L” so as to be a start
trigger for the LCD controller = DMA controller
Two-way data bus with the flash memory (IC931), S-RAM (IC932), and LCD controller for
liquid crystal module
liquid crystal module
Two-way data bus with the flash memory (IC931) and S-RAM (IC932)
Two-way data bus with the flash memory (IC931) and S-RAM (IC932)
– 39 –
Pin No.
Pin Name
I/O
Function
40
A4
O
41
A5
O
42
A6
O
43
A7
O
44
VSS
—
Ground terminal
45
A8
O
46
A9
O
47
A10
O
48
A11
O
49
A12
O
50
A13
O
51
A14
O
52
A15
O
53
A16
O
54
A17
O
55
A18
O
56
A19
O
57
VSS
—
Ground terminal
58
NIH
I
Not used (fixed at “H”)
59
NCO
O
Not used (open)
60
NCO
O
Not used (open)
61
Ø
O
System clock output terminal Not used (open)
62
STBY
I
Hardware standby signal input terminal (fixed at “H”)
63
RES
I
Reset signal input from the display controller (IC700) “L”: reset
64
BU-IN
I
Not used (fixed at “H”)
65
VSS
—
Ground terminal
66
EXTAL
I
System clock input terminal (14.745 MHz)
67
XTAL
I
System clock input terminal (14.745 MHz)
68
VCC
—
Power supply terminal (+5V)
69
AS
O
Address strobe signal output terminal Not used (open)
70
RD
O
Data reading strobe signal output to the flash memory (IC931) and S-RAM (IC932)
71
HWR
O
Also, this is used as strobe signal output for data writing to the flash memory (IC931), strobe
signal output for higher byte data writing to the S-RAM (IC932), or latch signal to the LCD
controller for liquid crystal module
signal output for higher byte data writing to the S-RAM (IC932), or latch signal to the LCD
controller for liquid crystal module
72
LWR
O
Also, this is used as strobe signal output for data writing to the flash memory (IC931), strobe
signal output for lower byte data writing to the S-RAM (IC932), or latch signal to the LCD
controller for liquid crystal module
signal output for lower byte data writing to the S-RAM (IC932), or latch signal to the LCD
controller for liquid crystal module
73
MD0
I
Input terminal for setting microcomputer operation mode (fixed at “L”)
74
MD1
I
Input terminal for setting microcomputer operation mode (fixed at “H”)
75
MD2
I
Input terminal for setting microcomputer operation mode (fixed at “H”)
76
AVDD
—
Power supply terminal (+5V) (for A/D conversion)
77
AVREF
I
Reference voltage input terminal (+5V) (for A/D conversion)
78
NIL
I
79
NIL
I
80
NIL
I
81
NIL
I
82
NIL
I
83
NIL
I
Address signal output to the flash memory (IC931) and S-RAM (IC932)
Address signal output to the flash memory (IC931) and S-RAM (IC932)
Not used (fixed at “L”)
– 40 –
Pin No.
Pin Name
I/O
Function
84
CONTR
O
Contrast alignment signal output to the liquid crystal module (D/A output)
85
DIMER
O
Back light brightness control signal output to the liquid crystal module (D/A output)
86
AVSS
—
Ground terminal (for A/D conversion)
87
NCO
O
Not used (open)
88
SRAM-CS
O
Chip enable signal output to the S-RAM (IC932)
89
NIL
I
Not used (fixed at “L”)
90
ROM-CS
O
Chip enable signal output to the flash memory (IC931)
91
BOOT
I
Not used (fixed at “H”)
92
VSS
—
Ground terminal
93
NCO
O
Not used (open)
94
NCO
O
Not used (open)
95
LCD RST
O
Reset signal output terminal “H”: reset Not used (open)
96
NCO
O
Not used (open)
97
BEEP
O
Beep sound drive signal output terminal
98
NCO
O
Not used (open)
99
LCD-CS
O
100
A20
O
Address signal output terminal Not used (open)
Output of chip enable signal to the LCD controller for liquid crystal module The OR signal
with HWR (pin &¡) is used as a latch signal to the LCD controller for liquid crystal module
“L” is output at the LCD controller data transmission
with HWR (pin &¡) is used as a latch signal to the LCD controller for liquid crystal module
“L” is output at the LCD controller data transmission
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