Read Sony STR-DA90ESG Service Manual online
– 11 –
S VIDEO BOARD IC809 MB90T673PF-G-BND (ON SCREEN DISPLAY CONTROLLER)
Pin No.
Pin Name
I/O
Function
1
AD14
I/O
2
AD15
I/O
3
A16
O
4
A17
O
Address signal output to the program RAM (IC820)
5
A18
O
6
A19
O
Chip enable signal output to the program RAM (IC820) and S-RAM (IC821, 822)
7
PCE
O
Chip enable signal output to the RC controller (IC815)
8
PCLK
O
Serial data transfer clock signal output to the RC controller (IC815)
9
PDATA-OUT
O
Serial data output to the RC controller (IC815)
10
PDATA-IN
I
Serial data input from the RC controller (IC815)
11
GND
—
Ground terminal
12
ALE
O
Address latch enable signal output to the interface latch (IC816, 818)
13
RDX
O
Read strobe signal output to the program RAM (IC820) and S-RAM (IC821, 822)
14
WRLX
O
Write strobe signal output to the S-RAM (IC821) (for lower 8 bit)
15
WRHX
O
Write strobe signal output to the S-RAM (IC822) (for higher 8 bit)
16
CTR-S-MON
O
Not used (open)
17
CNT-S-V2
O
Not used (open)
18
CTR-S-OUT
O
Not used (open)
19
CTR-S-V1
O
Not used (open)
20
RX (SIN)
I
Receive data input from the FL drive controller (IC105)
21
TX (SOUT)
O
Transmit data output to the FL drive controller (IC105)
22
RES
O
Reset signal output to the RC controller (IC815) “L”: reset
23
—
—
Not used (open)
24
DATA (OSD)
O
Serial data output to the MB90095PF-G (IC805)
25
CLK (OSD)
O
Serial data transfer clock signal output to the MB90095PF-G (IC805)
26
LAT (OSD)
O
Serial data latch pulse signal output to the MB90095PF-G (IC805)
27
—
—
Not used (open)
28
AVCC
—
Power supply terminal (+5V)
29
AVR+
I
Reference voltage input terminal (+5V)
30
AVR–
I
Reference voltage input terminal (+0V)
31
AVSS
—
Ground terminal
32
VOL A/D
I
A/D conversion input terminal for the volume (fixed at “L”)
33
XP-RS
I
Data reception ready signal input from the RC controller (IC815)
34
GND
—
Ground terminal
35
P-TDAT
I
Infrared rays transmission data status signal input from the RC controller (IC815)
“H”: exist, “L”: nothing
“H”: exist, “L”: nothing
36
P-OK
I
Learning OK status signal input from the RC controller (IC815)
37
M FULL
I
Memory full status signal input from the RC controller (IC815)
38
BACK UP NG
I
Backup NG status signal input from the RC controller (IC815)
39
P-NG
I
Learning NG status signal input from the RC controller (IC815)
40
P-IR
I
Learn IR signal input terminal “H”: no signal
41
MODE0
I
Mode selection terminal (fixed at “H”)
42
MODE1
I
Mode selection terminal (fixed at “L”)
43
MODE2
I
Mode selection terminal (fixed at “L”)
44
HSTX
I
Hardware standby signal input terminal (fixed at “H”)
45
STOP
I
Stop signal input terminal
Two way data bus with the program ROM (IC820), S-RAM (IC822) and address data (for
address signal) output to the interface latch (IC818)
address signal) output to the interface latch (IC818)
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