Read Sony PCM-R300 Service Manual online
– 58 –
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14 to 21
22 to 29
30
31
32
33
34 to 57
58 to 70
71
72
73
74 to 77
78
79
80
Pin Name
H
RMC
TEST
A1 METER
A2 METER
M MUT
ACK
SC
SI
SO
CS METER
RD METER
WR METER
—
AD0 to AD7
XRST
EXTAL
XTAL
VSS
S0 to S23
T12 to T0
VFDP
VDD
NC
D0 to D3 METER
H
REQ
MODE
I/O
I
I
I
O
O
I
O
I
I
O
O
O
O
O
I
I
I
O
—
O
O
I
—
—
I/O
I
I
I
Function
Fixed at “H”
Remote control signal input
Test pin
“L”: Test mode (For Fluorescent indicator, key and remote commander check)
Digital peak level meter 4-bit address bus
Level meter mute signal input
Communication standby complete signal output to main, mecha control
Serial clock input from main, mecha control
Serial data input from main, mecha control
Serial data output to main, mecha control
Chip select signal output to Digital peak level meter
Read signal output to Digital peak level meter
Write signal output to Digital peak level meter
Not used
Key input
System reset input
“L”: Active
System clock input (4.19MHz)
System clock output (4.19MHz)
Ground
Fluorescent indicator tube segment drive output
Fluorescent indicator tube grid drive output
–30V power supply for driving fluorescent indicator tube
Power supply (+5V)
Connected to +5V
Digital peak level meter 4-bit data bus
Fixed at “H”
Communication request signal input from main, mecha control
Fixed at “L”
• IC801 Display Control (CXP82320-086Q)
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
DATA
BCK
LRCK
XRST
WR
RD
CS
VSS
D0
NC
D1
D2
D3
A0
A1
VDD
• IC802 Digital Peak Level Meter (MSM6338RS)
I/O
I
I
I
I
I
I
I
—
I/O/Z
—
I/O/Z
I/O/Z
I/O/Z
I
I
—
Function
fs serial data input (2’s complement)
fs serial data fetch clock (Bit clock)
fs input Lch/Rch discrimination signal
“H”: Rch, “L”: Lch
Reset input
“L”: Reset
Data write request input (Data write at rising edge)
Data read request input
“L”: Read enable
Chip select input
“L”: Select
Ground
4-bit data bus (Tristate)
Not used
4-bit data bus (Tristate)
Address input Selects internal register
Power supply (+5V)
O/Z: In case of no output data, it becomes high impedance.
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