20
PSR-9000
PIN
No.
NAME
I/O
FUNCTION
PIN
No.
NAME
I/O
FUNCTION
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
S1
S2
S3
S4
S5
VREF+
VDD
OSC2
OSC1
VSS
XI
XO
MMOD
RD0
RXD
D0
D1
D2
D3
D4
/RST
D5
D6
D7
D8
D9
S6
S7
S8
S9
S10
S11
I
I
I
I
I
-
-
O
I
-
I
O
I
O
I
O
O
O
O
O
I
O
O
O
O
O
I
I
I
I
I
I
Switch matrix data
Power supply (+5V, analog)
Power supply (+5V)
Crystal oscillator (8MHz)
Crystal oscillator (8MHz)
Ground
Not used
Not used
Memory mode select (Grounded)
Rotary encoder data
MIDI receive data
LED and switch drive data
Reset
LED and switch drive data
Switch matrix data
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
S12
S13
S14
TXD
S15
S16
S17
S18
L16
L17
L18
L19
L8
L9
L10
L11
L12
L13
L14
L15
L7
L6
L5
L4
L3
L2
L1
L0
VREF
AD0
AD1
S0
I
I
I
O
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
-
I
I
I
Switch matrix data
MIDI transmit data
Switch matrix data
LED drive data
LED and switch drive data
Grounded
Analog input
Analog input
Switch matrix data
MN101C027YB (XS711200) CPU
EN: IC1
PIN
No.
NAME
I/O
FUNCTION
PIN
No.
NAME
I/O
FUNCTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D2
D3
RXD
GND
D4
D5
D6
D7
/TXC
/WR
/CS
C//D
RD
RXRDY
I
I
I
-
I
I
I
I
I
I
I
I
I
O
Data bus
Data bus
Receive data
Ground
Data bus
Data bus
Data bus
Data bus
Transmitter clock
Write control
Device select
Low: Access data
High: command word, status word
Read control
Receive ready
15
16
17
18
19
20
21
22
23
24
25
26
27
28
TXRDY
SYNDET/BD
/CTS
TXEMPTY
TXD
CLK
RESET
/DSR
/RTS
/DTR
/RXC
VCC
D0
D1
O
I/O
I
O
O
I
I
I
O
O
I
-
I
I
Transmit ready
Receiver/Break
MODEM control
Transmitter empty
Transmission data
Main clock
System reset
MODEM control
MODEM control
MODEM control
MODEM control
Power supply (+5V)
Data bus
Data bus
MSM82C51A-2GS-K (XV513A00) USART (Serial Control)
DP: IC7
