Ricoh FACSIMILE FAX77 - Page 179

CN15 - OPU
Pin Name
Function V
1
COM1 Ground
0
2 XMICIN Signal from microphone
3 1OPSID OPU status data
4 1OPSOD OPU drive data
5 5OPSCK OPU data clock
5
6 5OPMOD Chip select (H: OPP, L: OPP3)
7
- 5V
8 COM1
9 + 5V
CN16 - Speaker
Pin Name Function V
1 MONISP Signal to speaker
0
2
COM1 Ground 0
CN17 - Modem
Pin Name Function V
1
2
3
4
5
6
7
8
1RD
5WR
+ 5V
+ 5V
D6
5MCS0
D7
A2
Read enable 2
Write enable
5
Supply from FCU 5
Supply from FCU 5
Data bus
1.5
Chip select 5
Data bus
Address bus
9 D5
10 A0
11
12
13
14
COM1
15
D3
16
17
5CTS
18 5MCS1
19
5RTS
20, 21
22 5G2CLK
23 D1
24
25
26 + 12V
27 A1
28 D2
29 D0
30
A3
31 D4
32 5MINT
33 1CABS1
34 1CABS2
35
36
37
- 12V
38 XTXOUT
39 COM1
40
XRXIN
Data bus
Address bus
Not used
Not used
Not used
Ground
0
Data bus
Not used
Clear to send (Active L)
5
Chip select 5
Ready to send
5
Not used
G2 clock
Data bus
Not used
Not used
Supply from FCU
Address bus
Data bus
Data bus
Address bus
Data bus
Interrupt request
5
Cable select
0
Cable select 0
Not used
Not used
Supply from FCU
-12
Data for transmission
0
Ground
0
Received data 0
12
7-5