Sharp FO-5700 Service Manual page 49

Pin Signal Label
1 NC
2 NC
3 NC
4 NC
5 –RI/TXRQ
6 RINGD
7 –RTS
8 IRQ
9 D1
10 DGND1
11 VDD1
12 XTLI
13 XTLO
14 D0
15 D2
16 D3
17 D5
18 D7
19 DGND2
20 RS0
21 5VA
22 AGND1
23 RIN
24 VC
25 VREF
26 TXA2
27 TXA1
28 –TALK (–RLYB)
29 SPKR
30 AGND2
31 –OHRC (–RLYA)
32 –POR
33 NC
34 –DTR
Notes:
1. I/O types:
MI= Modem interconnect.
IA, IB= Digital input
OA, OB = Digital output
I (DA) = Analog input
O (DD), O (DF) = Analog output
2. NC= No external connection allowed
3. Interface Legend:
MDP = Modem Data Pump
DTE = Data Terminal Equipment
Table 2-1. MDP Pin Signals -68- Pin PLCC
I/O Type Interface 3
NC
– –
– –
– –
OA DTE Serial/DMA Interface
IA LIU: RINGD
IA DTE serial Interface
OA Host Parallel Interface
IA/OB Host Parallel Interface
GND
PWR
I Crystal/Clock Circuit
O Crystal/Clock Circuit
IA/OB Host Parallel Interface
IA/OB Host Parallel Interface
IA/OB Host Parallel Interface
IA/OB Host Parallel Interface
IA/OB Host Parallel Interface
GND
IA Host Parallel Interface
PWR
GND
I(DA) Line Interface
MI To GND through capacitors
MI To VC through capacitors
O (DD) Line Interface
O (DD) Line Interface
OA Line Interface
O (DF) Speaker Circuit
GND
OD Line Interface
MI MDP: –RESET
– –
IA DTE Serial Interface
Pin Signal Label
35 RXD
36 VDD2
37 –CTS
38 NC
39 NC
40 DGND3
41 VDD3
42 NC
43 DGND4
44 NC
45 NC
46 EYESYNC
47 –EYECLK
48 EYEXY
49 NC
50 TDCLK
51 –RLSD
52 –RDCLK
53 GP0
54 XTCLK
55 DGND5
56 VDD4
57 TXD
58 –DSR/RXRQ
59 –RESET
60 –READ
61 –WRITE
62 –CS
63 RS4
64 RS3
65 RS2
66 RS1
67 D6
68 D4
5 – 5
FO-5700U
I/O Type Interface
OA DTE Serial Interface
PWR
OA DTE Serial Interface
– –
– –
GND –
PWR –
– –
GND –
– –
– –
OA Eye Pattern Test Circuit
OA Eye Pattern Test Circuit
OA Eye Pattern Test Circuit
– –
OA DTE Serial Interface
OA DTE Serial Interface
OA DTE Serial Interface
MI MDP: EYESYNC
IA DTE Serial Interface
GND
PWR
IA DTE Serial Interface
OA DTE Serial/DMA Interface
OA Host Parallel Interface
IA Host Parallel Interface
IA Host Parallel Interface
IA Host Parallel Interface
IA Host Parallel Interface
IA Host Parallel Interface
IA Host Parallel Interface
IA Host Parallel Interface
IA/OB Host Parallel Interface
IA/OB Host Parallel Interface