Sharp FO-5700, Service Manual, Page: 49 / 140

FO-5700U
5 – 5
1 NC NC
2 NC – –
3 NC – –
4 NC – –
5 –RI/TXRQ OA DTE Serial/DMA Interface
6 RINGD IA LIU: RINGD
7 –RTS IA DTE serial Interface
8 IRQ OA Host Parallel Interface
9 D1 IA/OB Host Parallel Interface
10 DGND1 GND
11 VDD1 PWR
12 XTLI I Crystal/Clock Circuit
13 XTLO O Crystal/Clock Circuit
14 D0 IA/OB Host Parallel Interface
15 D2 IA/OB Host Parallel Interface
16 D3 IA/OB Host Parallel Interface
17 D5 IA/OB Host Parallel Interface
18 D7 IA/OB Host Parallel Interface
19 DGND2 GND
20 RS0 IA Host Parallel Interface
21 5VA PWR
22 AGND1 GND
23 RIN I(DA) Line Interface
24 VC MI To GND through capacitors
25 VREF MI To VC through capacitors
26 TXA2 O (DD) Line Interface
27 TXA1 O (DD) Line Interface
28 –TALK (–RLYB) OA Line Interface
29 SPKR O (DF) Speaker Circuit
30 AGND2 GND
31 –OHRC (–RLYA) OD Line Interface
32 –POR MI MDP: –RESET
33 NC – –
34 –DTR IA DTE Serial Interface
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
35 RXD OA DTE Serial Interface
36 VDD2 PWR
37 –CTS OA DTE Serial Interface
38 NC – –
39 NC – –
40 DGND3 GND –
41 VDD3 PWR –
42 NC – –
43 DGND4 GND –
44 NC – –
45 NC – –
46 EYESYNC OA Eye Pattern Test Circuit
47 –EYECLK OA Eye Pattern Test Circuit
48 EYEXY OA Eye Pattern Test Circuit
49 NC – –
50 TDCLK OA DTE Serial Interface
51 –RLSD OA DTE Serial Interface
52 –RDCLK OA DTE Serial Interface
53 GP0 MI MDP: EYESYNC
54 XTCLK IA DTE Serial Interface
55 DGND5 GND
56 VDD4 PWR
57 TXD IA DTE Serial Interface
58 –DSR/RXRQ OA DTE Serial/DMA Interface
59 –RESET OA Host Parallel Interface
60 –READ IA Host Parallel Interface
61 –WRITE IA Host Parallel Interface
62 –CS IA Host Parallel Interface
63 RS4 IA Host Parallel Interface
64 RS3 IA Host Parallel Interface
65 RS2 IA Host Parallel Interface
66 RS1 IA Host Parallel Interface
67 D6 IA/OB Host Parallel Interface
68 D4 IA/OB Host Parallel Interface
Table 2-1. MDP Pin Signals -68- Pin PLCC
Pin Signal Label I/O Type Interface 3 Pin Signal Label I/O Type Interface