27
Rev: A Date: 1/27/04
SP505 Multi–Mode Serial Transceiver
Copyright 2004 Sipex Corporation
Figure 55. Mode Diagram — RS-422
MODE: RS-422
[w/ termination]
DRIVER/RECEIVER
DEC
3
DEC
2
DEC
1
DEC
0
0 1 0 0
RD(a) 70
RxD 1
RT(a) 37
RxC 20
SCT(a) 76
SCT 79
SCTEN 7
SCT(b) 77
15 TxC
63 TT(a)
65 TT(b)
6 TTEN
RECEIVERS DRIVERS
22 ST
42 ST(a)
44 ST(b)
23 STEN
CS(a) 66
CTS 80
RR(a) 35
DCD 19
RR(b) 36
CS(b) 67
RT(b) 38
RD(b) 71
24 LL
51 LL(a)
49 LL(b)
5 LLEN
14 TxD
61 SD(a)
59 SD(b)
2 SDEN
13 DTR
58 TR(a)
56 TR(b)
3 TREN
16 RTS
54 RS(a)
52 RS(b)
4 RSEN
17 RL
47 RL(a)
45 RL(b)
18 RLEN
IC(a) 39
RI 21
IC(b) 40
DM(a) 68
DSR 78
DM(b) 69
1
1
1
