XRT4500 Datasheet, PDF (84/99 Pages) Exar Corporation – MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

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SCENARIO 7 & 2
XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.7
HDLC (L)
60
TXD
67
SCTE
TXC
73
74
RXC
RXD
1
INPUT PIN SETTINGS
DTE (#7)
DCE (#2)
MUX 1
63 TXD 78
TX1
62
RX1
1
79
64 _{SCTE 77}
TX2
65
74
RX2
76
70 TXC 70
RX3
71
71
72 _RXC 64
RX2
76
65
78 _RXD 63
RX1
79
62
68
TX3
67
TX2
60
TX1
XRT4500
XRT4500
HDLC (R)
RXD
RXC
TXC
SCTE
TXD
DTE (#7)
PIN
#
NAME
STATE
DESCRIPTION
31 DCE/DTE
0
DTE
34
EC
1
No Echo
50 2CK/3CK
0
3 clock
18
LP
0
Loopback
54
CKINV
0
Invert
55
DTINV
1
No Invert
53
OSCEN
1
No Internal OSC
DCE (#2)
PIN
#
NAME
STATE
DESCRIPTION
31 DCE/DTE
1
DCE
34
EC
1
No Echo
50 2CK/3CK
0
3 clock
18
LP
1
No Loopback
54
CKINV
1
No Invert
55
DTINV
1
No Invert
53
OSCEN
1
No Internal OSC
NOTE: When M0=1, M2=1, M2=0 the XRT4500 is in the 1 clock (X.21) mode and the 2CK/3CK input pin is ignored.
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