XRT4500 Datasheet, PDF (88/99 Pages) Exar Corporation – MULTIPROTOCOL SERIAL NETWORK INTERFACE IC

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SCENARIO 13 & 10
HDLC (L)
60
TXD
67
SCTE
73
TXC
74
RXC
1
RXD
INPUT PIN SETTINGS
XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.7
DTE (#13)
63
TX1
62
64
TX2
65
TXD
78
79
77
76
DCE (#10)
RX1
1
RX2
74
70
TXC
70
RX3
71
68
71
TX3
72
RXC
64
67
RX2
76
65
TX2
78
RXD
63
RX1
79
60
62
TX1
XRT4500
XRT4500
HDLC (R)
RXD
RXC
TXC
SCTE
TXD
DTE (#13)
PIN
#
NAME
STATE
DESCRIPTION
31 DCE/DTE
0
DTE
34
EC
1
No Echo
50 2CK/3CK
1
2 clock
18
LP
1
No Loopback
54
CKINV
0
Invert
55
DTINV
1
No Invert
53
OSCEN
1
No Internal OSC
DCE (#10)
PIN
#
NAME
STATE
DESCRIPTION
31 DCE/DTE
1
DCE
34
EC
1
No Echo
50 2CK/3CK
1
2 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.
85