XRT4000 Datasheet, PDF (39/46 Pages) Exar Corporation – Universal Multiprotocol Serial Interface

XRT4000
Scenario 13
TXD
SCTE
TXC
RXC
RXD
HDLC (L)
Options
DTE
DCE
78
TXD
97
75
TX1
77
RX1
98
100
RXD
79
82
TX2
80
96
RX2
95
93
RXC
87
TXC
87
90
RX3
88
88
TX3
84
TXC
96
RXC
79
93
RX2
95
80
TX2
82
SCTE
97
RXD
78
100
RX1
98
75
77
TX1
TXD
T4000 (DTE)
T4000 (DCE)
HDLC (R)
Normal
Echo Mode
3 Clocks
2 Clocks
1 Clock (X.21)
No Loopback
Loopback
No Invert
Invert
Input Pin Settings (Scenario 13)
Pin Number
39
42
65
22
67
68
66
T4000 (DTE)
Name
DCE/DTE*
EC*
2CK/3CK*
LP*
CKINV*
DTINV*
EN_OSC*
State
0
1
1
1
0
1
1
Pin Number
39
42
65
22
67
68
66
T4000 (DCE)
Name
DCE/DTE*
EC*
2CK/3CK*
LP*
CKINV*
DTINV*
EN_OSC*
State
1
1
1
0
1
1
1
Rev. 1.00
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