XRT4000 Datasheet, PDF (44/46 Pages) Exar Corporation – Universal Multiprotocol Serial Interface

XRT4000
Scenario 21
TXD
75
82
SCTE
78
TXD
97
TX1
77
98
79
96
TX2
80
95
RX1
RX2
100
RXD
93
RXC
TXC
RXC
RXD
HDLC (L)
Options
DTE
DCE
87
90
RX3
88
87
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 21)
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
X
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
X
1
1
1
1
Rev. 1.00
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