XRT4000 Datasheet, PDF (43/46 Pages) Exar Corporation – Universal Multiprotocol Serial Interface

XRT4000
Scenario 20
TXD
SCTE
TXC
RXC
RXD
HDLC (L)
Options
DTE
DCE
75
TX1
82
TX2
78 ^{TXD 97}
77
98
79
96
80
95
87
87
90
RX3
88
88
96 RXC 79
93
RX2
95
80
97 RXD 78
100
RX1
98
77
T4000 (DTE)
RX1
RX2
TX3
TX2
TX1
T4000 (DCE)
100
RXD
93
RXC
84
TXC
82
SCTE
75
TXD
HDLC (R)
Normal
Echo Mode
3 Clocks
2 Clocks
1 Clock (X.21)
No Loopback
Loopback
No Invert
Invert
Input Pin Settings (Scenario 20)
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
1
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
0
1
1
1
Rev. 1.00
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