XRT4000 Datasheet, PDF (30/46 Pages) Exar Corporation – Universal Multiprotocol Serial Interface

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