XRT4000 Datasheet, PDF (42/46 Pages) Exar Corporation – Universal Multiprotocol Serial Interface

XRT4000
Scenario 17 & 18
TXD
SCTE
75
TX1
82
TX2
78
TXD
97
77
98
79
96
80
95
RX1
RX2
100
RXD
93
RXC
TXC
RXC
RXD
HDLC (L)
Options
DTE
DCE
87
90
RX3
88
87
84
88
TX3
96
RXC
79
93
RX2
95
82
80
TX2
97
RXD
78
100
RX1
98
77
75
TX1
T4000 (DTE)
T4000 (DCE)
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 (Scenario 17 & 18)
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
1
1
1
1
Rev. 1.00
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