T9000
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
7 Transmission Superblock (continued)
7.6 DFAC Register Set (continued)
Table 28. ECR0: EOC Control Register 0—Command and Address (0x0B)
Reg
R/W
Bit 7
CCRC
0
Bit 6
LD
0
Bit 5
LB2
0
Bit 4
LB1
0
Bit 3
A1T
0
Bit 2
A2T
0
Bit 1
A3T
0
Bit 0
DMT
1
ECR0
R/W
RESET Default
Bit # Symbol
Name/Description
Corrupt Cyclic Redundancy Check. Used to corrupt the CRC information transmitted to the
far end. This value is ORed with the CCRC control output generated by the EOC state machine
(see ECCRC bit in register ESR0).
7
6
5
4
CCRC
0: CRC is generated correctly.
1: CRC is corrupted.
U-Interface D-Channel Loopback Control. Implements a D-channel loopback. This value is
ORed with the 2B+D loopback control output generated by the EOC state machine (see
ELBK2 bit in register ESR0).
LD
0: No loopback.
1: D-channel transparent loopback from U-interface receiver to transmitter.
U-Interface B2-Channel Loopback Control. Implements a B2-channel loopback. This value
is ORed with the 2B+D and B2 loopback control outputs generated by the EOC state machine
(see ELBK2 and ELB2 bits in register ESR0).
LB2
LB1
0: No loopback.
1: B2-channel transparent loopback from U-interface receiver to transmitter.
U-Interface B1-Channel Loopback Control. Implements a B1-channel loopback. This value
is ORed with the 2B+D and B1 loopback control outputs generated by the EOC state machine
(see ELBK2 and ELB1 bits in register ESR0).
0: No loopback.
1: B1-channel transparent loopback from U-interface receiver to transmitter.
Transmit EOC Address. These bits are transmitted as the EOC channel address when in
manual EOC mode. They have no effect when in AUTOEOC mode. A1T is the first bit
transmitted.
3—1 A[1:3]T
000: NT address.
111: Broadcast address.
Transmit EOC Data or Message Indicator. This bit is transmitted as the EOC channel
data/message indicator when in manual EOC mode. It has no effect when in AUTOEOC mode.
I1T is the first bit transmitted.
0
DMT
0: Data.
1: Message.
38
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