T7234A 데이터 시트보기 (PDF) - Agere -> LSI Corporation
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T7234A Datasheet PDF : 116 Pages
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Data Sheet
January 1998
T7256 Single-Chip NT1 (SCNT1) Transceiver
U-Interface Frame Structure (continued)
Bit #
Frame #
1
2
3
4
5
6
7
8
1—18
19—234
235
236
237
Sync
12(2B+D)
M1
M2
M3
ISW
eoc1
2B+D
SW
eoc2
238
239
240
M4
M5
M6
CONTROL & STATUS (UCS)
crc
Figure 5. U-Interface Superframe Bit Groups
Bit Assignments
Table 2. U-Interface Bit Assignment
Bit #
Frame #
1
2
3
4
5
6
7
8
1—18
Sync
ISW
SW
SW
SW
SW
SW
SW
SW
19—234
12(2B+D)
2B+D
2B+D
2B+D
2B+D
2B+D
2B+D
2B+D
2B+D
235
M1
eoca1
eocdm
eoci3
eoci6
eoca1
eocdm
eoci3
eoci6
236
M2
eoca2
eoci1
eoci4
eoci7
eoca2
eoci1
eoci4
eoci7
* LT(NT). Values in parentheses () indicate meaning at the NT.
† cso is fixed at 0 by the device to indicate both cold and warm start capability.
‡ nib is fixed at 1 by the device to indicate the link is normal.
237
M3
eoca3
eoci2
eoci5
eoci8
eoca3
eoci2
eoci5
eoci8
238
M4
act
dea (ps1)*
R3, 4 (ps2)*
R4, 4 (ntm)*
R5, 4 (cso)*†
R6, 4
uoa (sai)*
aib (nib)*‡
239
M5
R1, 5
R2, 5
crc1
crc3
crc5
crc7
crc9
crc11
240
M6
R1, 6
febe
crc2
crc4
crc6
crc8
crc10
crc12
Lucent Technologies Inc.
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