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參數(shù)資料
| 型號： | T7264 |
| 英文描述： | T7264 U-Interface 2B1Q Transceiver |
| 中文描述： | T7264 U型接口2B1Q收發(fā)器 |
| 文件頁數(shù)： | 28/54頁 |
| 文件大小： | 876K |
| 代理商： | T7264 |
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28
Lucent Technologies Inc.
Data Sheet
April 1998
T7264 U-Interface 2B1Q Transceiver
K2 Functional Description
(continued)
5-5178a
Figure 19. T7264 nebe/febe/crc Block Diagram
5-5179a
Figure 20. Use of rfebe in a Multilink Configuration
NT or LT Operation
The MODE0 pin determines whether the device is being used in an LT system as the originator of the U-interface
signals or in the NT mode as the terminator of the U-interface signal. Table 21 is provided as a reference to show
the different functions of the chip in NT and LT modes.
Table 21. MODE0 Pin Functionality
LT (MODE0 = 1)
NT (MODE0 = 0)
U-interface timing derived from MTC
Transmit adea AND ldea for dea, uoa, aib
U transmit-to-receive timing dependent upon line delay
ldea stops transmission
LT scrambling algorithm
LT start-up timing
TL tone generation
TN tone recognition
K2 timing derived from the U-interface
Transmit ps1, ps2, ntm, cso, sai, nib
U transmit-to-receive timing fixed at 0.75 ms
Loss of signal stops transmission
NT scrambling algorithm
NT start-up timing
TN tone generation
TL tone recognition
K2 INTERFACE
nebe
MODE1
rfebe
crc
CHECKER
febe
U-INTERFACE
T7264
PIN #11
2B+D+M
ccrc
febe
NT
T7264 (NT)
crc
GENERATOR
T7264 (LT)
crc
CHECKER
nebe
+V
rfebe
MODE1 = 0
crc
GENERATOR
ccrc
febe
T7264 (LT)
crc
CHECKER
nebe
+V
rfebe
K2 INTERFACE
LOGIC
2B+D+M
T7264 (NT)
U-
INTER-
FACE
febe
2B+D+M
MODE1 = 1
rfebe = 1
LT
febe
INTERMEDIATE ELEMENT
U-
INTER-
FACE
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