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參數(shù)資料
| 型號(hào)： | T7630 |
| 廠商： | Lineage Power |
| 英文描述： | Dual T1/E1 5.0 V Short-Haul Terminator (Terminator-II)(雙 T1/E1 5.0V短距離通信終端器) |
| 中文描述： | 雙T1/E1的5.0V的短途終結(jié)者（終結(jié)者-Ⅱ）（雙個(gè)T1/E1 5.0V短距離通信終端器） |
| 文件頁(yè)數(shù)： | 47/210頁(yè) |
| 文件大?。?/td> | 3075K |
| 代理商： | T7630 |
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Lucent Technologies Inc.
47
Preliminary Data Sheet
October 2000
T7630 Dual T1/E1 5.0 V Short-Haul Terminator (Terminator II)
LIU-Framer Interface
(continued)
Figure 19 shows the timing requirements for the transmit and receive framer interfaces in the LIU-bypass mode.
5-4558(F).cr.3
Figure 19. Transmit Framer TLCK to TND, TPD and Receive Framer RND, RPD to RLCK Timing
162 ns
122 ns
t1-DS1
t1-CEPT
648 ns
488 ns
t1
t2r-f
t2f-r
t3
t4
t5
PLLCK
TLCK
TND, TPD
RLCK
RND, RPD
RFRMCK
t7 = RPD, RND HOLD FROM RISING RLCK = 40 ns
t6
t7
t8
t2r-f: t2f-r: PLLCK TO TLCK DELAY = 50 ns
t3-DS1 = 648 ns
t3-CEPT = 488 ns
t4 = TLCK TO VALID TPD, TND = 30 ns
t5-CEPT = 488 ns
t5-DS1 = 648 ns
t6 = RPD, RND SETUP TO RISING RLCK = 40 ns
t8r-f: t8f-r: RLCK TO RFRMCK DELAY = 50 ns
FRM_PR45 BIT 0 (HFLF)
HFLF = 0
HFLF = 1
Interface Mode and Line Encoding
Single Rail
The default mode for the LIU-framer interface is single-
rail, register LIU_REG3 bit 3 (DUAL) = 0 and register
FRM_PR8 bit 7 = 1, bit 6 = 1, and bit 5 = 0.
In the single-rail terminator mode (FRAMER = 1), the
LIU bipolar encoder and decoder may be enabled by
setting register LIU_REG3 bit 2 (CODE) to 1. Signals
passed on the internal LIU-framer interface are data
(LIU_RPD and TPD), clock (LIU_RLCK and TLCK),
and received bipolar violations (LIU_RND/BPV). When
LIU_RND/BPV = 1, the BPV counter increments by one
on the rising edge of LIU_RLCK.
In the single-rail framer mode (FRAMER = 0), external
signals to and from the framer are data (RTIP_RPD, pin
11/27 and TPD, pin 44/138), clock (RLCK, pin 47/135
and TLCK, pin 46/136), and received bipolar violations
(RRING_RND, pin 10/28). When RRING_RND = 1, the
BPV counter increments by one on the rising edge of
RLCK. In this mode, TND (pin 45/137) is forced to the 0
state.
Dual Rail
Dual-rail LIU-framer interface mode is selected by set-
ting LIU_REG3 bit 3 (DUAL) = 1 and by selecting one
of the dual-rail framer modes of FRM_PR8 bit 5—bit 7.
In the dual-rail terminator mode (FRAMER = 1), the
framer bipolar encoder and decoder are enabled. Sig-
nals passed on the internal LIU-framer interface are
data (LIU_RPD, LIU_RND, TPD, and TND), and clock
(LIU_RLCK and TLCK). When bipolar violations are
detected by the framer, the BPV counter increments by
one on the rising edge of LIU_RLCK.
In the dual-rail framer mode (FRAMER = 0), external
signals to and from the framer are data (RTIP_RPD, pin
11/27; RRING_RND, pin 10/28; TPD, pin 44/138; and
TND, pin 45/137) and clock (RLCK, pin 47/135 and
TLCK, pin 46/136). When bipolar violations are
detected by the framer, the BPV counter increments by
one on the rising edge of RLCK.
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