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參數(shù)資料
型號(hào): W6691
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Transceiver
中文描述: 綜合業(yè)務(wù)數(shù)字網(wǎng)的S / T接口收發(fā)器
文件頁(yè)數(shù): 100/106頁(yè)
文件大小: 428K
代理商: W6691
Preliminary W6691
Publication Release Date: Sep 2001
100 Revision 1.1
Detailed PCM timing
PARAMETER
ta1
ta2
ta3
PARAMETER DESCRIPTIONS
PBCK pulse high
PBCK pulse low
Frame clock asserted from
PBCK
PTXD data delay from PBCK
Frame clock deasserted from
PBCK
PTXD hold time from PBCK
PRXD setup time to PBCK
PRXD hold time from PBCK
MIN.
195
NOMINAL
325
325
MAX.
455
20
REMARKS
Unit = nS
ta4
ta5
20
20
ta6
ta7
ta8
10
20
10
Note : The PCM clocks are locked to the S/T receive clock. At every two or three PCM frame time (125
μ
s),
PBCK and PFCK1, PFCK2 may be adjusted by one local oscillator cycle (130 ns) in order to synchronize with
S/T clock. This shift is made on the LOW level time of PBCK and the HIGH level time is not affected. This
introduces jitters on the PBCK, PFCK1 and PFCK2 with jitter amplitude 260 ns (peak-to-peak) and jitter
frequency about 2.67~4 kHz.
PBCK
PFCK1
PFCK2
PTXD
PRXD
ta1
ta2
ta3
ta4
ta5
ta6
ta7
ta8
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