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參數資料
型號: W6691
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Transceiver
中文描述: 綜合業務數字網的S / T接口收發器
文件頁數: 41/106頁
文件大小: 428K
代理商: W6691
Preliminary W6691
Publication Release Date: Sep 2001
41 Revision 1.1
Fig.7.9 SSP and SCP test signals
7.3 B Channel Switching
W6691 provides five kinds of B channel switching function.
1. PCM and GCI bus Switch (SFCTL : PGSWH) :
It determines the CODEC interface is to be operated in B channel.
1: PCM bus is selected to operate with CODEC.
0: GCI bus is selected to operate with CODEC.
2. PCM Remote Loop Back (SFCTL : PCRLP)
Setting this bit activates the PCM channel remote loopback function. The transmitted PCM data to
PCM channel are looped to received PCM channel.
3. PXC PCM Cross-connect (SCFT : PXC)
This bit determines whether or not the PCM ports are cross-connected with the B channel ports. The setting of
PXC is independent of the BSW1-0 bits.
250 us
(a) Single pulses
(b) Continuous pulses
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