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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: 90/106頁
文件大小: 428K
代理商: W6691
Preliminary W6691
Publication Release Date: Sep 2001
90 Revision 1.1
XACT Transmitter Active
"0": transmitter is active, 64 KHz clock is provided.
"1": transmitter is inactive, clock is LOW to save power.
This bit is read/write. Read operation returns the previously written value.
Note:
The transmitter is deactive after hardware reset or software reset.
B1_128 128K Mode
"1": Both B1 and B2 channels in layer 1 are combined into single layer 2 channel. The layer 2 B1 channel can
operates in transparent mode or extended transparent mode and layer 2 B2 channel is not used.
"0": Both B1 and B2 channels in layer 1 are not combined.
This bit is read/write. Read operation returns the previously written value.
SW56 Switch 56 Traffic
0: The data rate in B1 channel is 64 kbps.
1: The data rate in B1 channel is 56 kbps. The most significant bit in each octet is fixed at "1".
Note
: In 56 kbps mode, only transparent mode can be used.
FTS1-0 FIFO Threshold Select
These two bits determine the B1 channel receive and transmit FIFO's threshold setting. An interrupt is
generated when the number of received data or the number of vacancies in XFIFO reaches the threshold
value.
FTS1
0
0
1
1
FTS0
0
1
0
1
Threshold (byte)
64
Reserved
96
Not allowed
8.11.5 B1_ch Extended Interrupt Register B1_EXIR
Read_clear
Address 56H
Value after reset: 00H
7
6
5
4
3
2
1
0
0
RMR
RME
RDOV
0
0
XFR
XDUN
相關PDF資料
PDF描述
W6691CD ISDN S/T Interface Transceiver
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