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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: 65/106頁
文件大小: 428K
代理商: W6691
Preliminary W6691
Publication Release Date: Sep 2001
65 Revision 1.1
Setting the bit to "1" masks the corresponding interrupt source in D_EXIR register. Masked interrupt status
bits are read as zero. They are internally stored and pending until the mask bits are zero.
Note:
All the interrupts in D_EXIR will be masked if the IMASK:D_EXI bit is set to "1".
8.7.9 D_ch Transmitter Status Register
D_XSTA
Read
Address 0AH
Value after reset: 00H
7
6
5
4
3
2
1
0
XDOW
0
XBZ
0
0
0
0
0
XDOW Transmit Data Overwritten
At least one byte of data has been overwritten in the D_XFIFO. This bit is set by data overwritten condition
and is cleared only by XRST command.
XBZ Transmitter Busy
This bit indicates the D_HDLC transmitter is busy. The XBZ bit is set to”1” from the transmission of opening
flag to the transmission of closing flag.
8.7.10 D_ch Receive Status Register
D_RSTA
Read
Address 0BH
Value after reset: 20H
7
6
5
4
3
2
1
0
0
RDOV
CRCE
RMB
0
0
0
0
RDOV Receive Data Overflow
A "1" indicates that the D_RFIFO is overflow. The incoming data will overwrite data in the receive FIFO. The
data overflow condition will set both the status and interrupt bits.
It is recommended that software must read
the RDOV bit after reading data from D_RFIFO when RMR or RME interrupt occurs.
The software must
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