W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 60
W6691CD
Manufacturer Part Number
W6691CD
Description
ISDN S/T Interface Transceiver
Manufacturer
WINBOND [Winbond]
Datasheet
1.W6691CD.pdf
(106 pages)
- Current page: 60 of 106
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XMS
the HDLC controller. Writing “0” to this bit has no effect. If XMS bit is set to “1” for operating “Transmit
Message Start/Continue”, It is not necessary to reset XMS bit to “0” by host processor. That is to say, once
XMS is set to “1”, XMS bit is reset to “0” by W6691 automatically.
XME Transmit Message End
the CRC and the closing flag after the data transmission. Writing “0” to this bit has no effect. If XME bit is set to
“1” for operating “Transmit Message End”, It is not necessary to reset XME bit to “0” by host processor. That is
to say, once XME is set to “1”, XME bit is reset to “0” by W6691 automatically.
Note: If the frame
XRST Transmitter Reset
frame time fill pattern (which is 1's) immediately. This command also results in a transmit FIFO ready
condition. Writing “0” to this bit has no effect. If XRST bit is set to “1” for operating “Transmit Reset”, It is not
necessary to reset XME bit to “0” by host processor. That is to say, once XRST is set to “1”, XRST bit is reset
to “0” by W6691 automatically.
8.7.4 D_ch Mode Register D_MODE
Value after reset : 00H
RACT
in order to receive data.
Note: The receiver is deactive after hardware reset or software reset.
Setting this bit will start or continue the transmission of a frame. The opening flag is automatically added by
Setting this bit indicates the end of frame transmission. The D_ch HDLC controller automatically appends
Setting this bit resets the D_ch HDLC transmitter and clears the D_XFIFO. The transmitter will send inter
Setting this bit activates the D_ch HDLC receiver. This bit can be read. The receiver must be in active state
7
0
Transmit Message Start/Continue
Receiver Active
RACT
6
32 bytes, XME plus XMS commands must be issued at the same time.
XACT
5
4
0
S_RLPD
3
Read/Write
MFD
2
60
L2_DLP S_RLP
1
Address 03H
0
Preliminary W6691
Publication Release Date: Sep 2001
Revision 1.1
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