w6691 Winbond Electronics Corp America, w6691 Datasheet - Page 69
w6691
Manufacturer Part Number
w6691
Description
Isdn S/t Interface Transceiver
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W6691.pdf
(106 pages)
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8.7.17 D_ch Receive Frame Byte Count High
Value after reset: 40H
VN1-0
LOV
after a D_RME interrupt and remains valid until the frame is acknowledge via the RACK command.
RBC12-8
These bits are five most significant bits of the total frame length. These bits are valid only after a D_RME
interrupt and remain valid until the frame is acknowledge via the RACK command.
8.7.18 D_ch Receive Frame Byte Count Low
Value after reset: 00H
RBC7-0
These bits are eight least significant bits of the total frame length. Bits RBC4-0 also indicate the length of the
data currently available in D_RFIFO. These bits are valid only after an D_RME interrupt and remain valid until
the frame is acknowledged via the RACK command.
RBC7
This is the chip version number. It is read as 01B.
A "1" in this bit indicates
VN1
7
7
Length Overflow
Chip Version Number
RBC6
VN0
Receive Byte Count
6
6
Receive Byte Count
RBC5
LOV
5
5
8192 bytes are received and the frame is not yet complete. This bit is valid only
RBC12 RBC11 RBC10
RBC4
4
4
RBC3
3
3
RBC2
2
2
69
D_RBCH
D_RBCL
RBC9
RBC1
1
1
RBC8
RBC0
0
0
Read
Read Address 16H
Preliminary W6691
Publication Release Date: Sep 2001
Address 17H
Revision 1.1
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