W66910 Datasheet, PDF (52/81 Pages) Winbond – TE Mode ISDN S/T-Controller with Microprocessor Interface

Data Sheet
W66910 PCI ISDN S/T-Controller
TA27 TA26 TA25 TA24 TA23 TA22 TA21 TA20
TA27 - TA20
This register contains the second choice of the second byte address of received frame. For LAPD frame, TA27 - TA21 is the TEI
value, TA20 is EA = 1.
8.1.18 D_ch Receive Frame Byte Count High D_RBCH Read Address 11H
Value after reset: 40H
7
6
5
4
3
2
1
0
VN1 VN0 LOV RBC12 RBC11 RBC10 RBC9 RBC8
VN1-0 Chip Version Number
This is the chip version number. It is read as 01B.
LOV Length Overflow
A "1" in this bit indicates ≥ 8192 bytes are received and the frame is not yet complete. This bit is valid only after an D_RME
interrupt and remains valid until the frame is acknowledge via the RACK command.
RBC12-8 Receive Byte Count
Four most significant bits of the total frame length. These bits are valid only after an D_RME interrupt and remain valid until the
frame is acknowledge via the RACK command.
8.1.19 D_ch Receive Frame Byte Count Low D_RBCL Read
Address 12H
Value after reset: 00H
7
6
5
4
3
2
1
0
RBC7 RBC6 RBC5 RBC4 RBC3 RBC2 RBC1 RBC0
RBC7-0 Receive Byte Count
Eight least significant bits of the total frame length. Bits RBC5-0 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.
8.1.20 Timer 2
TIMR2 Write Address 13H
Value after reset : 00H
7
6
5
4
3
2
1
0
TMD TIDLE TCN5 TCN4 TCN3 TCN2 TCN1 TCN0
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Publication Release Date: Feb,2001
Revision 1.0