w66910 Winbond Electronics Corp America, w66910 Datasheet - Page 65

• Manufacturer Part Number: w66910
• Description: Te Mode Isdn S/t-controller With Microprocessor Interface
• Manufacturer: Winbond Electronics Corp America

TABLE 8.4 REGISTER SUMMARY: B1 CHANNEL HDLC
8.2.1 B1_ch receive FIFO
The B1_RFIFO is a 128-byte depth FIFO memory with programmable threshold. The threshold value determines when to
generate an interrupt.
When more than a threshold length of data has been received, a RMR interrupt is generated. After an RMR interrupt, 64 or 96
bytes can be read out, depending on the threshold setting.
In transparent mode, when the end of frame has been received, a RME interrupt is generated. After an RME interrupt, the
number of bytes available is less than or equal to the threshold value.
8.2.2 B1_ch transmit FIFO
The B1_XFIFO is a 128-byte depth FIFO with programmable threshold value. The threshold setting is the same as B1_RFIFO.
Offset R/W
2A
2C
2D
2B
20
21
22
23
24
25
26
27
28
29
R
W
R/W
R/W
R_clr B1_EXIR
R/W
R
R/W
R/W
R/W
R/W
R
R
R/W
B1_RFIFO
B1_XFIFO
B1_CMDR
B1_MODE
B1_EXIM
B1_STAR
B1_ADM1
B1_ADM2
B1_ADR1
B1_ADR2
B1_RBCL
B1_RBCH
B1_IDLE
Name
RACK
MMS
MA17
MA27
RA17
RA27
RBC7
IDLE7
B1_RFIFO
7
RRST
ITF
RMR
RMR
RDOV
MA16
MA26
RA16
RA26
RBC6
IDLE6
B1_XFIFO
6
RACT
EPCM
RME
RME
CRCE
MA15
MA25
RA15
RA25
RBC5
LOV
IDLE5
5
-65 -
Read
XACTB
B1_SW1 B1_SW0 SW56
RDOV
RDOV
RMB
MA14
MA24
RA14
RA24
RBC4
RBC12
IDLE4
4
Write
B1_128K XMS
MA13
MA23
RA13
RA23
RBC3
RBC11
IDLE3
Address 20H
3
W66910 PCI ISDN S/T-Controller
XDOW
MA12
MA22
RA12
RA22
RBC2
RBC10
IDLE2
Address 21H
Publication Release Date:
2
XME
FTS1
XFR
XFR
MA11
MA21
RA11
RA21
RBC1
RBC9
IDLE1
1
XRST
FTS0
XDUN
XDUN
XBZ
MA10
MA20
RA10
RA20
RBC0
RBC8
IDLE0
Data Sheet
0
Revision 1.0
Feb,2001