w6692 Winbond Electronics Corp America, w6692 Datasheet - Page 80

• Manufacturer Part Number: w6692
• Description: Pci Bus Isdn S/t-controller
• Manufacturer: Winbond Electronics Corp America

XDUN
and send the inter frame time fill pattern on B channel. The software must wait until transmit FIFO ready condition (via XFR
interrupt), re-write data, and issue XMS command to re-transmit the data.
8.2.6 B1_ch Extended Interrupt Mask Register B1_EXIM
Value after reset: FFH
zero when B1_EXIR register is read. They are internally stored and pending until the mask bits are zero.
8.2.7 B1_ch Status Register B1_STAR
Value after reset: 20H
RDOV
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 at RMR or RME interrupt. The software must abort the data and issue a RRST command to reset the receiver if
RDOV=1.
CRCE
RMB
B1_HDLC receiver. Software must issue RRST command to reset the receiver.
command
Setting the bit to "1" masks the corresponding interrupt source in B1_EXIR register. Masked interrupt status bits are read as
This interrupt occurs when the B1_XFIFO has run out of data. In this case, the W6692 will automatically reset the transmitter
All the interrupts in B1_EXIR will be masked if the IMASK : B1_EXI bit is set to "1".
Used in transparent mode only. This bit indicates the result of frame CRC check:
A "1" indicates that the D_RFIFO is overflow. The incoming data will overwrite data in the receive FIFO. The overflow
Used in transparent mode only. A "1" means that a sequence of seven 1's was received and the frame is aborted by the
Note : Bits CRCE and RMB are valid only after a RME interrupt and remain valid until the frame is acknowledged via RACK
0 : CRC correct
1 : CRC incorrect
7
7
Receive Message Aborted
CRC Error
Transmit Data Underrun
Receive Data Overflow
RDOV
RMR
6
6
CRCE
RME
5
5
RDOV
RMB
4
4
3
3
Read
XDOW
2
2
-80 -
XFR
1
1
Address 98H/26H
XDUN
XBZ
0
0
Read/Write Address 94H/25H
W6692 PCI ISDN S/T-Controller
Publication Release Date:
Preliminary Data Sheet
Sep 30, 1999
Revision 0.9