W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 64

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

XDUN
transmitter and send the inter frame time fill pattern (all 1's) on D channel. The microprocessor must wait until
transmit FIFO ready (via XFR interrupt), re-write data, and issue XMS command to re-transmit the data.
XCOL
and software must wait until transmit FIFO ready (via XFR interrupt), then, re-write data, and issue XMS
command to re-transmit the data.
TIN2
GCI
ICC
T1EXP
SCC
8.7.8 D_ch Extended Interrupt Mask Register
Value after reset: FFH
RDOV
This interrupt indicates the D_XFIFO has run out of data. In this case, the W6691 will automatically reset the
This bit indicates a collision on the S-bus has been detected. W6691 will automatically reset the transmitter
This bit is set when Timer 2 counts down to zero.
This bit is set when at least one bit is set in GCI_EXIR register.
A change in the layer 1 indication code is detected. The actual value can be read from CIR registers.
Expiration occurs in the Timer 1.
A change in multi-frame S channel is detected. The actual value can be read from SQR registers.
7
Indication Channel Change
GCI Interrupt
S Channel Change
Timer 2 Expiration
Transmit Collision
Transmit Data Underrun
XDUN
Timer 1 Expiration
6
XCOL
5
TIN2
4
GCI
3
ICC
2
64
D_EXIM
T1EXP
1
SCC
0
Read/Write
Preliminary W6691
Publication Release Date: Sep 2001
Address 07
Revision 1.1
H