W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 63

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

B1_EXI
This bit indicates that at least one interrupt bit has been set in B1_EXIR register.
B2_EXI
This bit indicates that at least one interrupt bit has been set in B2_EXIR register.
8.7.6 Interrupt Mask Register
Value after reset: FFH
Setting the bit to "1" masks the corresponding interrupt source in ISTA register. Masked interrupt status bits
are read as zero. They are internally stored and pending until the mask bits are zero.
Note: Setting the D_EXI bit to "1" masks the interrupts in D_EXIR register.
8.7.7 D_ch Extended Interrupt Register
Value after reset: 00H
RDOV
incoming data will overwrite the data in the receive FIFO. If RDOV interrupt occurs, software has to reset the
receiver and discard the data received.
D_RMR
RDOV
Frame overflow (too many short frames) or data overflow occurs in the receive FIFO. In data overflow, the
7
7
Receive Data Overflow
B1_ch Extended Interrupt
B2_ch Extended Interrupt
XDUN
D_RME
6
6
XCOL
D_XFR
5
5
TIN2
4
INT1
4
IMASK Read/Write
GCI
3
D_EXIR
INT0
3
ICC
63
2
D_EXI
2
T1EXP
Address 05H
Read_clear
1
B1_EXI
SCC
1
0
Preliminary W6691
Publication Release Date: Sep 2001
Address 06H
B2_EXI
0
Revision 1.1