xr68c681 Exar Corporation, xr68c681 Datasheet - Page 17

• Manufacturer Part Number: xr68c681
• Description: Cmos Dual Channel Uart Duart
• Manufacturer: Exar Corporation

ISR[7]: Input Port Change of State:


Section E
ISR[6] Delta Break Indicator - Channel B:
Input Port
Change
Bit 7
Delta Break
Bit 6
B
Table 5. Interrupt Status Register - (ISR) Bit Format
FFULLB
RXRDY/
Bit 5
Section G.2
TXRDYB
Bit 4
ISR[5] RXRDYB/FFULLB - Channel B Receiver
Ready or FIFO Full
ISR[4] TXRDYB - Channel B Transmitter Ready
Counter
Ready
Bit 3
Delta Break
Bit 2
A
XR68C681
FFULLA
RXRDY/
Bit 1
TXRDYA
Bit 0