xr68c681 Exar Corporation, xr68c681 Datasheet - Page 18

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

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