xr68c681 Exar Corporation, xr68c681 Datasheet - Page 18
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xr68c681
Manufacturer Part Number
xr68c681
Description
Cmos Dual Channel Uart Duart
Manufacturer
Exar Corporation
Datasheet
1.XR68C681.pdf
(75 pages)
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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