XR68C681CJ EXAR [Exar Corporation], XR68C681CJ Datasheet - Page 17
XR68C681CJ
Manufacturer Part Number
XR68C681CJ
Description
CMOS Dual Channel UART (DUART)
Manufacturer
EXAR [Exar Corporation]
Datasheet
1.XR68C681CJ.pdf
(75 pages)
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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