XR68C681CJ EXAR [Exar Corporation], XR68C681CJ Datasheet - Page 64

• Manufacturer Part Number: XR68C681CJ
• Description: CMOS Dual Channel UART (DUART)
• Manufacturer: EXAR [Exar Corporation]

XR68C681
Input Port
Input Port
Change
Change
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Delta Break
Delta Break
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
B
B
Table 30. Counter/Timer Upper Byte Register, CTUR
Table 31. Counter/Timer Lower Byte Register, CTLR
FFULLB
FFULLB
RXRDY/
RXRDY/
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
Table 32. Interrupt Vector Register: IVR
Table 28. Interrupt Status Register, ISR
Table 29. Interrupt Mask Register, IMR
TXRDYB
TXRDYB
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
Counter #1
Counter #1
Ready
Ready
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Delta Break
Delta Break
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
A
A
FFULLA
FFULLA
RXRDY/
RXRDY/
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
TXRDYA
TXRDYA
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0