xr68c681 Exar Corporation, xr68c681 Datasheet - Page 64
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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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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