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XR88C681 Datasheet, PDF (89/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART) | |||
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XR88C681
Bit 7
BRG Set
Select
J
J
Bit 6
Bit 5
Bit 4
Counter/Timer #1 Mode and Source
Table 7
Bit 3
Delta IP3
Interrupt
J
J 7
Bit 2
Delta IP2
Interrupt
J
J 7
Table 35. Auxiliary Control Register: ACR
Bit 1
Delta IP1
Interrupt
J
J 7
Bit 7
Delta IP3
J 7
J G%
Bit 6
Delta IP2
J 7
J G%
Bit 5
Delta IP1
J 7
J G%
Bit 4
Delta IP0
J 7
J G%
Bit 3
IP3
J 9
J 8(-
Bit 2
IP2
J 9
J 8(-
Table 36. Input Port Configuration Register , IPCR
Bit 1
IP1
J 9
J 8(-
Bit 7
Input Port
Change
J 7
J G%
Bit 6
Delta Break
B
J 7
J G%
Bit 5
RXRDY/
FFULLB
J 7
J G%
Bit 4
TXRDYB
J 7
J G%
Bit 3
Counter #1
Ready
J 7
J G%
Bit 2
Delta Break
A
J 7
J G%
Table 37. Interrupt Status Register, ISR
Bit 1
RXRDY/
FFULLA
J 7
J G%
Bit 7
Input Port
Change
J ++
J
Bit 6
Delta Break
B
J ++
J
Bit 5
RXRDY/
FFULLB
J ++
J
Bit 4
TXRDYB
J ++
J
Bit 3
Counter #1
Ready
J ++
J
Bit 2
Delta Break
A
J ++
J
Table 38. Interrupt Mask Register, IMR
Bit 1
RXRDY/
FFULLA
J ++
J
Bit 7
.6
Bit 6
.<
Bit 5
.1
Bit 4
.
Bit 3
.
Bit 2
.
Table 39. Counter/Timer Upper Byte Register, CTUR
Bit 1
.
Bit 7
.>
Bit 6
./
Bit 5
.6
Bit 4
.<
Bit 3
.1
Bit 2
.
Table 40. Counter/Timer Lower Byte Register, CTLR
Bit 1
.
Bit 7
#;>
Bit 6
#;/
Bit 5
#;6
Bit 4
#;<
Bit 3
#;1
Bit 2
#;
Table 41. Interrupt Vector Register: IVR
Bit 1
#;
=
Bit 0
Delta IP0
Interrupt
J
J 7
Bit 0
IP0
J 9
J 8(-
Bit 0
TXRDYA
J 7
J G%
Bit 0
TXRDYA
J ++
J
Bit 0
.=
Bit 0
.
Bit 0
#;
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