XR68C681 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XR68C681' PDF : 75 Pages View PDF
XR68C681
Bit 7
Input Port
Change
J 8
J E %
Bit 6
Delta Break
B
J 8
J E %
Bit 5
RXRDY/
FFULLB
J 8
J E %
Bit 4
TXRDYB
J 8
J E %
Bit 3
Counter #1
Ready
J 8
J E %
Bit 2
Delta Break
A
J 8
J E %
Bit 1
RXRDY/
FFULLA
J 8
J E %
Table 28. Interrupt Status Register, ISR
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
Bit 1
RXRDY/
FFULLA
J ++
J
Table 29. Interrupt Mask Register, IMR
Bit 7
.6
Bit 6
.=
Bit 5
.1
Bit 4
.
Bit 3
.
Bit 2
.
Table 30. Counter/Timer Upper Byte Register, CTUR
Bit 1
.
Bit 7
.@
Bit 6
./
Bit 5
.6
Bit 4
.=
Bit 3
.1
Bit 2
.
Table 31. Counter/Timer Lower Byte Register, CTLR
Bit 1
.
Bit 7
#;@
Bit 6
#;/
Bit 5
#;6
Bit 4
#;=
Bit 3
#;1
Bit 2
#;
Table 32. Interrupt Vector Register: IVR
Bit 1
#;
Bit 0
TXRDYA
J 8
J E %
Bit 0
TXRDYA
J ++
J
Bit 0
.<
Bit 0
.
Bit 0
#;
/=
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