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2. Interrupt enable register 1 (IENR1)
Bit
Initial value
Read/Write
7
IENTA
0
R/W
6
—
0
R/W
5
IENWP
0
R/W
4
IEN4
0
R/W
3
IEN3
0
R/W
0
IEN0
0
R/W
2
IEN2
0
R/W
1
IEN1
0
R/W
IENR1 is an 8-bit read/write register that enables or disables interrupt requests.
Bit 7: Timer A interrupt enable (IENTA)
Bit 7 enables or disables timer A overflow interrupt requests.
Bit 7
IENTA
Description
0
Disables timer A interrupt requests
(initial value)
1
Enables timer A interrupt requests
Bit 6: Reserved bit
Bit 6 is a readable/writable reserved bit. It is initialized to 0 by a reset.
Bit 5: Wakeup interrupt enable (IENWP)
Bit 5 enables or disables WKP
7
to WKP
0
interrupt requests.
Bit 5
IENWP
Description
0
Disables
WKP
7
to
WKP
0
interrupt requests
(initial value)
1
Enables
WKP
7
to
WKP
0
interrupt requests
Bits 4 to 0: IRQ
4
to IRQ
0
interrupt enable (IEN4 to IEN0)
Bits 4 to 0 enable or disable IRQ
4
to IRQ
0
interrupt requests.
Bit n
IENn
Description
0
Disables interrupt requests from pin
IRQn
(initial value)
1
Enables interrupt requests from pin
IRQn
(n = 4 to 0)