Interrupts
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IEN0 (0xA8) – Interrupt Enable 0
Bit Name Reset R/W Description
7
EA
0 R/W Disables all interrupts.
0: No interrupt is acknowledged.
1: Each interrupt source is individually enabled or disabled by setting its
corresponding enable bit.
6 – 0 R0 Reserved. Read as 0
5
STIE
0 R/W Sleep Timer interrupt enable
0: Interrupt disabled
1: Interrupt enabled
4
ENCIE
0 R/W AES encryption/decryption interrupt enable
0: Interrupt disabled
1: Interrupt enabled
3
URX1IE
0 R/W USART 1 RX interrupt enable
0: Interrupt disabled
1: Interrupt enabled
2
URX0IE
0 R/W USART0 RX interrupt enable
0: Interrupt disabled
1: Interrupt enabled
1
ADCIE
0 R/W ADC interrupt enable
0: Interrupt disabled
1: Interrupt enabled
0
RFERRIE
0 R/W RF core error interrupt enable
0: Interrupt disabled
1: Interrupt enabled
IEN1 (0xB8) – Interrupt Enable 1
Bit Name Reset R/W Description
7:6 – 00 R0 Reserved. Read as 0
5
P0IE
0 R/W Port 0 interrupt enable
0: Interrupt disabled
1: Interrupt enabled
4
T4IE
0 R/W Timer 4 interrupt enable
0: Interrupt disabled
1: Interrupt enabled
3
T3IE
0 R/W Timer 3 interrupt enable
0: Interrupt disabled
1: Interrupt enabled
2
T2IE
0 R/W Timer 2 interrupt enable
0: Interrupt disabled
1: Interrupt enabled
1
T1IE
0 R/W Timer 1 interrupt enable
0: Interrupt disabled
1: Interrupt enabled
0
DMAIE
0 R/W DMA transfer interrupt enable
0: Interrupt disabled
1: Interrupt enabled
46
8051 CPU SWRU191C–April 2009–Revised January 2012
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