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Module 2: The 8051 Architecture

20247m

Write short notes on: Register IE format of 8051

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Short Notes: Register IE Format (8051)

IE (A8H) bit-addressable:
7 EA – Global enable (1=enable all)
6 – unused
5 – unused
4 ES – Serial interrupt enable
3 ET1 – Timer1 enable
2 EX1 – INT1 enable
1 ET0 – Timer0 enable
0 EX0 – INT0 enable

Set 1 to enable, 0 disable. Example MOV IE,#10001101B enables serial, timer0, INT0 globally.

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