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4289A–8051–09/03<br />
Table 49. IPL0 Register<br />
IPL0 - Interrupt Priority Register (B8h)<br />
Reset Value = X000 0000b<br />
Bit addressable<br />
<strong>AT89C51ID2</strong><br />
7 6 5 4 3 2 1 0<br />
- PPCL PT2L PSL PT1L PX1L PT0L PX0L<br />
Bit<br />
Number<br />
7 -<br />
Bit<br />
Mnemonic Description<br />
6 PPCL<br />
5 PT2L<br />
4 PSL<br />
3 PT1L<br />
2 PX1L<br />
1 PT0L<br />
0 PX0L<br />
Reserved<br />
The value read from this bit is indeterminate. Do not set this bit.<br />
PCA interrupt Priority bit<br />
Refer to PPCH for priority level.<br />
Timer 2 overflow interrupt Priority bit<br />
Refer to PT2H for priority level.<br />
Serial port Priority bit<br />
Refer to PSH for priority level.<br />
Timer 1 overflow interrupt Priority bit<br />
Refer to PT1H for priority level.<br />
External interrupt 1 Priority bit<br />
Refer to PX1H for priority level.<br />
Timer 0 overflow interrupt Priority bit<br />
Refer to PT0H for priority level.<br />
External interrupt 0 Priority bit<br />
Refer to PX0H for priority level.<br />
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