AT89S8253_09 Datasheet, PDF (32/60 Pages) ATMEL Corporation – 8-bit Microcontroller with 12K Bytes Flash

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Table 15-3. IPH – Interrupt Priority High Register
IPH = B7H
Not Bit Addressable
–
–
PT2H
Bit
7
6
5
Symbol
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Function
Timer 2 Interrupt Priority High
Serial Port Interrupt Priority High
Timer 1 Interrupt Priority High
External Interrupt 1 Priority High
Timer 0 Interrupt Priority High
External Interrupt 0 Priority High
Figure 15-1. Interrupt Sources
PSH
4
PT1H
3
Reset Value = XX00 0000B
PX1H
2
PT0H
1
PX0H
0
32 AT89S8253
3286M–MICRO–10/09