Datasheet

32
3286P–MICRO–3/10
AT89S8253
.
Figure 15-1. Interrupt Sources
Table 15-3.
IPH – Interrupt Priority High Register
IPH = B7H Reset Value = XX00 0000B
Not Bit Addressable
– – PT2H PSH PT1H PX1H PT0H PX0H
Bit76543210
Symbol Function
PT2H Timer 2 Interrupt Priority High
PSH Serial Port Interrupt Priority High
PT1H Timer 1 Interrupt Priority High
PX1H External Interrupt 1 Priority High
PT0H Timer 0 Interrupt Priority High
PX0H External Interrupt 0 Priority High