at89s8253-24psu ATMEL Corporation, at89s8253-24psu Datasheet - Page 32

• Manufacturer Part Number: at89s8253-24psu
• Description: At89s8253 8-bit Microcontroller With 12k Bytes Flash And 2k Bytes Eeprom
• Manufacturer: ATMEL Corporation

Table 15-2.
Table 15-3.
Figure 15-1. Interrupt Sources
32
Symbol
PT2
PS
PT1
PX1
PT0
PX0
Symbol
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
IP = B8H
Bit Addressable
Bit
IPH = B7H
Not Bit Addressable
Bit
AT89S8253
Function
Timer 2 Interrupt Priority Low
Serial Port Interrupt Priority Low
Timer 1 Interrupt Priority Low
External Interrupt 1 Priority Low
Timer 0 Interrupt Priority Low
External Interrupt 0 Priority Low
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
IP
IPH
– Interrupt Priority Register
–
7
–
7
– Interrupt Priority High Register
.
–
6
–
6
PT2H
PT2
5
5
PSH
PS
4
4
PT1H
PT1
3
3
PX1H
PX1
2
2
Reset Value = XX00 0000B
Reset Value = XX00 0000B
PT0H
PT0
1
1
3286K–MICRO–12/06
PX0H
PX0
0
0