C501G-1E SIEMENS [Siemens Semiconductor Group], C501G-1E Datasheet - Page 84

• Manufacturer Part Number: C501G-1E
• Description: 8-Bit Single-Chip Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

7.1.3 Interrupt Priority Register
Each interrupt source can also be individually programmed to one of two priority levels by setting or
clearing a bit in the SFR IP (Interrupt Priority, 0: low priority, 1: high priority).
Special Function Register IP (Address B8 H )
Bit
–
PT2
PS
PT1
PX1
PT0
PX0
Semiconductor Group
Bit No.
B8 H
The shaded bits are not used for interrupt control.
MSB
–
7
Function
Not implemented. Reserved for future use.
Timer 2 Interrupt Priority Level.
If PT2 = 0, the Timer 2 interrupt has a low priority.
Serial Channel Interrupt Priority Level.
If PS = 0, the Serial Channel interrupt has a low priority.
Timer 1 Overflow Interrupt Priority Level.
If PT1 = 0, the Timer 1 interrupt has a low priority.
External Interrupt 1 Priority Level.
If PX1 = 0, the external interrupt 1 has a low priority.
Timer 0 Overflow Interrupt Priority Level.
If PT0 = 0, the Timer 0 interrupt has a low priority.
External Interrupt 0 Priority Level.
If PX0 = 0, the external interrupt 0 has a low priority.
–
6
PT2
5
PS
4
7-6
PT1
3
PX1
2
PT0
1
Reset Value : XX000000 B
Interrupt System
PX0
LSB
0
IP
C501