C505_9708 SIEMENS [Siemens Semiconductor Group], C505_9708 Datasheet - Page 183

• Manufacturer Part Number: C505_9708
• Description: 8-Bit CMOS Microcontroller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

7.1.3 Interrupt Priority Registers
The lower six bits of these two registers are used to define the interrupt priority level of the interrupt
groups as they are defined in table 7-1 in the next section.
Special Function Register IP0 (Address A9 H )
Special Function Register IP1 (Address B9 H )
Bit
IP1.x
IP0.x
–
Semiconductor Group
Bit No.
Bit No.
B9 H
A9 H
OWDS WDTS
MSB
–
7
7
The shaded bits are not used for interrupt control.
Function
Interrupt group priority level bits (x=0-5, see table 7-1)
Reserved bits for future use. Read by CPU returns undefined values.
IP1.x
0
0
1
1
–
6
6
IP1.5
IP0.5
IP0.x
0
1
0
1
5
5
IP1.4
IP0.4
4
4
Function
Interrupt group x is set to priority level 0 (lowest)
Interrupt group x is set to priority level 1
Interrupt group x is set to priority level 2
Interrupt group x is set to priority level 3 (highest)
7-12
IP1.3
IP0.3
3
3
IP1.2
IP0.2
2
2
IP1.1
IP0.1
1
1
Reset Value : XX000000 B
IP1.0
IP0.0
LSB
Interrupt System
0
0
Reset Value : 00 H
C505 / C505C
IP1
IP0
1997-08-01