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(3) Priority specify flag registers (PR0L, PR0H)
The priority specify flag is used to set the corresponding maskable interrupt priority orders.
PR0L and PR0H are set with a 1-bit or 8-bit memory manipulation instruction. When PR0L and PR0H are used
together as a 16-bit register PR0, they are set with a 16-bit memory manipulation instruction.
RESET input sets these registers to FFH.
Symbol
<7>
PR0L
TMPR3 CSIPR1 CSIPR0 PPR3
7
PR0H
1
Cautions 1. When a watchdog timer is used in the watchdog timer mode 1, set the TMPR4 flag to 1.
2. Be sure to set bits 4 to 7 of PR0H to 1.
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CHAPTER 18 INTERRUPT FUNCTIONS AND TEST FUNCTION
Figure 18-4. Priority Specify Flag Register Format
<6>
<5>
<4>
<3>
PPR2
6
5
4
<3>
1
1
1
ADPR TMPR2 TMPR1 TMPR0
<2>
<1>
<0>
Address
PPR1
PPR0 TMPR4
FFE8H
<2>
<1>
<0>
FFE9H
××PR
0
1
When Reset
R/W
FFH
R/W
FFH
R/W
Priority Level Selection
High priority level
Low priority level
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