Priority Specify Flag Register Format - NEC PD78081(A) User Manual

(3) Priority specify flag registers (PR0L, PR0H, and PR1L)
The priority specify flag is used to set the corresponding maskable interrupt priority orders.
PR0L, PR0H, and PR1L are set with a 1-bit or 8-bit memory manipulation instruction. If PR0L and PR0H are
used as a 16-bit register PR0, use a 16-bit memory manipulation instruction for the setting.
RESET input sets these registers to FFH.
Symbol 7 6
PR0L 1 1
7 6
PR0H 1 1
7 6
PR1L 1 1
Cautions 1. If a watchdog timer is used in watchdog timer mode 1, set TMPR4 flag to 1.
2. Set 1 to the bits 1, 5 to 7 of PR0L and bits 0, 1, 5 to 7 of PR0H and PR1L.
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CHAPTER 12 INTERRUPT FUNCTION
Figure 12-4. Priority Specify Flag Register Format
5 4 3 2
1 PPR3 PPR2 PPR1
5 4 3 2
1 STPR SRPR SERPR
5 4 3 2
1 TMPR6 TMPR5 ADPR
Address
1 0
FFE8H
1 TMPR4
1 0
FFE9H
1 1
1 0
1 1 FFEAH
PR
0 High priority level
1 Low priority level
After
R/W
Reset
FFH R/W
FFH R/W
FFH R/W
Priority Level Selection