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CHAPTER 18 INTERRUPT FUNCTIONS
User’s Manual U19780EJ2V0UD
522
(3) Priority specification flag registers (PR0L, PR0H, PR1L, PR1H)
The priority specification flag registers are used to set the corresponding maskable interrupt priority order.
PR0L, PR0H, PR1L, and PR1H are set by a 1-bit or 8-bit memory manipulation instruction. If PR0L and PR0H,
and PR1L and PR1H are combined to form 16-bit registers PR0 and PR1, they are set by a 16-bit memory
manipulation instruction.
Reset signal generation sets these registers to FFH.
Figure 18-4. Format of Priority Specification Flag Registers (PR0L, PR0H, PR1L, PR1H) (1/2)
<1> 78K0/KB2-A
Address: FFE8H After reset: FFH R/W
Symbol <7> <6> <5> 4
3 <2> <1> <0>
PR0L SREPR6
PPR5
PPR4 1
1 PPR1
PPR0
LVIPR
Address: FFE9H After reset: FFH R/W
Symbol <7> <6> <5> <4> <3> <2> <1> <0>
PR0H TMPR010
TMPR000
TMPR50
TMPRH0
TMPRH1
CSIPR10
STPR6
SRPR6
Address: FFEAH After reset: FFH R/W
Symbol <7>
<6> 5 4 <3> 2 <1>
<0>
PR1L PPR7
PPR6
1 1
TMPR51
1
IICAPR0
ADPR
Address: FFEBH After reset: FFH R/W
Symbol 7 6 5 4 3 2 1
<0>
PR1H 1 1 1 1 1 1 1
IICPR0
XXPRX
Priority
level
selection
0
High priority level
1
Low priority level
Caution Be sure to set bits 3 and 4 of PR0L, bits 2, 4, and 5 of PR1L, and bits 1 to 7 of PR1H to 1.