CHAPTER 13 INTERRUPT FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
399
(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 13-4. Format of Priority Specification Flag Registers (PR0L, PR0H, PR1L, PR1H)
Address: FFE8H After reset: FFH R/W
Symbol <7> <6> <5> <4> <3> <2> <1> <0>
PR0L
SREPR6
USBPR1
USBPR0
PPR3 PPR2 PPR1 PPR0 LVIPR
Address: FFE9H After reset: FFH R/W
Symbol <7> <6> <5> <4> <3> <2> <1> <0>
PR0H TMPR010
TMPR000
TMPR50
USBPR2
TMPRH1
CSIPR10
STPR6
SRPR6
Address: FFEAH After reset: FFH R/W
Symbol 7 6 5 4
<3>
2 1
<0>
PR1L 1 1 1 1
TMPR51
1 1
RSUMPR
Address: FFEBH After reset: FFH R/W
Symbol 7 6 5 4 3 2 1 0
PR1H 1 1 1 1 1 1 1 1
XXPRX
Priority
level
selection
0
High priority level
1
Low priority level
Caution Be sure to set bits 1, 2, 4 to 7 of PR1L and bits 0 to 7 of PR1H to 1.
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