NEC mPD78F0730 Preliminary User's Manual page 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.
Address: FFE8H
Symbol
PR0L
Address: FFE9H
Symbol
PR0H
Address: FFEAH
Symbol
PR1L
Address: FFEBH
Symbol
PR1H
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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CHAPTER 13 INTERRUPT FUNCTIONS
Figure 13-4. Format of Priority Specification Flag Registers (PR0L, PR0H, PR1L, PR1H)
After reset: FFH R/W
<7> <6>
SREPR6 USBPR1
After reset: FFH R/W
<7> <6>
TMPR010 TMPR000
After reset: FFH R/W
7 6
1 1
After reset: FFH R/W
7 6
1 1
XXPRX
0 High priority level
1 Low priority level
Preliminary User's Manual U19014EJ1V0UD
<5> <4> <3>
USBPR0 PPR3 PPR2
<5> <4> <3>
TMPR50 USBPR2 TMPRH1
5 4 <3>
1 1 TMPR51
5 4 3
1 1 1
Priority level selection
<2> <1> <0>
PPR1 PPR0 LVIPR
<2> <1> <0>
CSIPR10 STPR6 SRPR6
2 1 <0>
1 1 RSUMPR
2 1 0
1 1 1
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