NEC mPD178054 Series User Manual page 163

(3) Priority specification flag registers (PR0L, PR0H)
The priority specification flags are used to set the corresponding maskable interrupt priority orders.
PR0L and PR0H 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.
Figure 12-4. Format of Priority Specification Flag Registers (PR0L, PR0H)
Symbol
<7> <6>
PR0L CSIPR31 KYPR
<7> <6>
PR0H TMPR53 TMPR52
××PR×
0 High priority level
1 Low priority level
Caution When the watchdog timer is used in watchdog timer mode 1, set the WDTPR flag to 1.
CHAPTER 12 INTERRUPT FUNCTIONS
<5> <4> <3> <2>
PPR4 PPR3 PPR2 PPR1
<5> <4> <3> <2>
TMPR51 TMPR50 CSIPR30 CSIPR32
Priority level selection
User's Manual U15104EJ2V0UD
Address
<1> <0>
PPR0 WDTPR FFE8H
<1> <0>
ADPR BTMPR0 FFE9H
After reset R/W
FFH R/W
FFH R/W
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