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CHAPTER 17 INTERRUPT FUNCTIONS
Preliminary User’s Manual U13420EJ2V0UM00
(3) Priority specify flag registers (PR0L, PR0H, PR1L)
The priority specify flag registers are used to set the corresponding maskable interrupt priority orders.
PR0L, PR0H, and PR1L are set by a 1-bit or 8-bit memory manipulation instruction. If PR0L and PR0H are
combined to form 16-bit register PR0, they are set with a 16-bit memory manipulation instruction.
RESET input sets these registers to FFH.
Figure 17-4. Format of Priority Specify Flag Registers (PR0L, PR0H, PR1L)
Address: FFE8H After reset: FFH R/W
Symbol
7
6
5
4
3
2
1
0
PR0L
STPR0
SRPR0
SERPR0
PPR3
PPR2
PPR1
PPR0
WDTPR
Address: FFE9H After reset: FFH R/W
Symbol
7
6
5
4
3
2
1
0
PR0H
WTIPR
TMPR51
TMPR50
TMPR01
TMPR00
CSIPR1
CSIPR31
CSIPR30
Address: FFEAH After reset: FFH R/W
Symbol
7
6
5
4
3
2
1
0
PR1L
1
1
1
1
1
1
ADPR0
WTPR0
XXPRX
Priority level selection
0
High priority level
1
Low priority level
Cautions 1. When the watchdog timer is used in the watchdog timer 1 mode, set 1 in the WDTPR flag.
2. Always set PR1L bits 2 through 7 to 1.
Содержание mPD780065 Series
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