NEC - page 485

485
CHAPTER 21 INTERRUPT AND TEST FUNCTIONS
7
PPR6
Symbol
PR0L
6
PPR5
5
PPR4
4
PPR3
3
PPR2
2
PPR1
1
PPR0
0
TMPR4
Address
FFE8H FFH
After
Reset R/W
R/W
0
1
Priority Level Selection
High priority level
Low priority level
7
TMPR01 PR0H
6
TMPR00
5
TMPR3
4
STPR
3
SRPR
2
SERPR
1
CSIPR1
0
CSIPR0
7
1PR1L
6
1
5
1
4
1
3
1
2
ADPR
1
TMPR2
0
TMPR1
FFE9H FFH R/W
FFEAH FFH R/W
× ×
PR ×
Cautions 1. If a watchdog timer is used in watchdog timer mode 1, set TMPR4 flag to 1.
2. Set always 1 in PR1L bits 3 to 7.
(3) Priority specify flag registers (PR0L, PR0H, and PR1L)
The priority specify flag is used to set the corresponding maskable interrupt priority orders.
PR0L, PR0H, and PR1L 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 21-4. Priority Specify Flag Register Format