NEC mPD780852 Series Preliminary User's Manual page 248

(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 with 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 19-4. Priority Specify Flag Register (PR0L, PR0H, PR1L) Format
Address: FFE8H After Reset: FFH R/W
Symbol 7
PR0L PPR1
Address: FFE9H After Reset: FFH R/W
Symbol 7
PR0H TMPR3
Address: FFEAH After Reset: FFH R/W
Symbol 7
PR1L 1
XXPRX
0
1
Cautions 1. When the watchdog timer is used in the watchdog timer mode 1, set 1 in the WDTPR flag.
2. Bits 3 to 7 of PR1L must be set to 1.
248
CHAPTER 19 INTERRUPT FUNCTIONS
6 5
PPR0 TMPR02 TMPR01
6 5
TMPR2 TMPR1 STPR
6 5
1 1
High priority level
Low priority level
Preliminary User's Manual U14581EJ3V0UM00
4 3 2
TMPR00 OVFPR
4 3 2
SRPR SERPR
4 3 2
1 1 WTPR
Priority Level Selection
1 0
ADPR WDTPR
1 0
CSIPR3 PPR2
1 0
WTIPR CSIPR2