UPD78F0138 NEC, UPD78F0138 Datasheet - Page 368

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

(3) Priority specification flag registers (PR0L, PR0H, PR1L, PR1H)
368
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 with a 16-bit memory
manipulation instruction.
RESET input sets these registers to FFH.
Notes 1.
Address: FFE8H
Symbol
PR0L
Address: FFE9H
Symbol
PR0H
Address: FFEAH
Symbol
PR1L
Address: FFEBH
Symbol
PR1H
2.
Figure 17-4. Format of Priority Specification Flag Registers (PR0L, PR0H, PR1L, PR1H)
Be sure to set bits 4 to 7 of PR1H to 1.
µ
and 780132 to 1.
PD780133, 780134, 78F0134, 780136, 780138, and 78F0138 only. Be sure to set the
TMPR010
SREPR6
XXPRX
PPR7
1
<7>
<7>
<7>
Note 1
7
0
1
After reset: FFH
After reset: FFH
After reset: FFH
After reset: FFH
High priority level
Low priority level
TMPR000
PPR5
PPR6
1
<6>
<6>
<6>
Note 1
6
CHAPTER 17 INTERRUPT FUNCTIONS
R/W
R/W
R/W
R/W
TMPR50
WTPR
PPR4
1
<5>
<5>
<5>
Note 1
User’s Manual U16228EJ2V0UD
5
TMPRH0
KRPR
PPR3
1
<4>
<4>
<4>
Note 1
4
Priority level selection
TMPR011
TMPRH1
TMPR51
PPR2
<3>
<3>
<3>
<3>
Note 2
TMPR001
DUALPRO
WTIPR
PPR1
<2>
<2>
<2>
<2>
Note 2
CSIPR11
SRPR0
STPR6
PPR0
<1>
<1>
<1>
<1>
Note 2
DMUPR
SRPR6
LVIPR
ADPR
<0>
<0>
<0>
<0>
µ
PD780131