UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 733

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(3) Priority specification flag registers (PR0L, PR0H, PR1L, PR1H)
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 signal generation sets these registers to FFH.
Address: FFE8H
Symbol
PR0L
Address: FFE9H
Symbol
PR0H
Address: FFEAH
Symbol
PR1L
Address: FFEBH
Symbol
PR1H
Caution Be sure to set bit 5 to 7 of PR1H to 1.
Figure 19-4. Format of Priority Specification Flag Registers (PR0L, PR0H, PR1L, PR1H)
TP1CC1PR TP1CC0PR TP0CC1PR TP0CC0PR
DUALPR5
XXPRX
PPR61
WTIPR
WTPR
<7>
<7>
<7>
7
1
0
1
After reset: FFH
After reset: FFH
After reset: FFH
After reset: FFH
High priority level
Low priority level
DUALPR3
CSIPR10
ADPR
PPR2
<6>
<6>
<6>
6
1
CHAPTER 19 INTERRUPT FUNCTIONS
R/W
R/W
R/W
R/W
Preliminary User’s Manual U19748EJ1V0UD
TP2CC1PR TP2CC0PR
STPR60
<5>
<5>
<5>
5
1
TP4CC1PR TP4CC0PR TP3CC1PR TP3CC0PR
SRPR60
<4>
<4>
<4>
<4>
Priority level selection
DUALPR1
DUALPR4
TP2OVPR
TMPR50
PPR60
PPR3
PPR4
<3>
<3>
<3>
<3>
DUALPR0
C0TRXPR
CSIPR11
IICPR0
PPR1
<2>
<2>
<2>
<2>
C0RECPR
STPR61
PPR0
<1>
<1>
<1>
<1>
C0WUPPR
DUALPR6
TP3OVPR
C0ERRPR
DUALPR2
SRPR61
TMPR51
LVIPR
<0>
<0>
<0>
<0>
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