Renesas RL78/G1P Hardware User Manual page 600

16-bit single-chip microcontroller

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15.3.3 Priority specification flag registers (PR00L, PR00H, PR01L, PR10L, PR10H, PR11L)

The priority specification flag registers are used to set the corresponding maskable interrupt priority level.

A priority level is set by using the PR0xy and PR1xy registers in combination (xy = 0L, 0H, 1L, 1H, 2L, or 2H).

The PR00L, PR00H, PR01L, PR10L, PR10H, and PR11L registers can be set by a 1-bit or 8-bit memory manipulation

instruction. If the PR00L and PR00H registers, and the PR10L and PR10H registers are combined to form 16-bit registers

PR00 and PR10, they can be set by a 16-bit memory manipulation instruction.

Reset signal generation sets these registers to FFH.

Remark If an instruction that writes data to this register is executed, the number of instruction execution clocks

increases by 2 clocks.

Figure 15-4. Format of Priority Specification Flag Registers (PR00L, PR00H, PR01L, PR10L, PR10H, PR11L)

Address: FFFE8H

Address: FFFECH

Address: FFFE9H

Address: FFFEDH

Address: FFFEAH

Address: FFFEEH

Caution Be sure to set bits that are not available to the initial value.

R01UH0895EJ0100 Rev.1.00

Nov 29, 2019

After reset: FFH

After reset: FFH

After reset: FFH

After reset: FFH

After reset: FFH

After reset: FFH

Specify level 0 (high priority level)

Specify level 1

Specify level 2

Specify level 3 (low priority level)

CHAPTER 15 INTERRUPT FUNCTIONS

Priority level selection