HD64F3039F18 Datasheet, PDF (112/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 5 Interrupt Controller
5.2.2 Interrupt Priority Registers A and B (IPRA, IPRB)
IPRA and IPRB are 8-bit readable/writable registers that control interrupt priority.
Interrupt Priority Register A (IPRA)
IPRA is an 8-bit readable/writable register in which interrupt priority levels can be set.
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
IPRA7 IPRA6 — IPRA4 IPRA3 IPRA2 IPRA1 IPRA0
0
0
0
0
0
0
0
0
R/W
R/W R/W
R/W R/W R/W
R/W R/W
Priority
level A0
Selects the
priority level
of ITU
channel 2
interrupt
requests
Priority level A1
Selects the priority level
of ITU channel 1
interrupt requests
Priority level A2
Selects the priority level of
ITU channel 0 interrupt requests
Priority level A3
Selects the priority level of
WDT interrupt requests
Priority level A4
Selects the priority level of IRQ₄ and IRQ₅
interrupt requests
Reserved bit
Priority level A6
Selects the priority level of IRQ₁ interrupt requests
Priority level A7
Selects the priority level of IRQ ₀ interrupt requests
Rev.3.00 Mar. 26, 2007 Page 88 of 682
REJ09B0353-0300