r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 140

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 5 Interrupt Controller
5.3.2
IPR are eleven 16-bit readable/writable registers that set priorities (levels 7 to 0) for interrupts
other than NMI.
The correspondence between interrupt sources and IPR settings is shown in table 5.2 (Interrupt
Sources, Vector Addresses, and Interrupt Priorities). Setting a value in the range from H'0 to H'7
in the 3-bit groups of bits 14 to 12, 10 to 8, 6 to 4, and 2 to 0 sets the priority of the corresponding
interrupt. IPR should be read in word size.
Rev. 1.00 Sep. 19, 2008 Page 110 of 1342
REJ09B0467-0100
Bit
15
14
13
12
11
10
9
8
Bit Name
IPR14
IPR13
IPR12
IPR10
IPR9
IPR8
—
—
Interrupt Priority Registers A to N (IPRA to IPRN)
Initial Value
0
1
1
1
0
1
1
1
R/W
—
R/W
R/W
R/W
—
R/W
R/W
R/W
Description
Reserved
This bit is always read as 0 and the initial value
should not be changed.
Sets the priority of the corresponding interrupt
source.
000: Priority level 0 (Lowest)
001: Priority level 1
010: Priority level 2
011: Priority level 3
100: Priority level 4
101: Priority level 5
110: Priority level 6
111: Priority level 7 (Highest)
Reserved
This bit is always read as 0 and the initial value
should not be changed.
Sets the priority of the corresponding interrupt
source.
000: Priority level 0 (Lowest)
001: Priority level 1
010: Priority level 2
011: Priority level 3
100: Priority level 4
101: Priority level 5
110: Priority level 6
111: Priority level 7 (Highest)