HD6432646 Hitachi, HD6432646 Datasheet - Page 139

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

5.2.2
The IPR registers are eleven 8-bit readable/writable registers that set priorities (levels 7 to 0) for
interrupts other than NMI.
The correspondence between IPR settings and interrupt sources is shown in table 5-3.
The IPR registers set a priority (level 7 to 0) for each interrupt source other than NMI.
The IPR registers are initialized to H'77 by a reset and in hardware standby mode.
Bits 7 and 3—Reserved: These bits are always read as 0 and cannot be modified.
Table 5-3
Register
IPRA
IPRB
IPRC
IPRD
IPRE
IPRF
IPRG
IPRH
IPRJ
IPRK
IPRM
Notes: *1 Reserved. These bits are always read as 1 and cannot be modified.
Bit
Initial value
R/W
*2 In the H8S/2646, H8S/2646R, and H8S/2645 these are reserved bits that are always
Interrupt Priority Registers A to H, J, K, M (IPRA to IPRH, IPRJ, IPRK, IPRM)
read as 1 and should only be written with H'7. In the H8S/2648, H8S/2648R, and
H8S/2647 these are the IPR bits for SCI channel 2.
Correspondence between Interrupt Sources and IPR Settings
:
:
:
—
—
7
0
IPR6
R/W
6 to 4
IRQ0
IRQ2
IRQ3
—
Watchdog timer 0
PC break
TPU channel 0
TPU channel 2
TPU channel 4
—
SCI channel 1
PWM channel 1, 2
6
1
* 1
* 1
IPR5
R/W
5
1
IPR4
R/W
4
1
—
—
3
0
Bits
2 to 0
IRQ1
IRQ4
IRQ5
DTC
—
A/D converter, Watchdog timer 1
TPU channel 1
TPU channel 3
TPU channel 5
SCI channel 0
SCI channel 2 (H8S/2648R)
HCAN
*1
IPR2
R/W
2
1
IPR1
R/W
1
1
IPR0
R/W
0
1
*2
105