hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 652

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Appendix B Internal I/O Registers
IRR1—Interrupt Request Register 1
Note: * Bits 7 and 4 to 0 can only be written with 0, for flag clearing.
Rev. 7.00 Mar 10, 2005 page 610 of 652
REJ09B0042-0700
Bit
Initial value
Read/Write
IRRTA
R/(W) *
Timer A Interrupt Request Flag
7
0
0 Clearing condition:
1 Setting condition:
When the timer A counter value overflows (from H'FF to H'00)
When IRRTA = 1, it is cleared by writing 0


W
IRQ4 and IRQ3 Interrupt Request Flags
6
0 Clearing condition:
1 Setting condition:
When IRRIm = 1, it is cleared by writting 0
When pin IRQm is designated for interrupt
input and the designated signal edge is input


IRQAEC Interrupt Request Flag
5
1
0 Clearing condition:
1 Setting condition:
When pin IRQAEC is designated for interrupt
input and the designated signal edge is input
When IRREC2 = 1, it is cleared by writing 0
R/(W) *
IRRI4
IRQ1 and IRQ0 Interrupt Request Flags
0 Clearing condition:
1 Setting condition:
4
0
When IRRIn = 1, it is cleared by writing 0
When pin IRQn is designated for interrupt
input and the designated signal edge is input
R/(W) *
IRRI3
3
0
H'F6
IRREC2
R/(W) *
(m = 4 or 3)
2
0
R/(W) *
IRRI1
1
0
System Control
R/(W) *
IRRI0
(n = 1 or 0)
0
0