h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 952

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Appendix B Internal I/O Registers
ISR—IRQ Status Register
Rev. 4.00 Jun 06, 2006 page 898 of 1004
REJ09B0301-0400
Note: * Only 0 can be written, to clear the flag.
Bit
Initial value
Read/Write
Note: * When a product, in which a DTC is incorporated, is used in the following settings,
IRQ7 to IRQ0 flags
R/(W) *
0
1
IRQ7F
7
0
[Clearing conditions]
• Cleared by reading IRQnF when set to 1, then writing 0 in IRQnF
• When interrupt exception handling is executed when low-level detection
• When IRQn interrupt exception handling is executed when falling, rising,
[Setting conditions]
• When IRQn input goes low when low-level detection is set
• When a falling edge occurs in IRQn input when falling edge detection is
• When a rising edge occurs in IRQn input when rising edge detection is
• When a falling or rising edge occurs in IRQn input while both-edge
is set (IRQnSCB = IRQnSCA = 0) and IRQn input is high *
or both-edge detection is set (IRQnSCB = 1 or IRQnSCA = 1) *
(IRQnSCB = IRQnSCA = 0)
set (IRQnSCB = 0, IRQnSCA = 1)
set (IRQnSCB = 1, IRQnSCA = 0)
detection is set (IRQnSCB = IRQnSCA = 1)
the corresponding flag bit is not automatically cleared even when exception
handling, which is a clear condition, is executed and the bit is held at 1.
(1) When DTCEA3 is set to 1 (ADI is set to an interrupt source) IRQ4F flag is
(2) When DTCEA2 is set to 1 (ICIA is set to an interrupt source) IRQ5F flag is
(3) When DTCEA1 is set to 1 (ICIB is set to an interrupt source) IRQ6F flag is
(4) When DTCEA0 is set to 1 (OCIA is set to an interrupt source) IRQ7F flag is
R/(W) *
IRQ6F
not automatically cleared.
not automatically cleared.
not automatically cleared.
not automatically cleared.
When activation interrupt sources of DTC and IRQ interrupts are used with
the above combinations, clear the interrupt flag by software in the interrupt
handling routine of the corresponding IRQ.
6
0
R/(W) *
IRQ5F
5
0
R/(W) *
IRQ4F
4
0
H'FEEB
R/(W) *
IRQ3F
3
0
R/(W) *
IRQ2F
2
0
R/(W) *
IRQ1F
1
0
Interrupt Controller
(n = 7 to 0)
R/(W) *
IRQ0F
0
0