h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 168

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

Section 5 Interrupt Controller
Figure 5.4 shows the timing of IRQnF setting.
The vector numbers for IRQ7 to IRQ0 interrupt exception handling are 23 to 16.
Detection of IRQ7 to IRQ0 interrupts does not depend on whether the relevant pin has been set for
input or output. Therefore, when a pin is used as an external interrupt input pin, do not clear the
corresponding DDR bit to 0 and use the pin as an I/O pin for another function. When the IRQ6 pin
is assigned as the IRQ6 interrupt input pin, then set the KMIMR6 bit to 0.
As interrupt request flags IRQ7F to IRQ0F are set when the setting condition is met, regardless of
the IER setting, only the necessary flags should be referenced.
Rev. 4.00 Jun 06, 2006 page 114 of 1004
REJ09B0301-0400
IRQn
input pin
IRQnF
IRQn input
Note: n: 7 to 0
Figure 5.3 Block Diagram of Interrupts IRQ7 to IRQ0
IRQnSCA, IRQnSCB
detection circuit
Edge/level
Figure 5.4 Timing of IRQnF Setting
Clear signal
S
R
IRQnF
Q
IRQnE
IRQn interrupt
request