r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 156

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

Section 5 Interrupt Controller
5.4.2
The sources for internal interrupts from on-chip peripheral modules have the following features:
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Rev. 1.00 Sep. 19, 2008 Page 126 of 1342
REJ09B0467-0100
IRQn
input
Note: n = 0 to 15 for H8S/2456 Group and H8S/2456R Group, n = 0 to 7 for H8S/2454 Group
and enable bits that select enabling or disabling of these interrupts. They can be controlled
independently. When the enable bit is set to 1, an interrupt request is issued to the interrupt
controller.
interrupt control mode or CPU interrupt mask bit.
For each on-chip peripheral module there are flags that indicate the interrupt request status,
The interrupt priority level can be set by means of IPR.
The DMAC and DTC can be activated by a TPU, SCI, or other interrupt request.
When the DMAC or DTC is activated by an interrupt request, it is not affected by the
Internal Interrupts
IRQnSCA, IRQnSCB
level detection
Figure 5.2 Block Diagram of IRQ Interrupts
Edge/
circuit
Clear signal
R
S
IRQnF
Q
IRQnE
IRQn interrupt
request