r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 152

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 5 Interrupt Controller
A block diagram of IRQn interrupts is shown in figure 5.2.
5.4.2
The sources for internal interrupts from on-chip peripheral modules have the following features:
• 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 interrupt
Rev. 1.00 Sep. 19, 2008 Page 124 of 1270
REJ09B0466-0100
IRQn
input
Note: n = 0 to 15 for H8S/2426 Group and H8S/2426R Group, n = 0 to 7 for H8S/2424 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.
control mode or CPU interrupt mask bit.
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