H8SXSLASH1663M datasheet(155/1504 Pages) RENESAS

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Section 6 Exception Handling

Rev. 2.00 Sep. 24, 2008 Page 123 of 1468

REJ09B0412-0200

6.6

Interrupts

6.6.1

Interrupt Sources

Interrupt sources are NMI, IRQ0 to IRQ11, and on-chip peripheral modules, as shown in table 6.7.

Table 6.7

Interrupt Sources

Type

Source

Number of Sources

NMI

NMI pin (external input)

UBC break

interrupt

UBC break controller (UBC)

IRQ0 to IRQ11

Pins

IRQ0 to IRQ11 (external input)

Voltage-detection

circuit*

Voltage-detection circuit (LVD)

32K timer (TM32K)

DMA controller (DMAC)

EXDMA controller (EXDMAC)

Watchdog timer (WDT)

A/D converter

16-bit timer pulse unit (TPU)

8-bit timer (TMR)

Serial communications interface (SCI)

2C bus interface 2 (IIC2)

On-chip peripheral

module

USB function module (USB)

Note:

Supported only by the H8SX/1668M Group.

Different vector numbers and vector table offsets are assigned to different interrupt sources. For

vector number and vector table offset, refer to table 7.2, Interrupt Sources, Vector Address

Offsets, and Interrupt Priority in section 7, Interrupt Controller.

6.6.2

Interrupt Exception Handling

Interrupts are controlled by the interrupt controller. The interrupt controller has two interrupt

control modes and can assign interrupts other than NMI to eight priority/mask levels to enable

multiple-interrupt control. The source to start interrupt exception handling and the vector address

differ depending on the product. For details, refer to section 7, Interrupt Controller.

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