HD6433636SW datasheet(84/418 Pages) RENESAS

Nome de Peças	HD6433636SW

Descrição Electrónicos	8-Bit Microcomputer

PDF	418 Pages

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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3.3.4

Internal Interrupts

There are 17 internal interrupts that can be requested by the on-chip peripheral modules. When a

peripheral module requests an interrupt, the corresponding bit in IRR1 or IRR2 is set to 1.

Individual interrupt requests can be disabled by clearing the corresponding bit in IENR1 or IENR2

to 0. All interrupts can be masked by setting the I bit in CCR to 1. When an internal interrupt

request is accepted, the I bit in CCR is set to 1. Vector numbers 10 to 20 are assigned to these

interrupts. Table 3.2 shows the order of priority of interrupts from on-chip peripheral modules.

3.3.5

Interrupt Operations

Interrupts are controlled by an interrupt controller. Figure 3.2 shows a block diagram of the

interrupt controller. Figure 3.3 shows the flow up to interrupt acceptance.

Interrupt controller

Interrupt

request

CCR (CPU)

External or

internal

interrupts

External

interrupts or

internal

interrupt

enable

signals

Figure 3.2 Block Diagram of Interrupt Controller

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