SH7041A datasheet(155/923 Pages) RENESAS

部件名	SH7041A

功能描述	Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

PDF	923 Pages

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制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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155 / 923 page

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Interrupt source

flag clear

(by DMAC)

Interrupt source

(those not designated as DMAC activating sources)

CPU interrupt request

DTC activation

request

DTECLR

Transfer end

DTE clear

Interrupt source

flag clear (by DTC)

DTER

DMAC

Figure 6.6 Interrupt Control Block Diagram

6.6.1

Handling DTC Activating and CPU Interrupt Sources, but Not DMAC Activating

Sources

1. Either do not select the DMAC as a source, or clear the DME bit to 0.

2. For DTC, set the corresponding DTE bits and DISEL bits to 1.

3. Activating sources are applied to the DTC when interrupts occur.

4. When the DTC performs a data transfer, it clears the DTE bit to 0 and sends an interrupt

request to the CPU. The activating source does not clear.

5. The CPU clears interrupt sources with its interrupt processing routine. It then confirms the

transfer counter value. When the transfer counter value

≠ 0, it sets the DTE bit to 1 and allows

the next data transfer. If the transfer counter value = 0, it performs the necessary end

processing in the interrupt processing routine.

SH7041A 数据表(PDF) 155 Page - Renesas Technology Corp