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Renesas SH7641 User Manual

Page 464

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Section 13 Direct Memory Access Controller (DMAC)

Rev. 4.00 Sep. 14, 2005 Page 414 of 982

REJ09B0023-0400

Bit Bit

Name

Initial
Value R/W Descriptions

2 IE

0 R/W

Interrupt

Enable

This bit specifies whether or not an interrupt request is
generated to the CPU at the end of the DMA transfer.
Setting this bit to 1 generates an interrupt request
(DEI) to the CPU when TE bit is set to 1.

0: Interrupt request is not generated

1: Interrupt request is generated

1 TE

0 R/W* Transfer End Flag

This bit shows that DMA transfer ends. TE is set to 1
when data transfer ends when DMATCR becomes
to 0.

The TE bit is not set to 1 in the following cases.

• DMA transfer ends due to a NMI interrupt or DMA

address error before DMATCR becomes to 0.

• DMA transfer is ended by clearing the DE bit and

DME bit in DMA operation register (DMAOR).

Even if the DE bit is set to 1 while this bit is set to 1,
transfer is not enabled.

0: During the DMA transfer or DMA transfer has been

interrupted

1: Data transfer ends by the specified count (DMACTR

= 0)

[Clearing condition]

Writing 0 after TE = 1 read

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