D12320VF25IV Datasheet, PDF (253/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 7 DMA Controller (Not Supported in the H8S/2321)
7.1.4 Pin Configuration
Table 7.2 summarizes the DMAC pins.
In short address mode, external request transfer, single address transfer, and transfer end output
are not performed for channel A.
The DMA transfer acknowledge function is used in channel B single address mode in short
address mode.
When the DREQ pin is used, do not designate the corresponding port for output.
With regard to the DACK pins, setting single address transfer automatically sets the corresponding
port to output, functioning as a DACK pin.
With regard to the TEND pins, whether or not the corresponding port is used as a TEND pin can
be specified by means of a register setting.
Table 7.2 DMAC Pins
Channel Pin Name
0
DMA request 0
Symbol
DREQ0
DMA transfer acknowledge 0 DACK0
DMA transfer end 0
1
DMA request 1
TEND0
DREQ1
DMA transfer acknowledge 1 DACK1
DMA transfer end 1
TEND1
I/O
Input
Output
Output
Input
Output
Output
Function
DMAC channel 0 external
request
DMAC channel 0 single address
transfer acknowledge
DMAC channel 0 transfer end
DMAC channel 1 external
request
DMAC channel 1 single address
transfer acknowledge
DMAC channel 1 transfer end
Rev.6.00 Sep. 27, 2007 Page 221 of 1268
REJ09B0220-0600