Pin Configuration - Renesas H8S Series Hardware Manual

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
0
1
Pin Name
DMA request 0
DMA transfer acknowledge 0
DMA transfer end 0
DMA request 1
DMA transfer acknowledge 1
DMA transfer end 1
Symbol I/O Function
DREQ0
Input DMAC channel 0 external
request
DACK0
Output DMAC channel 0 single address
transfer acknowledge
TEND0
Output DMAC channel 0 transfer end
DREQ1
Input DMAC channel 1 external
request
DACK1
Output DMAC channel 1 single address
transfer acknowledge
TEND1
Output DMAC channel 1 transfer end
Rev.6.00 Oct.28.2004 page 169 of 1016
REJ09B0138-0600H