SH7211 Group
Data Transfer between On-chip RAM Areas with DMAC (Cycle-Stealing Mode)
REJ06B0732-0100/Rev.1.00
March 2008
Page 6 of 13
2.2
Operational Description of Sample Program
The settings of the DMAC for the sample program are listed in table 4. Also, the operation of the sample program is
illustrated in figure 4.
Table 4 Settings of DMAC
DMA transfer condition
Auto request mode
Channel CH0
Length of transfer data
4 bytes
Maximum transfer count
128 transfers (128
×
data length of 4 bytes = 512-byte data)
Address mode
Dual address mode
Bus mode
Cycle-stealing mode
Priority level
Channel priority level fixed mode
Interrupt request
Disable an interrupt request to the CPU at the end of a transfer
DMAC
H'0xFFF81000
H'0xFFF82000
DAR
SAR
Transfer source
address
On-chip RAM
DMA transfer
512-byte data
512-byte data
Transfer
destination
address
[Legend]
SAR:Source address register
DAR:Destination address register
Figure 4 Operation of Sample Program
