HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 251

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

10.5.2
Below is an transfer example in which the transfer source is an external memory and the transfer
destination is an external device with DACK, using channel 1 of the DMAC which requires an
external request in single address mode.
Table 10.7 indicates the transfer conditions and the setting values of each of the registers.
Table 10.7 Transfer Conditions and Register Set Values for Transfer between External
Transfer Conditions
Transfer source: external RAM
Transfer destination: external device with DACK
Transfer count: 32 times
Transfer source address: decremented
Transfer destination address: (setting ineffective)
Transfer request source: external pin (DREQ1) edge
detection
Bus mode: burst
Transfer unit: word
No interrupt request generation at end of transfer
Channel priority ranking: 2 > 0 > 1 > 3
Example of DMA Transfer between External RAM and External Device with
DACK
RAM and External Device with DACK
10. Direct Memory Access Controller (DMAC)
Register
SAR_1
DAR_1
DMATCR_1
CHCR_1
DMAOR
Rev.4.00 Mar. 27, 2008 Page 207 of 882
Value
H'00400000
H'00000020
H'00002269
H'0201
(access by DACK)
REJ09B0108-0400