HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 487

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 10.2 shows a flowchart of this procedure.
Notes: 1. In auto-request mode, transfer begins when the NMIF, AE, and TE bits are all 0 and the DE and
(SAR, DAR, DMATCR, CHCR, DMAOR, DMARS)
DMATCR – 1 → DMATCR, SAR and DAR
2. DREQ = level detection in burst mode (external request) or cycle-steal mode.
3. DREQ = edge detection in burst mode (external request), or auto-request mode in burst mode.
DEI interrupt request (when IE = 1)
DME bits are set to 1.
or AE = 1 or DE = 0
NMIF, AE, TE = 0?
Transfer (1 transfer unit);
DE, DME = 1 and
Transfer request
DMATCR = 0?
or DME = 0?
Yes
Transfer end
Initial settings
Yes
Yes
occurs?*
Yes
NMIF = 1
TE = 1
Start
updated
Figure 10.2
1
No
No
No
No
DMA Transfer Flowchart
or AE = 1 or DE = 0
Section 10
Transfer aborted
or DME = 0?
Normal end
Yes
NMIF = 1
*
3
Rev. 3.00 Jan. 18, 2008 Page 425 of 1458
DREQ detection selection
Direct Memory Access Controller (DMAC)
transfer request mode,
Bus mode,
system
No
*
2
REJ09B0033-0300