HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 324

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

9.4.6
Channel 2 includes a reload function, in which the value returns to the value set in the SAR_2 for
each four transfers by setting the RO bit in CHCR_2 to 1. 16-byte transfer cannot be used. Figure
9.24 shows this operation. Figure 9.25 shows the timing chart of the source address reload
function, which is under the following conditions: burst mode, auto request, 16-bit transfer data
size, SAR_2 count-up, DAR_2 fixed, reload function on, and usage of only channel 2.
Rev. 4.00, 03/04, page 278 of 660
(High active)
Bus cycle
DRAK
DACK
CKIO
Transfer
request
1st sampling
Source Address Reload Function
CPU
Figure 9.24 Source Address Reload Function Diagram
DMAC
DMAC(Read)
Figure 9.23 Burst Mode, Edge Input
Reload control
DMAC control
4 time
count
DMAC(Write)
Reload signal
Count signal
RO bit = 1
DMAC(Read)
Reload
signal
(initial value)
DMATCR_2
CHCR_2
SAR_2
SAR_2
DMAC(Write)
DMAC(Read)