HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 206

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 Direct Memory Access Controller (DMAC)
9.3.11
Channel 2 has a source address reload function. This returns to the first value set in the source
address register (SAR2) every four transfers by setting the RO bit of CHCR2 to 1. Figure 9.25
illustrates this operation. Figure 9.26 is a timing chart for reload ON mode, with burst mode,
autorequest, 16-bit transfer data size, SAR2 increment, and DAR2 fixed mode.
Rev. 5.00 Jan 06, 2006 page 186 of 818
REJ09B0273-0500
Transfer
request
Source Address Reload Function
DMAC
DMAC control block
Figure 9.25 Source Address Reload Function
Reload control
4th count
Reload signal
Count signal
RO bit = 1
Reload
signal
(initial value)
DMATCR2
CHCR2
SAR2
SAR2