HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 180

• 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)
9.3.6
Dual address mode is used for access of both the transfer source and destination by address.
Transfer source and destination can be accessed either internally or externally. Dual address mode
is subdivided into two other modes: direct address transfer mode and indirect address transfer
mode.
Rev. 5.00 Jan 06, 2006 page 160 of 818
REJ09B0273-0500
D15–D0
D15–D0
A21–A0
A21–A0
DACK
DACK
WRH
WRL
CSn
CSn
RD
CK
CK
Figure 9.6 Example of DMA Transfer Timing in the Single Address Mode
Dual Address Mode
b. External memory space to external device with DACK
a. External device with DACK to external memory space
Address output to external memory space
Data that is output from external memory space
RD signal to external memory space
DACK signal to external device with DACK
(active low)
Address output to external memory space
Data that is output from the external
device with DACK
DACK signal to external devices with
DACK (active low)
WR signal to external memory space