HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 185

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

External memory space
(External memory space has 16-bit width)
data bus
D15–D0
Internal
A21–A0
address
address
Internal
Figure 9.10 Dual Address Mode and Indirect Address Transfer Timing Example 1
indirect
DMAC
DMAC
Notes: 1.
WRH,
buffer
buffer
WRL
CSn
data
bus
RD
CK
2.
The internal address bus is controlled by the port and does not change.
DMAC does not fetch value until 32-bit data is read from the internal data
bus.
address (H)
Transfer source
address (H)
(1st)
Address read cycle
Indirect
Transfer
address
source
Transfer source address
External memory space
1
address (L)
address (L)
Transfer
(2nd)
source
Indirect
NOP
Section 9 Direct Memory Access Controller (DMAC)
2
cycle
NOP
NOP
Rev. 5.00 Jan 06, 2006 page 165 of 818
Indirect
address
read cycle
Indirect
address
address
Data
Indirect
(3rd)
Transfer
data
Transfer
data
Transfer
write cycle
destination
data
Transfer
address
Data
(4th)
Transfer
REJ09B0273-0500
Transfer
data
data