Renesas R5S72621 User Manual
Section 25 NAND Flash Memory Controller
Page 1324 of 2108
R01UH0134EJ0400 Rev. 4.00
Sep
24,
2014
SH7262 Group, SH7264 Group
25.4.4
Command Access Mode
Command access mode accesses flash memory by specifying a command to be issued to flash
memory, address, data, read/write direction, and number of times to the registers. In this mode, I/O
data can be transferred by the DMA via FLDTFIFO.
memory, address, data, read/write direction, and number of times to the registers. In this mode, I/O
data can be transferred by the DMA via FLDTFIFO.
(1) NAND-Type Flash Memory Access
Figure 25.4 shows an example of read operation for NAND-type flash memory. In this example,
the first command is specified as H'00, address data length is specified as 3 bytes, and the number
of read bytes is specified as 8 bytes in the data counter.
the first command is specified as H'00, address data length is specified as 3 bytes, and the number
of read bytes is specified as 8 bytes in the data counter.
CLE
ALE
WE
RE
I/O7 to I/O0
R/B
H'00
A2
A1
A3
1
2
3
4
5
8
Figure 25.4 Read Operation Timing for NAND-Type Flash Memory