Renesas SH7781 - Manual (Page 1398)

27. NAND Flash Memory Controller (FLCTL)
Rev.1.00 Jan. 10, 2008 Page 1368 of 1658
REJ09B0261-0100
27.4.3 Sector Access Mode
In sector access mode, flash memory can be read from or written to in sector units by specifying
the number of physical sectors to be accessed.
Since 512-byte data is stored in FLDTFIFO and 16-byte control code is stored in FLECFIFO,
DMA transfer can be performed by setting the DREQ1EN and DREQ0EN bits in FLINTDMACR.
Figure 27.8 shows the relationship of DMA transfer between sectors in flash memory (data and
control code) and memory in the address space.
FLCTL
FLDTFIFO
FLECFIFO
Flash memory
Data (512 bytes)
Control
code
(16 bytes)
DMA (channel 0)
transfer
DMA (channel 1)
transfer
Address space (external memory area)
Data area
Control code area
Figure 27.8 Diagram of DMA Transfer between Sector (Data and Control Code) in Flash
Memory and Memory in Address Space