r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1394
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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27. NAND Flash Memory Controller (FLCTL)
27.4
27.4.1
Two operating modes are supported.
• Command access mode
• Sector access mode
27.4.2
Command access mode is a mode that accesses flash memory by specifying a command to be
issued to flash memory, address, data, read or write direction, and number of times for the
registers. In this mode, DMA transfer of input or output data can be performed by using
FLDTFIFO.
(1)
Figure 27.2 shows an example of reading operation for NAND-type flash memory. In this
example, the first command is set to H'00, address data length is set to 3 bytes, and the number of
read bytes is set to 6 bytes in the data counter.
Rev.1.00 Jan. 10, 2008 Page 1364 of 1658
REJ09B0261-0100
CLE
ALE
WE
RE
I/O7 to I/O0
R/B
NAND-Type Flash Memory Access (512 + 16 Bytes)
Operation
Operating Modes
Command Access Mode
Figure 27.2 Reading Operation Timing for NAND-Type Flash Memory
Command stage
H'00
Address stage
A1
A2
A3
1
2
Data stage
3
4
5
6
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