Renesas SH7781 - Manual (Page 1400)

27. NAND Flash Memory Controller (FLCTL)
Rev.1.00 Jan. 10, 2008 Page 1370 of 1658
REJ09B0261-0100
(2) Continuous Sector Access
Continuous physical sectors can be read from or written to by specifying the start physical sector
address of NAND-type flash memory and the number of sectors to be transferred. Figure 27.10
shows an example of physical sector specification register and transfer count specification register
settings when transferring logical sectors 0 to 40, which are not contiguous because of an unusable
sector in NAND-type flash memory.
00 12
0 0
11 11
*** 12
13
13
40 40
300 12
300 1
13 28
(FLADR, ADR17 to ADR0) (FLCMDCR, SCTCNT)
Physical
sector
Values specified in registers by CPU
Physical sector
specification
Physical sector
transfer count
Sectors 0 to 11 are transferred
Sector 12 is transferred
Sectors 13 to 40 are transferred
Logical
sector
Transfer start
Transfer start
Transfer start
Figure 27.10 Sector Access when Unusable Sector Is in Continuous Sectors