Renesas SH7781 User Manual

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27. NAND Flash Memory Controller (FLCTL)

Rev.1.00 Jan. 10, 2008 Page 1372 of 1658
REJ09B0261-0100

(2)

Status Read of NAND-Type Flash Memory (2048

+ 64 Bytes)

The status read of NAND-type flash memory can be performed by inputting the command H'70 to
NAND-type flash memory. When the DOSR bit in FLCMDCR is set to 1 and writing is performed
in command access mode or sector access mode, the FLCTL automatically inputs H'70 to NAND-
type flash memory and status read is performed. During the status read of NAND-type flash
memory, the I/O7 to I/O0 pins indicate the following information as shown in table 27.5.

Table 27.5 Status Read of NAND-Type Flash Memory (2048

+ 64 Bytes)

I/O Status

(Definition)

Description

I/O7

Write protection

0: Cannot be written

1: Can be written

I/O6

Ready/busy

0: Busy state

1: Ready state

I/O5

Ready/busy

0: Busy state

1: Ready state

I/O4 to I/O1

Reserved

I/O0 Write/erase 0:

Pass

1: Fail