S29CD032J datasheet(39/76 Pages) SPANSION

39 / 76 page

September 27, 2006 S29CD-J_CL-J_00_B1

S29CD-J & S29CL-J Flash Family

Da ta

Shee t

(Prelim i nar y )

8.9

Reset Command

Writing the reset command resets the device to the read or erase-suspend-read mode. Address bits are don’t

cares for this command.

The reset command may be written between the cycles in an erase command sequence before erasing

begins. This resets the device to the read mode. However, once erasure begins, the device ignores the reset

commands until the operation is complete.

The reset command may be written between the cycles in a program command sequence before

programming begins. This resets the device to the read mode. If the program command sequence is written

while the device is in the Erase Suspend mode, writing the reset command returns the device to the erase-

suspend-read mode. However, once programming begins, the device ignores the reset commands until the

operation is complete.

The reset command may be written between the cycles in an autoselect command sequence. Once in the

autoselect mode, the reset command must be written to exit the autoselect mode and return to the read

mode.

If DQ5 goes high during a program or erase operation, writing the reset command returns the device to the

read mode or erase-suspend-read-mode if the device was in Erase Suspend. When the reset command is

written, before the embedded operation starts, the device requires tRR before it returns to the read or erase-

suspend-read mode.

Advanced Sector Protection/Unprotection

The Advanced Sector Protection/Unprotection feature disables or enables programming or erase operations

in any or all sectors and can be implemented through software and/or hardware methods, which are

independent of each other. This section describes the various methods of protecting data stored in the

memory array. An overview of these methods in shown in Figure 9.1.

Table 8.10 Reset Command Timing

Parameter

Description

Max.

Unit

tRR

Reset Command to Read Mode

or Erase-Suspend-Read Mode

250

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