S29CD032G datasheet(52/93 Pages) SPANSION

52 / 93 page

S29CD032G

30606B0 March 22, 2004

Ad va n c e

In f o rm a t i o n

dow has expired. The status of the sector erase operation is determined three

ways:

Data# polling of the DQ7 pin

Checking the status of the toggle bit DQ6

Checking the status of the RY/BY# pin

Further status of device activity during the sector erase operation is determined

using toggle bit DQ2 (refer to DQ2: Toggle Bit II).

When the Embedded Erase algorithm is complete, the device returns to reading

array data, and addresses are no longer latched. Note that an address change is

required to begin read valid array data.

Figure 5 illustrates the Embedded™ Erase Algorithm, using a typical command

sequence and bus operation. Refer to the Erase/Program Operations tables in the

AC Characteristics section for parameters, and to Figures 21 and 22 for timing

diagrams.

Sector Erase and Program Suspend Command

The Sector Erase and Program Suspend command allows the user to interrupt a

Sector Erase or Program operation and perform data read or programs in a sector

that is not being erased or to the sector where a programming operation was ini-

tiated. This command is applicable only during the Sector Erase and

Programming operation, which includes the time-out period for Sector Erase.

START

Write Erase

Command Sequence

Data Poll

from System

Data = FFh?

Yes

Erasure Completed

Embedded

Erase

algorithm

in progress

Notes:

1. See Tables 19 and 20 for erase command sequence.

2. See DQ3: Sector Erase Timer for more information.

Figure 5. Erase Operation

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