S29CD032J datasheet(29/76 Pages) SPANSION

29 / 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 )

margin. Section 20.1, Command Definitions on page 69 shows the address and data requirements for the

program command sequence.

Note the following:

When the Embedded Program algorithm is complete, the device returns to the read mode and address are

no longer latched. An address change is required to begin reading valid array data.

The system can determine the status of the program operation by using DQ7, DQ6 or RY/BY#. Refer to

Section 8.8, Write Operation Status on page 31 for information on these status bits.

A “0” cannot be programmed back to a “1.” Attempting to do so may halt the operation and set DQ5 to 1, or

cause the Data# Polling algorithm to indicate the operation was successful. . A succeeding read shows that

the data is still “0.” Only erase operations can convert a “0” to a “1.”

Any commands written to the device during the Embedded Program Algorithm are ignored except the

Program Suspend command.

A hardware reset immediately terminates the program operation; the program command sequence should

be re-initiated once the device has returned to the read mode, to ensure data integrity.

Figure 8.5 Program Operation

Note

See Table 19.1 and Table 20.2 for program command sequence.

8.7.2

Sector Erase

The sector erase function erases one or more sectors in the memory array. (See Table 20.1, Memory Array

Command Definitions (x32 Mode), on page 69 and Figure 8.6, Erase Operation, on page 29.) The device

does not require the system to preprogram prior to erase. The Embedded Erase algorithm automatically

programs and verifies the entire memory for an all-zero data pattern prior to electrical erase. After a

START

Write Program

Command Sequence

Data Poll

from System

Verify Data?

Yes

Last Address?

Yes

Programming

Completed

Increment Address

Embedded

Program

algorithm

in progress

S29CD032J Datasheet(PDF) 29 Page - SPANSION

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