S29PL-J55BAI011 datasheet(60/96 Pages) SPANSION

60 / 96 page

S29PL-J

S29PL-J_00_A9 September 22, 2006

Data

Sheet

(Adv an ce

Inf o r m a t io n)

Figure 15.1 Program Operation

Note

See Table 15.1 on page 62 for program command sequence.

15.6

Chip Erase Command Sequence

Chip erase is a six bus cycle operation. The chip erase command sequence is initiated by writing two unlock

cycles, followed by a set-up command. Two additional unlock write cycles are then followed by the chip erase

command, which in turn invokes the Embedded Erase algorithm. The device does not require the system to

preprogram prior to erase. The Embedded Erase algorithm automatically preprograms and verifies the entire

memory for an all zero data pattern prior to electrical erase. The system is not required to provide any

controls or timings during these operations. Table 15.1 on page 62 shows the address and data requirements

for the chip erase command sequence.

When the Embedded Erase algorithm is complete, that bank returns to the read mode and addresses are no

longer latched. The system can determine the status of the erase operation by using DQ7, DQ6, DQ2, or RY/

BY#. Refer to Write Operation Status on page 64 for information on these status bits.

Any commands written during the chip erase operation are ignored. Note that Secured Silicon Sector,

autoselect, and CFI functions are unavailable when a [program/erase] operation is in progress. However,

note that a hardware reset immediately terminates the erase operation. If that occurs, the chip erase

command sequence should be reinitiated once that bank has returned to reading array data, to ensure data

integrity.

Figure 15.2 on page 59 illustrates the algorithm for the erase operation. Refer to the tables in Erase/Program

Operations on page 76 for parameters, and Figure 20.8 on page 78 for timing diagrams.

START

Write Program

Command Sequence

Data Poll

from System

Verify Data?

Yes

Last Address?

Yes

Programming

Completed

Increment Address

Embedded

Program

algorithm

in progress

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