S29CD032J datasheet(42/76 Pages) SPANSION

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S29CD-J & S29CL-J Flash Family

S29CD-J_CL-J_00_B1 September 27, 2006

Data

Sheet

(Pre limin ar y)

Figure 9.2 PBB Program Operation

9.2.2

Erasing PPB

The All PPB Erase command is used to erase all the PPBs in bulk. There are no means for individually

erasing a specific PPB. The first three cycles of the PPB Erase command are standard unlock cycles. The

fourth cycle executes the erase pulse to all the PBBs. The user must wait either 20ms or until DQ6 stops

toggling before executing the fifth cycle, which is the read verify portion of the PPB Erase Command. The

sixth cycle outputs the status of the PPB Erase operation.

In the event that the erase PPB operation was not successful, the user can loop directly to the fourth cycle of

the All PPB Erase Command to perform the erase pulse and read verification again. After four unsuccessful

loops through the erase pulse and read verification cycles, the PPB erasing operation should be considered a

failure.

Note

All PPB must be preprogrammed prior to issuing the All PPB Erase Command.

Either poll DQ6 in the

small bank and wait for

it to stop toggling OR

wait 100

μs

DQ0 = 1?

Write 0x68 to SG+WP

Write 0x48 to SG+WP

Read from SG+WP

YES

Done

Error

Write 0xAA to 0x555

Write 0x55 to 0x2AA

Write 0x60 to 0x555

5th attempt?

Note: Reads from the

small bank at this point

return the status of the

operation, not read array

data.

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