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S29CD032J bảng dữ liệu(PDF) 42 Page - SPANSION

tên linh kiện S29CD032J
Giải thích chi tiết về linh kiện  32/16 Megabit CMOS 2.6 Volt or 3.3 Volt-only Simultaneous Read/Write, Dual Boot, Burst Mode Flash Memory with VersatileI/O
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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
NO
YES
NO
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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