MX25U4035
MX25U8035
(11) Block Erase (BE32K)
The Block Erase (BE32K) instruction is for erasing the data of the chosen block to be "1". The instruction is used
for 32K-byte block erase operation. A Write Enable (WREN) instruction must execute to set the Write Enable Latch
(WEL) bit before sending the Block Erase (BE32K). Any address of the block (see table of memory organization) is
a valid address for Block Erase (BE32K) instruction. The CS# must go high exactly at the byte boundary (the latest
eighth of address byte been latched-in); otherwise, the instruction will be rejected and not executed.
The sequence of issuing BE32K instruction is: CS# goes low → sending BE32K instruction code→ 3-byte address
on SI→ CS# goes high. (see Figure 24)
The self-timed Block Erase Cycle time (tBE32K) is initiated as soon as Chip Select (CS#) goes high. The Write in
Progress (WIP) bit still can be check out during the Block Erase cycle is in progress. The WIP sets 1 during the
tBE32K timing, and sets 0 when Block Erase Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If
the block is protected by BP3, BP2, BP1, BP0 bits, the Block Erase (tBE32K) instruction will not be executed on the
block.
(12) Block Erase (BE)
The Block Erase (BE) instruction is for erasing the data of the chosen block to be "1". The instruction is used for
64K-byte block erase operation. A Write Enable (WREN) instruction must execute to set the Write Enable Latch (WEL)
bit before sending the Block Erase (BE). Any address of the block (see table of memory organization) is a valid ad-
dress for Block Erase (BE) instruction. The CS# must go high exactly at the byte boundary (the latest eighth of ad-
dress byte been latched-in); otherwise, the instruction will be rejected and not executed.
The sequence of issuing BE instruction is: CS# goes low→ sending BE instruction code→ 3-byte address on SI
→CS# goes high. (see Figure 25)
The self-timed Block Erase Cycle time (tBE) is initiated as soon as Chip Select (CS#) goes high. The Write in
Progress (WIP) bit still can be check out during the Block Erase cycle is in progress. The WIP sets 1 during the tBE
timing, and sets 0 when Block Erase Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If the block
is protected by BP3, BP2, BP1, BP0 bits, the Block Erase (BE) instruction will not be executed on the block.
(13) Chip Erase (CE)
The Chip Erase (CE) instruction is for erasing the data of the whole chip to be "1". A Write Enable (WREN) instruc-
tion must execute to set the Write Enable Latch (WEL) bit before sending the Chip Erase (CE). The CS# must go
high exactly at the byte boundary, otherwise the instruction will be rejected and not executed.
The sequence of issuing CE instruction is: CS# goes low→ sending CE instruction code→ CS# goes high. (see Fig-
ure 26)
The self-timed Chip Erase Cycle time (tCE) is initiated as soon as Chip Select (CS#) goes high. The Write in
Progress (WIP) bit still can be check out during the Chip Erase cycle is in progress. The WIP sets 1 during the tCE
timing, and sets 0 when Chip Erase Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If the chip
is protected by BP2, BP1, BP0 bits, the Chip Erase (CE) instruction will not be executed. It will be only executed
when BP2, BP1, BP0 all set to "0".
P/N: PM1394
REV. 1.0, MAR. 09, 2009
22
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