MX25L1635D
sending the Block Erase (BE). Any address of the block (see table 3) is a valid address for Block Erase (BE) instruction.
The CS# must go high exactly at the byte boundary (the eighth bit of address 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 23)
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 Sector Erase cycle is in progress. The WIP sets 1 during the tBE timing, and
sets 0 when Sector Erase Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If the page is protected by
BP3, BP2, BP1, BP0 bits, the Block Erase (BE) instruction will not be executed on the page.
(12) Chip Erase (CE)
TheChipErase(CE)instructionisforerasingthedataofthewholechiptobe"1".AWriteEnable(WREN)instructionmust
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 (the eighth bit of address byte been latched-in), 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 Figure
24)
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
sets0whenChipEraseCycleiscompleted, andtheWriteEnableLatch(WEL)bitisreset. Ifthechipisprotectedby BP3,
BP2, BP1, BP0 bits, the Chip Erase (CE) instruction will not be executed. It will be only executed when BP3, BP2, BP1,
BP0 all set to "0".
(13) Page Program (PP)
The Page Program (PP) instruction is for programming the memory to be "0". A Write Enable (WREN) instruction must
execute to set the Write Enable Latch (WEL) bit before sending the Page Program (PP). The device programs only the
last 256 data bytes sent to the device. If the entire 256 data bytes are going to be programmed, A7-A0 (The eight least
significant address bits) should be set to 0. If the eight least significant address bits (A7-A0) are not all 0, all transmitted
datagoingbeyondtheendofthecurrentpageareprogrammedfromthestartaddressofthesamepage(fromtheaddress
A7-A0areall0). Ifmorethan256bytesaresenttothedevice, thedataofthelast256-byteisprogrammedattherequest
page and previous data will be disregarded. If less than 256 bytes are sent to the device, the data is programmed at the
requested address of the page without effect on other address of the same page.
ThesequenceofissuingPPinstructionis:CS#goeslow->sendingPPinstructioncode->3-byteaddressonSI->atleast
1-byte on data on SI-> CS# goes high. (see Figure 19)
The CS# must be kept to low during the whole Page Program cycle; The CS# must go high exactly at the byte boundary(
the eighth bit of data being latched in), otherwise the instruction will be rejected and will not be executed.
Theself-timedPageProgramCycletime(tPP)isinitiatedassoonasChipSelect(CS#)goeshigh. TheWriteinProgress
(WIP) bit still can be check out during the Page Program cycle is in progress. The WIP sets 1 during the tPP timing, and
sets 0 when Page Program Cycle is completed, and the Write Enable Latch (WEL) bit is reset. If the page is protected
by BP3, BP2, BP1, BP0 bits, the Page Program (PP) instruction will not be executed.
P/N:PM1374
REV. 1.5, OCT. 01, 2008
20
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