ACE25C320G Datasheet, PDF (19/37 Pages) ACE Technology Co., LTD. – Uniform SECTOR Dual and Quad Serial Flash

ACE25C320G
Uniform SECTOR Dual and Quad Serial Flash
Page Program (PP) (02H)
The Page Program (PP) command is for programming the memory. A Write Enable (WREN)
command must previously have been executed to set the Write Enable Latch (WEL) bit before
sending the Page Program command.
The Page Program (PP) command is entered by driving CS# Low, followed by the command code,
three address bytes and at least one data byte on SI. If the 8 least significant address bits (A7-A0) are
not all zero, all transmitted data that goes beyond the end of the current page are programmed from
the start address of the same page (from the address whose 8 least significant bits (A7-A0) are all
zero). CS# must be driven low for the entire duration of the sequence. The Page Program command
sequence: CS# goes low sending Page Program command 3-byte address on SI at least 1 byte data
on SI CS# goes high. The command sequence is shown in Figure14. If more than 256 bytes are sent
to the device, previously latched data are discarded and the last 256 data bytes are guaranteed to be
programmed correctly within the same page. If less than 256 data bytes are sent to device, they are
correctly programmed at the requested addresses without having any effects on the other bytes of the
same page. CS# must be driven high after the eighth bit of the last data byte has been latched in;
otherwise the Page Program (PP) command is not executed.
As soon as CS# is driven high, the self-timed Page Program cycle (whose duration is tPP) is initiated.
While the Page Program cycle is in progress, the Status Register may be read to check the value of
the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Page
Program cycle, and is 0 when it is completed. At some unspecified time before the cycle is completed,
the Write Enable Latch (WEL) bit is reset.
A Page Program (PP) command applied to a page which is protected by the Block Protect (SEC, TB,
BP2, BP1,BP0) is not executed.
Figure 14. Page Program Sequence Diagram
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