ACE25QC200GLTMTH datasheet(35/64 Pages) ACE

35 / 64 page

ACE25QC200GL

2M BIT SPI NOR FLASH

VER 1.1

Program / Erase and Security Instructions

Page Program (02h)

The Page Program instruction allows from one byte to 256 bytes (a page) of data to be programmed at

previously erased (FFh) memory locations. A Write Enable instruction must be executed before the device

will accept the Page Program Instruction (Status Register bit WEL= 1). The instruction is initiated by driving

the /CS pin low then shifting the instruction code “02h” followed by a 24-bit address (A23-A0) and at least

one data byte, into the SI pin. The /CS pin must be held low for the entire length of the instruction while data

is being sent to the device. The Page Program instruction sequence is shown in Figure25.

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 instruction is not executed.

As with the write and erase instructions, the /CS pin must be driven high after the eighth bit of the last byte

has been latched. If this is not done the Page Program instruction will not be executed. After /CS is driven

high, the self-timed Page Program instruction will commence for a time duration of tPP (See AC

Characteristics). While the Page Program cycle is in progress, the Read Status Register instruction may

still be accessed for checking the status of the WIP bit. The WIP bit is a 1 during the Page Program cycle

and becomes a 0 when the cycle is finished and the device is ready to accept other instructions again. After

the Page Program cycle has finished the Write Enable Latch (WEL) bit in the Status Register is cleared to 0.

The Page Program instruction will not be executed if the addressed page is protected by the Block Protect

(BP4, BP3, BP2, BP1, and BP0) bits

Figure25. Page Program Instruction

ACE25QC200GLTMTH Datasheet(PDF) 35 Page - ACE Technology Co., LTD.