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IS25LQ032C

32Mbit Single Operating Voltage Serial Flash Memory With 104 MHz Dual- or 100MHz Quad-Output SPI Bus Interface

Integrated Silicon Solution 

IS25LQ032C

DEVICE OPERATION (CONTINUED)

Quad Input Page Program operation

The Quad Input Page Program instruction allows up

to 256 bytes data to be programmed into memory in

a single operation with four pins (IO0, IO1, IO2 and

IO3). The destination of the memory to be

programmed must be outside the protected memory

area set by the Block Protection (BP3, BP2, BP1,

BP0) bits. A Quad Input Page Program instruction

which attempts to program into a page that is write-

protected will be ignored. Before the execution of

Quad Input Page Program instruction, the QE bit in

the status register must be set to “1” and the Write

Enable Latch (WEL) must be enabled through a Write

Enable (WREN) instruction.

The Quad Input Page Program instruction code,

three address bytes and program data (1 to 256

bytes) are input via the four pins (IO0, IO1, IO2 and

IO3). Program operation will start immediately after

the CE# is brought high, otherwise the Quad Input

Page Program instruction will not be executed. The

internal control logic automatically handles the

programming voltages and timing. During a program

operation, all instructions will be ignored except the

RDSR instruction. The progress or completion of the

program operation can be determined by reading the

WIP bit in Status Register via a RDSR instruction. If

the WIP bit is “1”, the program operation is still in

progress. If WIP bit is “0”, the program operation has

completed.

If more than 256 bytes data are sent to a device, the

address counter rolls over within the same page, the

previously latched data are discarded, and the last

256 bytes data are kept to be programmed into the

page. The starting byte can be anywhere within the

page. When the end of the page is reached, the

address will wrap around to the beginning of the

same page. If the data to be programmed are less

than a full page, the data of all other bytes on the

same page will remain unchanged.

Note: A program operation can alter “1”s into “0”s,

but an erase operation is required to change “0”s

back to “1”s. A byte cannot be reprogrammed without

first erasing the whole sector or block.

Integrated Silicon Solution, Inc.- www.issi.com

Rev. A

30

08/20/2012

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