SST26VF016 datasheet(21/39 Pages) SST

21 / 39 page

DS-25017A

04/11

Serial Quad I/O (SQI) Flash Memory

SST26VF016 / SST26VF032

Data Sheet

A Microchip Technology Company

Page-Program

The Page-Program instruction programs up to 256 Bytes of data in the memory. The data for the

selected page address must be in the erased state (FFH) before initiating the Page-Program operation.

A Page-Program applied to a protected memory area will be ignored. Prior to the program operation,

execute the WREN instruction.

To execute a Page-Program operation, the host drives CE# low then sends the Page Program com-

mand cycle (02H), three address cycles followed by the data to be programmed, then drives CE# high.

The programmed data must be between 1 to 256 Bytes and in whole Byte increments; sending an odd

number of nibbles will cause the last nibble to be ignored. Each cycle is two nibbles (clocks) long, most

significant bit first. Poll the BUSY bit in the Status register or wait TPP for the completion of the internal,

self-timed, Page-Program operation. See Figure 18 for the Page-Program sequence.

When executing Page-Program, the memory range for the SST26VF016/032 is divided into 256 Byte

page boundaries. The device handles shifting of more than 256 Bytes of data by maintaining the last

256 Bytes of data as the correct data to be programmed. If the target address for the Page-Program

instruction is not the beginning of the page boundary (A7:A0 are not all zero), and the number of data

input exceeds or overlaps the end of the address of the page boundary, the excess data inputs wrap

around and will be programmed at the start of that target page.

Figure 18:Page-Program Sequence

Write-Suspend and Write-Resume

Write-Suspend allows the interruption of Sector-Erase, Block-Erase or Page-Program operations in

order to erase, program, or read data in another portion of memory. The original operation can be con-

tinued with the Write-Resume command.

Only one write operation can be suspended at a time; if an operation is already suspended, the device

will ignore the Write-Suspend command. Write-Suspend during Chip-Erase is ignored; Chip-Erase is

not a valid command while a write is suspended.

1359 F10.0

MODE 3

SCK

SIO(3:0)

CE#

C1 C0

MODE 0

A5 A4

MSN LSN

A3 A2

A1 A0

H0 L0

H1 L1

H2 L2

542

HN LN

Data Byte 0 Data Byte 1 Data Byte 2

Data Byte 255

Note: MSN = Most Significant Nibble, LSN = Least Significant Nibble

C[1:0] = 02H

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