ATXP032 datasheet(32/113 Pages) DIALOG

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ATXP032

DS-ATXP032–114I–4-2020

Figure 9-6.

Page Program in Octal Mode — DDR

Note that an even number of bytes are programmed when using the Page Program command in octal mode -

DDR.

9.2

Buffer Write (84h)

Utilizing the Buffer Write (84h) command allows data clocked in from the I/O pins to be written directly into the

internal write buffer without starting a write to the Flash array at the same time. This write operation is faster than a

regular byte or page write. It is typically used to write small amounts of data at the time to the buffer, and then

starting a write operation to the Flash memory when the buffer is full. The Buffer to Main Memory Page Program

without Built-In Erase (88h) command is then used to write the buffer to the Flash memory.

To load data into a buffer, the 84h command must be clocked into the device followed by 4 address bytes

comprised of 24 dummy bits and 8 buffer address bits (BFA

7 - BFA0). The eight buffer address bits specify the first

byte in the buffer to be written.

After the last address byte has been clocked into the device, data can then be clocked in on subsequent clock

cycles. If the end of the buffer is reached, the device wraps around back to the beginning of the buffer. Data

continues to be loaded into the buffer until a low-to-high transition is detected on the CS pin.

Note that the buffer is not automatically cleared prior to starting a Buffer Write command. This allows multiple

Buffer Write commands to be performed to update different parts of the buffer before writing the buffer to the Flash

memory, or to update the same buffer locations multiple times before writing to Flash memory. Buffer locations

which are not updated will contain whatever data is left in the buffer from the previous write operation. The Buffer to

Main Memory Page Program without Built-In Erase (88h) command writes the full 256-byte page, even if less than

256 bytes were written to the buffer.

Note also that the Buffer to Main Memory Page Program without Built-In Erase (88h) command should be

executed before any Byte/Page Program (02h) command is issued. These commands share the same write buffer,

so a Byte/Page Program (02h) command overwrites whatever data is written by the Buffer Write (84h) command.

Data In

Byte1 Byte2

Address

Bits A

-A

02h

Opcode

I/O7-0

SCK

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