ISD5216PI datasheet(27/75 Pages) WINBOND

27 / 75 page

ISD5216

Publication Release Date: Jan. 31, 2006

- 27 -

Revision B.4

As with Digital Write, Digital Read can be done a “block” at a time. Thus, only 64 bits need to be read

in each Digital Read command sequence.

7.6.3. Erasing Data

The Digital Erase command can only erase an entire page at a time. This means that the D0 or D1

command only needs to include the 11-bit page address; the 5-bit for block address are left at 00000.

Once a page has been erased, each block may be written separately, 64 bits at a time. But, if a block

has been previously written, then the entire page of 2048 bits must be erased in order to re-write (or

change) a block.

While erasing data, the RAC pin will have a pulse at the end of each erased page, when the stop

erase command is sent, the device will stop erasing at the end of the current page. To erase a single

page, the stop command should be sent immediately after the start erase command. To erase multiple

pages, count pulses on the RAC pin and send the stop command after n-1 RAC pulses have been

detected where n is the number of pages to erase.

A sequence might look like:

read the entire page

store it in RAM

change the desired bit(s)

erase the page

write the new data from RAM to the entire page

7.6.4. Load Configuration Registers

To load the configuration registers, send the LOAD CFG command followed by the two configuration

bytes with the most significant byte first.

The following tables provide a summary of the bits. There are three configuration registers: CFG0,

CFG1 and CFG2. Thus, there are six 8-bit bytes to be loaded during the set-up of the device.

ISD5216PI Datasheet(PDF) 27 Page - Winbond