DM160232 Serial Memory Single-Wire Evaluation Kit User’s Guide
2018 Microchip Technology Inc.
DS20005939A-page 26
FIGURE 3-17:
PROGRAM
3.11.6
REFRESH
The
REFRESH
button reads the Serial EEPROM memory array and Security register
of the installed device and then populates the GUI memory array and Security register
with that data. If there is data in the internal GUI buffer (
yellow
-shaded cell) when the
Refresh feature is used, that data will be replaced with the data read from the Serial
EEPROM. After the completion of any write operation to the Serial EERPOM, the GUI
will automatically update the GUI memory array and Security register using the Refresh
feature.
FIGURE 3-18:
REFRESH
3.12
SECURITY REGISTER
The Security register consists of a factory-programmed unique serial number in the
lower 8 bytes (address 0x00h to 0x07h), an 8-byte page that is reserved for future use
with data of 0xFFh (address 0x08 to 0x0F), and a writable portion in the upper 16 bytes
(address 0x10h to 0x1Fh) of the Security register. The
red
-shaded cells indicate they
are locked and cannot be modified by the user;
green
-shaded cells indicate that the cell
or cells are unlocked and can be modified by the user;
yellow
shading indicates that the
memory array cell or cells have been changed in the internal GUI buffer and have not
been written to the Serial EEPROM.
Note:
If a new device is installed while leaving the USB Base Board connected to
the user’s PC, it is recommended to use the Device Query feature instead
of the Refresh feature to ensure robust GUI operation.
Write checkboxes
Lock checkboxes
Refresh status bar