User's Manual

2-4 Memory Map of Tag
2-4
2-15
2) System area of I.CODE2 chip
１）SNR (pages FB and FC)
SNR is a Tag-specific code and has been written into the memory
during the chip production process.
The IC is shipped with this page write-access inhibited (refer to page
FD); there is no way of making this page rewritable by the user.
２）Write-access conditions (page FD)
The pages are write-inhibited permanently if they are so indicated in
the memory map. The factory settings are as follow. If the two bits of a
particular page are 0,0, that page is write-protected.
Page FD MSB LSB
Byte 0 1 1 1 1 0 0 0 0
Page FE Page FD Page FC Page FB
Byte 1 1 1 1 1 1 1 1 1
Page 02 Page 01 Page 00 Page FF
Byte 2 1 1 1 1 1 1 1 1
Page 06 Page 05 Page 04 Page 03
Byte 3 1 1 1 1 1 1 1 1
Page 0A Page 09 Page 08 Page 07
３）QUIET/EAS (page FE)
QUIET mode :All the functions of a tag are suspended completely. Use
Reset Quiet Bit to resume these functions.
(q=0: QUIET mode is disabled; q=1: QUIET mode is enabled)
EAS mode : Inhibition/permission of EAS function
(e=0: EAS mode is disabled; e=1: EAS mode is enabled)
Page FE MSB LSB
Byte 0
× × × × q q e e
Byte 1
× × × × × × × ×
Byte 2
× × × × × × × ×
Byte 3
× × × × × × × ×
*The pages marked with "×" in the table above are reserved for future
use.
４）Family code/application ID (page FF)
Family code and application ID are special areas for enabling the user to
identify an IC that is suitable to a specific user application.
Block FF MSB LSB
Byte 0 Family code
Byte 1 Application ID
Byte 2 User area
Byte 3 User area