Omron V720S-BC5D4A User Manual page 31

2-4 Memory Map of Tag
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
Byte 0
Byte 1
Byte 2
Byte 3
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
Byte 0
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
Byte 0
Byte 1
Byte 2
Byte 3
MSB
1 1 1 1
Page FE Page FD
1 1 1 1
Page 02 Page 01
1 1 1 1
Page 06 Page 05
1 1 1 1
Page 0A Page 09
MSB
× × ×
× × ×
× × ×
× × ×
MSB
Application ID
0 0 0
Page FC Page FB
1 1 1
Page 00 Page FF
1 1 1
Page 04 Page 03
1 1 1
Page 08 Page 07
× q q e
× × × ×
× × × ×
× × × ×
Family code
User area
User area
2-4
LSB
0
1
1
1
LSB
e
×
×
×
LSB
2-15