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Manual ARE i2.0x LF release V2
2.3.18 LD (EM4305 chip specific)
After the chip is configured correctly, it may be necessary to lock specific memory blocks of EM 4305. Memory blocks from 0
to 13 can be locked. Memory pages 14 and 15 serve as lock data (see chip data sheet for details).
Protection word 1 is factory set, as it contains the chip UID. Memory pages 0, 2-13 can be locked by the user. This is OTP, so
once locked, it can not be undone.
Input format:
LD<SP>00008072<CR>
Hex:
4C
ASCII:
'L'
Output (example): ACK<CR>
Hex:
41
ASCII:
'A'
This answer is sent if lock data went ok.
Output (example): NAK<CR>
Hex:
4E
ASCII:
'N'
This answer is sent if something went wrong during lock data.
Above example locks memory pages 4, 5 and 6. Memory page 1 is factory set, as is the protection status bit.
Manual ARE i2.0x LF release V2.docx
44
20
30
'D'
<SP>
'0'
43
4B
0D
'C'
'K'
<CR>
41
4B
0D
'A'
'K'
<CR>
...
30
37
...
'0'
'7'
Version: 13
Page: 23 / 34
32
0D
'2'
<CR>
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