User's Manual

HF Mifare Easy Module V1.0
ACG Identification Technologies GmbH 51
7.4.3.15 Write block
This command writes data to a block. A read after write is done automatically to
ensure correct writing.
Command
Command Data
'w' Block address (1 byte), valid range 00h – 40h
Data (n bytes)
'wb' Block address (1 byte)
Data (n bytes)
Answer
Answer Description
Data Block data (depends on tag type)
'F' Error: Write failure
'N' Error: No tag in field
'O' Error: Operation mode failure
Example
Command Description
wb0511223344 Writes data 11223344 on block 05.
7.4.3.15.1 Write failure 'F'
This error is displayed if bad transmission conditions are given. If the block address
exceeds the physical number of blocks of a tag this error is thrown.
7.4.3.15.2 No tag error 'N'
This error is returned if no tag is present or the card does not respond.