ib technology

9

Read EM4102 Tag

Command to read 5 bytes of data from EM4102 memory array. If the read was successful,

indicated by acknowledge status flags then five bytes of tag data follow.

B7

B0

Command:

0 1 0 1 0 0 1 0

(0x52)

Argument1:

x x x x x x

x x

(Dummy Page number e.g 00)

Acknowledge:

1 1 F F F F F X

(F = Status flags)

Data only follows if read was successful

Reply1:

D D D D D D D D

(D = msb data read from EM4102)

Reply2:

D D D D D D D D

Reply3:

D D D D D D D D

Reply4:

D D D D D D D D

Reply5:

D D D D D D D D

(D = lsb data read from EM4102)

Note that for the Read Tag command, if an error flag has been set in the Acknowledge code

then there will be NO following data.

Tag STATUS

Command to return Tag status.

B7

B0

Command:

0 1 0 1 0 0 1 1

(0x53)

Acknowledge:

1 1 F F F F F X

(F = Status flags)

Message

Command to return product and firmware identifier string to host.

B7

B0

Command:

0 1 1 1 1 0 1 0

(0x7A)

Reply:

“c IDE RD MC200/H400x (SECM200C_WAX_LP V1.xx) DD/MM/YY” 0x00

Returned string identifies author, product descriptor, project name, firmware version number

and date of last software change. Note that the string is always NULL terminated. The string

begins with a unique lower case character that can be used to identify a particular version of

Micro RWD.