ib technology

9

Micro RWD H1/S Protocol

The MicroRWD H1/S Reader mode is a complete read / write and tag acceptance solution for

Hitag 1, Hitag S256 and Hitag S2048 RFID transponders (in Plain Memory mode).

Write Tag Page

Command to write 4 bytes of data to HT1 32 bit page. If the write was unsuccessful (invalid

tag or out of field) then Status flags in acknowledge byte indicate error.

B7

B0

Command:

0 1 0 1 0 1 1 1

(ASCII “W”, 0x57)

Argument1:

x x N N N N N N

(N = HT1 page address 0-63)

Argument2:

D D D D D D D D

(D = msb data to write to HT1)

Argument3:

D D D D D D D D

Argument4:

D D D D D D D D

Argument5:

D D D D D D D D

(D = lsb data to write to HT1)

Acknowledge:

1 1 F F F F F X

(F = Status flags)

Write Tag Block

Command to write up to 16 bytes of data to HT1 memory. A Block is made up of four pages

(each page being 4 bytes of data). If the specified page lies on the block boundary then all 16

bytes (4 pages) can be written. If the specified page is on the block boundary + 1 then 12

bytes (3 pages) can be written.

In this way 16, 12, 8 or 4 bytes of data can be stored on the tag depending on the page number

and it’s position within the block. If the write was unsuccessful (invalid tag or out of field)

then Status flags in acknowledge byte indicate error.

B7

B0

Command:

0 1 1 1 0 1 1 1

(ASCII “w”, 0x77)

Argument1:

x x N N N N N N

(N = HT1 page address 0-63)

Argument2:

D D D D D D D D

(D = msb data to write to HT1)

Argument3:

D D D D D D D D

(PAGE N DATA)

Argument4:

D D D D D D D D

Argument5:

D D D D D D D D

(D = lsb data to write to HT1)

|

|

Up to 16 bytes can be specified depending on page address N

|

ie. Perform PAGE/4 => if remainder (mod) = 0 then full block (16 bytes)

|

if remainder = 1 then 12 bytes sent

|

if remainder = 2 then 8 bytes sent

|

if remainder = 3 then 4 bytes sent

V

Argument14:

D D D D D D D D

(D = msb data to write to HT1)

Argument15:

D D D D D D D D

(PAGE N+3 DATA)

Argument16:

D D D D D D D D

Argument17:

D D D D D D D D

(D = lsb data to write to HT1)

Acknowledge:

1 1 F F F F F X

(F = Status flags)