ib technology

12

Hitag 1 Serial Number and Configuration Bytes

Page 0 (Serial Number):

Byte:

3

2

1

0

Page 1 (Configuration Bytes):

Byte:

3

2

1

0

The Hitag 1 configuration bytes control whether the memory blocks are read/write or locked

for read only access. Note that bytes 2 and 3 of the configuration page are not used and are

currently available for general read/write use.

CON 0 (Page 1, byte 0)

CON 1 (Page 1, byte 1)

b7 b6 b5 b4 b3 b2 b1 b0

b7 b6 b5 b4 b3 b2 b1 b0

1

1

1

0 = Block 7 read only

Reserved

1 = Block 7 read/write

Reserved

0 = Block 6 read only

1 = Block 6 read /write

Reserved

0 = Block 5 read only

0 = Configuration (Page 1) read only

1 = Block 5 read/write

1 = Configuration (Page 1) read/write

0 = Block 4 read only

Reserved

1 = Block 4 read/write

Reserved

0 = Block 3 read only

1 = Block 3 read/write (not used)

Reserved

0 = Block 2 read only

1 = Block 2 read/write (not used)

Note that these configuration bits are OTP. Once they are set to read-only the Hitag 1

transponder is hardware protected and they can never be changed.

Note that the “Reserved” bits of Configuration Byte 1 must not be altered. Page 1 must be

read first and the bits that can be changed masked on/off before writing back.

MSB

LSB

(xxxxxxxx)

msb

lsb

MSB

LSB

Read/Write Read/Write CON1

CON0