Datasheet

2. Set OE to “0”, BS2 to “0” and BS1 to “0”. The status of the Fuse Low bits can now be read at DATA

(“0” means programmed).

3. Set OE to “0”, BS2 to “1” and BS1 to “1”. The status of the Fuse High bits can now be read at DATA

(“0” means programmed).

4. Set OE to “0”, BS2 to “1”, and BS1 to “0”. The status of the Extended Fuse bits can now be read at

DATA (“0” means programmed).

5. Set OE to “0”, BS2 to “0” and BS1 to “1”. The status of the Lock bits can now be read at DATA (“0”

means programmed).

6. Set OE to “1”.

Figure 31-5 Mapping Between BS1, BS2 and the Fuse and Lock Bits During Read

Lock Bits

BS2

Fuse High Byte

BS1

DATA

Fuse Low Byte

BS2

Extended Fuse Byte

31.6.13. Reading the Signature Bytes

The algorithm for reading the Signature bytes is as follows (Please refer to Programming the Flash on

page 388 for details on Command and Address loading):

1. Step A: Load Command “0000 1000”.

2. Step B: Load Address Low Byte (0x00 - 0x02).

3. Set OE to “0”, and BS1 to “0”. The selected Signature byte can now be read at DATA.

4. Set OE to “1”.

31.6.14. Reading the Calibration Byte

The algorithm for reading the Calibration byte is as follows (Please refer to Programming the Flash on

page 388 for details on Command and Address loading):

1. Step A: Load Command “0000 1000”.

2. Step B: Load Address Low byte, (0x00 - 0x03).

3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.

4. Set OE to “1”.

31.6.15. Parallel Programming Characteristics

For characteristics of the Parallel Programming, please refer to Parallel Programming Characteristics.