AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 380
AT90USB1286-16MU
Manufacturer Part Number
AT90USB1286-16MU
Description
Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90USB1286-16MU.pdf
(434 pages)
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29.6.12
29.6.13
29.6.14
380
AT90USB64/128
Reading the Fuse and Lock Bits
Reading the Signature Bytes
Reading the Calibration Byte
The algorithm for reading the Fuse and Lock bits is as follows (refer to
on page 375
Figure 29-6. Mapping Between BS1, BS2 and the Fuse and Lock Bits During Read
The algorithm for reading the Signature bytes is as follows (refer to
page 375
The algorithm for reading the Calibration byte is as follows (refer to
page 375
1. A: Load Command “0000 0100”.
2. Set OE to “0”, and BS2, BS1 to “00”. The status of the Fuse Low bits can now be read
3. Set OE to “0”, and BS2, BS1 to “11”. The status of the Fuse High bits can now be read
4. Set OE to “0”, and BS2, BS1 to “10”. The status of the Extended Fuse bits can now be
5. Set OE to “0”, and BS2, BS1 to “01”. The status of the Lock bits can now be read at
6. Set OE to “1”.
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte (0x00 - 0x02).
3. Set OE to “0”, and BS to “0”. The selected Signature byte can now be read at DATA.
4. Set OE to “1”.
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte, 0x00.
3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.
4. Set OE to “1”.
at DATA (“0” means programmed).
at DATA (“0” means programmed).
read at DATA (“0” means programmed).
DATA (“0” means programmed).
for details on Command and Address loading):
for details on Command and Address loading):
for details on Command loading):
Extended Fuse Byte
Fuse Low Byte
Fuse High Byte
Lock Bits
BS2
BS2
0
1
0
1
BS1
0
1
“Programming the Flash” on
“Programming the Flash” on
“Programming the Flash”
DATA
7593A–AVR–02/06
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