ATA6602 ATMEL Corporation, ATA6602 Datasheet - Page 309
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ATA6602
Manufacturer Part Number
ATA6602
Description
LIN and Microcontroller System-In-Package: LIN Transceiver, integrated 5V/50 mA voltage regulator, window watchdog and automotive AVR ATmega88 (8 kBytes Flash); green QFN48 package.
Manufacturer
ATMEL Corporation
Datasheet
1.ATA6602.pdf
(362 pages)
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4.24.7.11
4.24.7.12
4921C–AUTO–01/07
Programming the Lock Bits
Reading the Fuse and Lock Bits
Figure 4-121. Programming the FUSES Waveforms
The algorithm for programming the Lock bits is as follows (refer to
page 304
The Lock bits can only be cleared by executing Chip Erase.
The algorithm for reading the Fuse and Lock bits is as follows (refer to
on page 304
1. A: Load Command “0010 0000”.
2. C: Load Data Low Byte. Bit n = “0” programs the Lock bit. If LB mode 3 is programmed
3. Give WR a negative pulse and wait for RDY/BSY to go high.
1. A: Load Command “0000 0100”.
2. Set OE to “0”, BS2 to “0” and BS1 to “0”. The status of the Fuse Low bits can now be
3. Set OE to “0”, BS2 to “1” and BS1 to “1”. The status of the Fuse High bits can now be
4. Set OE to “0”, BS2 to “1”, and BS1 to “0”. The status of the Extended Fuse bits can now
5. Set OE to “0”, BS2 to “0” and BS1 to “1”. The status of the Lock bits can now be read at
6. Set OE to “1”.
RESET +12V
RDY/BSY
PAGEL
(LB1 and LB2 is programmed), it is not possible to program the Boot Lock bits by any
External Programming mode.
read at DATA (“0” means programmed).
read at DATA (“0” means programmed).
be read at DATA (“0” means programmed).
DATA (“0” means programmed).
XTAL1
DATA
XA1
XA0
BS1
BS2
WR
OE
for details on Command and Data loading):
for details on Command loading):
0x40
A
DATA
C
Write Fuse Low byte
XX
0x40
A
DATA
C
Write Fuse high byte
XX
ATA6602/ATA6603
“Programming the Flash” on
0x40
A
“Programming the Flash”
DATA
C
Write Extended Fuse byte
XX
309
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