atmega323l ATMEL Corporation, atmega323l Datasheet - Page 195

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Reading the Signature Bytes
Reading the Calibration Byte
Parallel Programming
Characteristics
1457G–AVR–09/03
3. Set OE to “0”, BS2 to “1” and BS1 to “1”. The status of the Fuse High bits can
4. Set OE to “0”, BS2 to “0” and BS1 to “1”. The status of the Lock bits can now be
5. Set OE to “1”.
The algorithm for reading the Signature bytes is as follows (refer to Programming the
Flash for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. C: Load Address Low Byte ($00 - $02).
3. Set OE to “0”, and BS1 to “0”. The selected Signature byte can now be read at
4. Set OE to “1”.
The algorithm for reading the Calibration byte is as follows (refer to Programming the
Flash for details on Command and Address loading):
1. A: Load Command “0000 1000”.
2. C: Load Address Low Byte, $00.
3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.
4. Set OE to “1”.
Figure 97. Parallel Programming Timing
(DATA, XA0/1, BS1, BS2)
now be read at DATA (“0” means programmed).
Bit 7 = OCDEN Fuse bit
Bit 6 = JTAGEN Fuse bit
Bit 5 = SPIEN Fuse bit
Bit 3 = EESAVE Fuse bit
Bit 2..1 = BOOTSZ1..0 Fuse bits
Bit 0 = BOOTRST Fuse bit
read at DATA (“0” means programmed).
Bit 5 = Boot Lock bit12
Bit 4 = Boot Lock bit11
Bit 3 = Boot Lock bit02
Bit 2 = Boot Lock bit01
Bit 1 = Lock bit2
Bit 0 = Lock bit1
DATA.
Data & Contol
RDY/BSY
PAGEL
XTAL1
DATA
WR
OE
t
t
BVPH
DVXH
t
t
XHXL
PHPL
t
t
t
t
t
XLOL
XLWL
XLDX
PLBX
PLWL
t
BVWL
t
WLWH
WLRL
t
OLDV
ATmega323(L)
t
t
WLRH
OHDZ
t
RHBX
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