ATMEGA8-16AI SL383 Atmel, ATMEGA8-16AI SL383 Datasheet - Page 234

• Manufacturer Part Number: ATMEGA8-16AI SL383
• Description: Semiconductors and Actives, Microprocessors, Microcontrollers
• Manufacturer: Atmel

Reading the Signature
Bytes
Reading the
Calibration Byte
Parallel Programming
Characteristics
234
ATmega8(L)
The algorithm for reading the Signature bytes is as follows (refer to
page 229
1. A: Load Command “0000 1000”.
2. 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”.
The algorithm for reading the Calibration bytes is as follows (refer to
page 229
1. A: Load Command “0000 1000”.
2. 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”.
Figure 109. Parallel Programming Timing, Including some General Timing Requirements
Figure 110. Parallel Programming Timing, Loading Sequence with Timing Requirements
Note:
PAGEL
XTAL1
(DATA, XA0/1, BS1, BS2)
DATA
BS1
XA0
XA1
1. The timing requirements shown in
for details on Command and Address loading):
for details on Command and Address loading):
ing operation.
Data & Contol
RDY/BSY
ADDR0 (Low Byte)
LOAD ADDRESS
PAGEL
XTAL1
(LOW BYTE)
WR
t
t
BVPH
DVXH
(LOW BYTE)
LOAD DATA
DATA (Low Byte)
t
t
XHXL
PHPL
Figure 109
t
t
t
t
t
XLXH
XLDX
PLBX
XLWL
PLWL
(i.e., t
t
BVWL
(HIGH BYTE)
LOAD DATA
DVXH
DATA (High Byte)
t
WL WH
t
XLPH
WLRL
, t
LOAD DATA
XHXL
“Programming the Flash” on
“Programming the Flash” on
, and t
t
PLXH
t
WLBX
XLDX
LOAD ADDRESS
(LOW BYTE)
) also apply to load-
ADDR1 (Low Byte)
2486W–AVR–02/10
t
WLRH
(1)