ATMEGA2561-16AI Atmel, ATMEGA2561-16AI Datasheet - Page 347
![IC AVR MCU 256K 16MHZ 64TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA2561-16AI
Manufacturer Part Number
ATMEGA2561-16AI
Description
IC AVR MCU 256K 16MHZ 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA2561-16AI
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
Program Memory Size
256KB (128K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Manufacturer
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29.7.13
29.7.14
29.7.15
2549M–AVR–09/10
Reading the Signature Bytes
Reading the Calibration Byte
Parallel Programming Characteristics
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 341
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”.
The algorithm for reading the Calibration byte is as follows (refer to
page 341
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”.
Figure 29-7. Parallel Programming Timing, Including some General Timing Requirements
(DATA, XA0/1, BS1, BS2)
for details on Command and Address loading):
for details on Command and Address loading):
Data & Contol
RDY/BSY
Extended Fuse Byte
PAGEL
Fuse Low Byte
XTAL1
Fuse High Byte
WR
Lock Bits
t
t
BVPH
DVXH
ATmega640/1280/1281/2560/2561
BS2
BS2
t
t
XHXL
PHPL
0
1
0
1
t
t
t
t
XLDX
PLBX
XLWL
PLWL
t
BVWL
BS1
t
WLWH
WLRL
0
1
“Programming the Flash” on
“Programming the Flash” on
DATA
t
WLBX
t
WLRH
347
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