ATMEGA128A-MUR Atmel, ATMEGA128A-MUR Datasheet - Page 303
![MCU AVR 128K FLASH 16MHZ 64QFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
ATMEGA128A-MUR
Manufacturer Part Number
ATMEGA128A-MUR
Description
MCU AVR 128K FLASH 16MHZ 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA128A-MUR
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
53
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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26.6.13
26.6.14
26.6.15
26.7
8151H–AVR–02/11
Serial Downloading
Reading the Signature Bytes
Reading the Calibration Byte
Parallel Programming Characteristics
Figure 26-6. Mapping Between BS1, BS2 and the Fuse- and Lock Bits During Read
The algorithm for reading the Signature bytes is as follows (refer to Programming the Flash for
details on Command and Address loading):
The algorithm for reading the Calibration byte is as follows (refer to Programming the Flash for
details on Command and Address loading):
See
Both the Flash and EEPROM memory arrays can be programmed using the serial SPI bus while
RESET is pulled to GND. The serial interface consists of pins SCK, MOSI (input) and MISO (out-
put). After RESET is set low, the Programming Enable instruction needs to be executed first
before program/erase operations can be executed. NOTE, in
mapping for SPI programming is listed. Not all parts use the SPI pins dedicated for the internal
SPI interface. Note that throughout the description about Serial downloading, MOSI and MISO
are used to describe the serial data in and serial data out respectively. For ATmega128A these
pins are mapped to PDI and PDO.
1. A: Load Command “0000 1000”.
2. B: Load Address Low Byte ($00 - $02).
3. Set OE to “0”, and BS1 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.
3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.
4. Set OE to “1”.
“Parallel Programming Characteristics” on page
Fuse Low Byte
Extended Fuse byte
Fuse high byte
Lock bits
BS2
BS2
0
1
0
1
326.
BS1
Table 26-13 on page
0
1
ATmega128A
DATA
304, the pin
303
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