ATMEGA64A-MNR Atmel, ATMEGA64A-MNR Datasheet - Page 307

• Manufacturer Part Number: ATMEGA64A-MNR
• Description: IC MCU AVR 64K FLASH 8QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64A-MNR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K 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: *
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SPI, UART, I2C
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 53
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: ATMEGA64A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27.6.13
27.6.14
27.6.15
8160C–AVR–07/09
Reading the Signature Bytes
Reading the Calibration Byte
Parallel Programming Characteristics
Figure 27-6. 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):
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 “Programming the Flash”
for details on Command and Address loading):
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 27-7. Parallel Programming Timing, Including some General Timing Requirements
(DATA, XA0/1, BS1, BS2)
Data & Contol
RDY/BSY
PAGEL
XTAL1
Fuse Low Byte
Extended Fuse Byte
Lock Bits
Fuse High Byte
WR
t
t
BVPH
DVXH
BS2
BS2
t
t
XHXL
PHPL
t
t
t
t
XLDX
XLWL
PLBX
PLWL
0
1
0
1
t
BVWL
BS1
t
WL WH
WLRL
0
1
t
DATA
WLBX
ATmega64A
t
WLRH
307