ATmega64A Atmel Corporation, ATmega64A Datasheet - Page 323

• Manufacturer Part Number: ATmega64A
• Manufacturer: Atmel Corporation

Specifications of ATmega64A

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

27.9.12
27.9.13
8160C–AVR–07/09
Virtual Flash Page Read Register
Programming Algorithm
Figure 27-16. Virtual Flash Page Load Register
The Virtual Flash Page Read Register is a virtual scan chain with length equal to the number of
bits in one Flash page plus eight. Internally the Shift Register is 8-bit, and the data are automati-
cally transferred from the Flash data page byte-by-byte. The first eight cycles are used to
transfer the first byte to the internal Shift Register, and the bits that are shifted out during these
eight cycles should be ignored. Following this initialization, data are shifted out starting with the
LSB of the first instruction in the page and ending with the MSB of the last instruction in the
page. This provides an efficient way to read one full Flash page to verify programming.
Figure 27-17. Virtual Flash Page Read Register
All references below of type “1a”, “1b”, and so on, refer to
TDO
TDO
TDI
TDI
D
D
A
T
A
A
T
A
Machine
Machine
State
State
STROBES
ADDRESS
STROBES
ADDRESS
Table
EEPROM
EEPROM
Lock Bits
Lock Bits
Fuses
Fuses
Flash
Flash
27-16.
ATmega64A
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