ATmega64A Atmel Corporation, ATmega64A Datasheet - Page 296

• 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

27.2
8160C–AVR–07/09
Fuse Bits
Table 27-2.
Note:
The ATmega64A has three fuse bytes.
of all the fuses and how they are mapped into the fuse bytes. Note that the fuses are read as
logical zero, “0”, if they are programmed.
Table 27-3.
Note:
Fuse Low Byte
–
–
–
–
–
–
M103C
WDTON
1
2
3
4
(1)
1. Program the Fuse bits before programming the Lock bits.
2. “1” means unprogrammed, “0” means programmed
1. See
2. See
(2)
Memory Lock Bits
Lock Bit Protection Modes
Extended Fuse Byte
“ATmega103 and ATmega64A Compatibility” on page 4
“WDTCR – Watchdog Timer Control Register” on page 57
1
1
0
0
Bit no
7
6
5
4
3
2
1
0
1
0
0
1
Description
–
–
–
–
–
–
ATmega103 compatibility mode
Watchdog Timer always on
Protection Type
No restrictions for SPM or LPM accessing the Boot Loader
section.
SPM is not allowed to write to the Boot Loader section.
SPM is not allowed to write to the Boot Loader section, and LPM
executing from the Application section is not allowed to read
from the Boot Loader section. If Interrupt Vectors are placed in
the Application section, interrupts are disabled while executing
from the Boot Loader section.
LPM executing from the Application section is not allowed to
read from the Boot Loader section. If Interrupt Vectors are
placed in the Application section, interrupts are disabled while
executing from the Boot Loader section.
Table 27-3
(2)
(Continued)
-
Table 27-5
describe briefly the functionality
for details.
for details.
ATmega64A
Default Value
1
1
1
1
1
1
0 (programmed)
1 (unprogrammed)
296