ATMEGA64A-AN Atmel, ATMEGA64A-AN Datasheet - Page 332

• Manufacturer Part Number: ATMEGA64A-AN
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64A-AN

• 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 28-3. Two-wire Serial Bus Timing
8160C–AVR–07/09
SCL
SDA
2. Required only for f
3. C
4. f
5. This requirement applies to all ATmega64A Two-wire Serial Interface operation. Other devices connected to the Two-wire
6. The actual low period generated by the ATmega64A Two-wire Serial Interface is (1/f
7. The actual low period generated by the ATmega64A Two-wire Serial Interface is (1/f
t
SU;STA
Serial Bus need only obey the general f
6 MHz for the low time requirement to be strictly met at f
ment will not be strictly met for f
communicate at full speed (400 kHz) with other ATmega64A devices, as well as any other device with a proper t
tance margin.
CK
b
= capacitance of one bus line in pF.
= CPU clock frequency
SCL
> 100 kHz.
t
HD;STA
t
t
of
LOW
SCL
> 308 kHz when f
SCL
t
HIGH
requirement.
t
HD;DAT
CK
= 8 MHz. Still, ATmega64A devices connected to the bus may
SCL
t
LOW
= 100 kHz.
t
SU;DAT
SCL
SCL
- 2/f
- 2/f
CK
CK
), thus f
), thus the low time require-
t
SU;STO
ATmega64A
CK
t
r
must be greater than
LOW
t
accep-
BUF
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