ATMEGA645A-AU Atmel, ATMEGA645A-AU Datasheet - Page 247

• Manufacturer Part Number: ATMEGA645A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8285B–AVR–03/11
ATmega165A/165PA/325A/325PA/3250A/3250PA/6
Figure 24-8. General Boundary-scan cell Used for Signals for Comparator and ADC
Table 24-2.
Signal
Name
AC_IDLE
ACO
ACME
ACBG
From Analog Ciruitry
From Digital Logic/
Direction as
Seen from the
Comparator
input
output
input
input
Boundary-scan Signals for the Analog Comparator
Previous
From
Cell
Description
Turns off Analog
Comparator when
true
Analog Comparator
Output
Uses output signal
from ADC mux when
true
Bandgap Reference
enable
ShiftDR
0
1
ClockDR
D
UpdateDR
Q
Next
Cell
To
D
G
Recommended
Input when Not
in Use
1
Will become input
to µC code being
executed
0
0
Q
EXTEST
0
1
To Analog Circuitry/
To Digital Logic
Output Values when
Recommended Inputs
are Used
Depends upon µC code
being executed
0
Depends upon µC code
being executed
Depends upon µC code
being executed
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