ATMEGA64A-AU Atmel, ATMEGA64A-AU Datasheet - Page 266
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ATMEGA64A-AU
Manufacturer Part Number
ATMEGA64A-AU
Description
MCU AVR 64K ISP FLASH 64-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets
1.ATMEGA64A-MUR.pdf
(21 pages)
2.ATMEGA64A-AU.pdf
(392 pages)
3.ATMEGA64A-AU.pdf
(3 pages)
Specifications of ATMEGA64A-AU
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
64-TQFP, 64-VQFP
Package
64TQFP
Device Core
AVR
Family Name
ATmega
Maximum Speed
16 MHz
Operating Supply Voltage
3.3|5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
53
Interface Type
SPI/USART
On-chip Adc
8-chx10-bit
Number Of Timers
4
Processor Series
ATMEGA64x
Core
AVR8
Data Ram Size
4 KB
Maximum Clock Frequency
16 MHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
Cpu Family
ATmega
Device Core Size
8b
Frequency (max)
16MHz
Total Internal Ram Size
4KB
# I/os (max)
53
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
64
Package Type
TQFP
For Use With
770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA64A-AU
Manufacturer:
ATMEL
Quantity:
4 500
Company:
Part Number:
ATMEGA64A-AU
Manufacturer:
Atmel
Quantity:
900
Company:
Part Number:
ATMEGA64A-AU
Manufacturer:
ATMEL85
Quantity:
900
Part Number:
ATMEGA64A-AU
Manufacturer:
AT
Quantity:
20 000
25.5.4
8160C–AVR–07/09
Scanning the Clock Pins
The AVR devices have many clock options selectable by fuses. These are: Internal RC Oscilla-
tor, External RC, External Clock, (High Frequency) Crystal Oscillator, Low-frequency Crystal
Oscillator, and Ceramic Resonator.
Figure 25-7
The Enable signal is supported with a general boundary-scan cell, while the Oscillator/clock out-
put is attached to an observe-only cell. In addition to the main clock, the timer Oscillator is
scanned in the same way. The output from the internal RC Oscillator is not scanned, as this
Oscillator does not have external connections.
Figure 25-7. Boundary-scan Cells for Oscillators and Clock Options
Table 25-3
XTAL1/XTAL2 connections as well as 32 kHz Timer Oscillator.
Table 25-3.
Note:
Enable Signal
EXTCLKEN
OSCON
RCOSCEN
OSC32EN
TOSKON
Previous
1. Do not enable more than one clock source as main clock at a time.
2. Scanning an Oscillator output gives unpredictable results as there is a frequency drift between
3. The clock configuration is programmed by fuses. As a fuse does not change run-time, the
From
Cell
the internal Oscillator and the JTAG TCK clock. If possible, scanning an external clock is
preferred.
clock configuration is considered fixed for a given application. The user is advised to scan the
ShiftDR
shows how each Oscillator with external connection is supported in the scan chain.
summaries the scan registers for the external clock pin XTAL1, oscillators with
0
1
Scan Signals for the Oscillators
ClockDR
Scanned Clock Line
EXTCLK (XTAL1)
OSCCK
RCCK
OSC32CK
TOSCK
D
UpdateDR
Q
Next
Cell
To
D
G
Q
EXTEST
0
1
Clock Option
External Clock
External Crystal
External Ceramic Resonator
External RC
Low Freq. External Crystal
32 kHz Timer Oscillator
XTAL1/TOSC1
ENABLE
(1)(2)(3)
Oscillator
XTAL2/TOSC2
OUTPUT
Previous
From
Cell
ShiftDR
0
1
ATmega64A
ClockDR
Scanned Clock Line
when Not Used
D
FF1
Q
0
0
0
1
0
Next
Cell
To
266