AT90CAN64-16MU Atmel, AT90CAN64-16MU Datasheet - Page 37

• Manufacturer Part Number: AT90CAN64-16MU
• Description: IC MCU AVR 64K FLASH 64-QFN
• Manufacturer: Atmel
• Series: AVR® 90CANr

Specifications of AT90CAN64-16MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: CAN, EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (64K x 8)
• 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-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• Processor Series: AT90CANx
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: 2-Wire, SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 2
• Operating Supply Voltage: 0.5 V to 0.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATDVK90CAN1, ATADAPCAN01
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATDVK90CAN1 - KIT DEV FOR AT90CAN128 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5. System Clock
5.1
5.1.1
5.1.2
5.1.3
7679H–CAN–08/08
Clock Systems and their Distribution
CPU Clock – clk
I/O Clock – clk
Flash Clock – clk
I/O
Figure 5-1
need not be active at a given time. In order to reduce power consumption, the clocks to unused
modules can be halted by using different sleep modes, as described in
Sleep Modes” on page
Figure 5-1.
The CPU clock is routed to parts of the system concerned with operation of the AVR core.
Examples of such modules are the General Purpose Register File, the Status Register and the
data memory holding the Stack Pointer. Halting the CPU clock inhibits the core from performing
general operations and calculations.
The I/O clock is used by the majority of the I/O modules, like Timer/Counters, SPI, CAN,
USART. The I/O clock is also used by the External Interrupt module, but note that some external
interrupts are detected by asynchronous logic, allowing such interrupts to be detected even if the
I/O clock is halted. Also note that address recognition in the TWI module is carried out asynchro-
nously when clk
The Flash clock controls operation of the Flash interface. The Flash clock is usually active simul-
taneously with the CPU clock.
CPU
FLASH
CLKO
presents the principal clock systems in the AVR and their distribution. All of the clocks
Timer/Counter2
External Clock
Timer/Counter2
Asynchronous
Clock Distribution
I/O
CKOUT Fuse
is halted, enabling TWI address reception in all sleep modes.
Multiplexer
46. The clock systems are detailed below.
TOSC1
Timer/Counter2
Controller
Oscillator
CAN
TOSC2
General I/O
Modules
clk
External Clock
clk
ASY
I/O
Multiplexer
Prescaler
Control Unit
AVR Clock
Clock
ADC
clk
XTAL1
ADC
Oscillator
Crystal
AT90CAN32/64/128
Source clock
XTAL2
CPU Core
clk
clk
Reset Logic
CPU
FLASH
Watchdog clock
“Power Management and
Crystal Oscillator
Low-frequency
Watchdog Timer
RAM
Watchdog
Oscillator
Calibrated RC
Flash and
EEPROM
Oscillator
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