AT32UC3L064-AUT Atmel, AT32UC3L064-AUT Datasheet - Page 311

• Manufacturer Part Number: AT32UC3L064-AUT
• Description: MCU AVR32 64KB FLASH 48TQFP
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3L064-AUT

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 3.6 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TQFP, 48-VQFP
• Processor Series: AT32UC3x
• Core: AVR32
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: SPI/TWI/USART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 7
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR32, EWAVR32-BL
• Development Tools By Supplier: AT32UC3L-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 9-ch x 10-bit
• Package: 48TQFP
• Device Core: AVR32
• Family Name: AT32
• Maximum Speed: 50 MHz
• Operating Supply Voltage: 1.8|3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

17. Frequency Meter (FREQM)
17.1
17.2
17.3
Figure 17-1. Frequency Meter Block Diagram
17.4
17.4.1
32099F–11/2010
Features
Overview
Block Diagram
Product Dependencies
Power Management
REFSEL
CLKSEL
Rev: 3.0.1.1
•
•
•
•
The Frequency Meter (FREQM) can be used to accurately measure the frequency of a clock by
comparing it to a known reference clock.
In order to use this module, other parts of the system must be configured correctly, as described
below.
The device can enter a sleep mode while a measurement is ongoing. However, make sure that
neither CLK_MSR nor CLK_REF is stopped in the actual sleep mode. FREQM interrupts can
wake up the device from sleep modes when the measurement is done, but only from sleep
modes where CLK_FREQM is running. Please refer to the Power Manager chapter for details.
Accurately measures a clock frequency
Selectable reference clock
A selectable clock can be measured
Ratio can be measured with 24-bit accuracy
CLK_MSR
CLK_REF
Counter
REFNUM,
Timer
START
START
VALUE
Trigger
AT32UC3L016/32/64
ISR
311