AT32UC3L064-AUT Atmel, AT32UC3L064-AUT Datasheet - Page 534
![MCU AVR32 64KB FLASH 48TQFP](/photos/6/82/68248/313-48-vqfp_sml.jpg)
AT32UC3L064-AUT
Manufacturer Part Number
AT32UC3L064-AUT
Description
MCU AVR32 64KB FLASH 48TQFP
Manufacturer
Atmel
Series
AVR®32 UC3r
Datasheets
1.ATAVRONE-PROBECBL.pdf
(16 pages)
2.AT32UC3L-EK.pdf
(858 pages)
3.AT32UC3L016-D3HT.pdf
(110 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT32UC3L064-AUT
Manufacturer:
HONGFA
Quantity:
30 000
Part Number:
AT32UC3L064-AUT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- Current page: 534 of 858
- Download datasheet (13Mb)
23.6.3
23.6.3.1
32099F–11/2010
Spread Spectrum Counter
Special considerations
zero). When the timebase counter reaches its effective top value, it restarts counting from zero.
The period of the PWMA output waveform is then:
The timebase counter can be reset by writing a one to the Timebase Clear bit in CR (CR.TCLR).
Note that this can cause a glitch to the output PWM waveforms in use.
The spread spectrum counter allows the generation of constantly varying duty cycles on the out-
put PWM waveforms. This is achieved by varying the effective top value of the timebase counter
in a range defined by the spread spectrum counter value.
When CR.SPREAD is not zero, the spread spectrum counter is enabled. Its range is defined by
CR.SPREAD. It starts to count from -CR.SPREAD when the PWMA is enabled or after reset
and counts upwards. When it reaches CR.SPREAD, it restarts to count from -CR.SPREAD
again. The spread spectrum counter will cause the effective top value (ETV) to vary from TOP-
SPREAD to TOP+SPREAD.
varying duty cycle on the PWM output waveforms though the duty cycle values stored are
unchanged.
Figure 23-2. PWMA Adjusting Top Value for Timebase Counter
The maximum value of the timebase counter is 255. If SPREAD is written to a value that will
cause the ETV to exceed this value, the spread spectrum counter’s range will be limited to pre-
vent the timebase counter to exceed its maximum value.
If SPREAD is written to a value causing (TOP-SPREAD) to be below zero, the spread specturm
counter’s range will be limited to prevent the timebase counter to count below zero.
In both cases, the SPREAD value read from the Control Register will be the same value as writ-
ten to the SPREAD field.
0xFF
0x0
Duty Cycle
SPREAD
TOP
-SPREAD
Figure 23-2 on page 534
T
PWMA
=
(
ETV
+
Adjusting top value range
for the timerbase counter
1
) T
illustrates this. This leads to a constantly
⋅
AT32UC3L016/32/64
GCLK
534
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