AT32UC3A0256-ALUT Atmel, AT32UC3A0256-ALUT Datasheet - Page 721
![IC MCU AVR32 256KB FLASH 144LQFP](/photos/6/72/67244/144l1-lqfp_sml.jpg)
AT32UC3A0256-ALUT
Manufacturer Part Number
AT32UC3A0256-ALUT
Description
IC MCU AVR32 256KB FLASH 144LQFP
Manufacturer
Atmel
Series
AVR®32 UC3r
Specifications of AT32UC3A0256-ALUT
Core Processor
AVR
Core Size
32-Bit
Speed
66MHz
Connectivity
EBI/EMI, Ethernet, I²C, SPI, SSC, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
109
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
144-LQFP
Processor Series
AT32UC3x
Core
AVR32
Data Bus Width
32 bit
Data Ram Size
64 KB
Interface Type
2-Wire, RS-485, SPI, USART
Maximum Clock Frequency
66 MHz
Number Of Programmable I/os
69
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR32, EWAVR32-BL, KSK-EVK1100-PL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATEXTWIFI, ATEVK1100, ATEVK1105
Minimum Operating Temperature
- 40 C
Controller Family/series
AT32UC3A
No. Of I/o's
109
Ram Memory Size
64KB
Cpu Speed
66MHz
No. Of Timers
1
Rohs Compliant
Yes
Package
144LQFP
Device Core
AVR32
Family Name
AT32
Maximum Speed
66 MHz
Operating Supply Voltage
1.8|3.3 V
For Use With
ATEVK1105 - KIT EVAL FOR AT32UC3A0ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMR770-1008 - ISP 4PORT ATMEL AVR32 MCU SPIATEVK1100 - KIT DEV/EVAL FOR AVR32 AT32UC3A
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:
AT32UC3A0256-ALUT
Manufacturer:
ATMEL
Quantity:
167
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34. Audio Bitstream DAC (ABDAC)
34.1
34.2
32058J–AVR32–04/11
Features
Description
Rev: 1.0.1.1
•
•
•
•
•
The Audio Bitstream DAC converts a 16-bit sample value to a digital bitstream with an average
value proportional to the sample value. Two channels are supported, making the Audio Bit-
stream DAC particularly suitable for stereo audio. Each channel has a pair of complementary
digital outputs, DACn and DACn_N, which can be connected to an external high input imped-
ance amplifier.
The Audio Bitstream DAC is compromised of two 3rd order Sigma Delta D/A converter with an
oversampling ratio of 128. The samples are upsampled with a 4th order Sinc interpolation filter
(Comb4) before being input to the Sigmal Delta Modulator. In order to compensate for the pass
band frequency response of the interpolation filter and flatten the overall frequency response,
the input to the interpolation filter is first filtered with a simple 3-tap FIR filter.The total frequency
response of the Equalization FIR filter and the interpolation filter is given in
733. The digital output bitstreams from the Sigma Delta Modulators should be low-pass filtered
to remove high frequency noise inserted by the Modulation process.
The output DACn and DACn_N should be as ideal as possible before filtering, to achieve the
best SNR quality. The output can be connected to a class D amplifier output stage, or it can be
low pass filtered and connected to a high input impedance amplifier. A simple 1st order or higher
low pass filter that filters all the frequencies above 50 kHz should be adequate.
Digital Stereo DAC
Oversampled D/A conversion architecture
Digital bitstream outputs
Parallel interface
Connected to DMA Controller for background transfer without CPU intervention
– Oversampling ratio fixed 128x
– FIR equalization filter
– Digital interpolation filter: Comb4
– 3rd Order Sigma-Delta D/A converters
AT32UC3A
Figure 34-2 on page
721
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