AT32UC3A0128-ALUT Atmel, AT32UC3A0128-ALUT Datasheet - Page 307
![IC MCU AVR32 128KB FLASH 144LQFP](/photos/6/72/67244/144l1-lqfp_sml.jpg)
AT32UC3A0128-ALUT
Manufacturer Part Number
AT32UC3A0128-ALUT
Description
IC MCU AVR32 128KB FLASH 144LQFP
Manufacturer
Atmel
Series
AVR®32 UC3r
Specifications of AT32UC3A0128-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
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
32K 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
32 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
32KB
Cpu Speed
66MHz
No. Of Timers
1
Rohs Compliant
Yes
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:
AT32UC3A0128-ALUT
Manufacturer:
Atmel
Quantity:
166
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26.7.1.3
Figure 26-4. Fractional Baud Rate Generator
26.7.1.4
32058J–AVR32–04/11
CLK_USART/DIV
CLK
CLK_USART
Reserved
Fractional Baud Rate in Asynchronous Mode
Baud Rate in Synchronous Mode or SPI Mode
USCLKS
1
2
3
0
The Baud Rate generator previously defined is subject to the following limitation: the output fre-
quency changes by only integer multiples of the reference frequency. An approach to this
problem is to integrate a fractional N clock generator that has a high resolution. The generator
architecture is modified to obtain Baud Rate changes by a fraction of the reference source clock.
This fractional part is programmed with the FP field in the Baud Rate Generator Register
(BRGR). If FP is not 0, the fractional part is activated. The resolution is one eighth of the clock
divider. This feature is only available when using USART normal mode. The fractional Baud
Rate is calculated using the following formula:
The modified architecture is presented below:
If the USART is programmed to operate in synchronous mode, the selected clock is simply
divided by the field CD in BRGR.
In synchronous mode, if the external clock is selected (USCLKS = 3), the clock is provided
directly by the signal on the USART CLK pin. No division is active. The value written in BRGR
Baudrate
BaudRate
16-bit Counter
CD
=
---------------------------------------------------------------- - -
⎛
⎝
8 2 Over
Modulus
=
Control
(
FP
SelectedClock
------------------------------------- - -
SelectedClock
–
CD
) CD
⎛
⎝
+
USCLKS = 3
glitch-free
FP
------ -
FP
logic
8
⎞
⎠
⎞
⎠
SYNC
0
CD
>1
0
1
0
1
OVER
Sampling
Divider
FIDI
AT32UC3A
0
1
SYNC
CLK
BaudRate
Sampling
Clock
Clock
307
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