AT32UC3A0128AU Atmel Corporation, AT32UC3A0128AU Datasheet - Page 88
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AT32UC3A0128AU
Manufacturer Part Number
AT32UC3A0128AU
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(98 pages)
2.AT32UC3A0128.pdf
(826 pages)
3.AT32UC3A0128.pdf
(377 pages)
4.AT32UC3A0128.pdf
(33 pages)
5.AT32UC3A0128.pdf
(159 pages)
6.AT32UC3A0128AU.pdf
(2 pages)
Specifications of AT32UC3A0128AU
Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
66 MHz
Cpu
32-bit AVR
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
109
Ext Interrupts
109
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device + OTG
Spi
6
Twi (i2c)
1
Uart
4
Ssc
1
Ethernet
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
16
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0-3.6 or (1.65-1.95+3.0-3.6)
Operating Voltage (vcc)
3.0-3.6 or (1.65-1.95+3.0-3.6)
Fpu
No
Mpu / Mmu
Yes / No
Timers
10
Output Compare Channels
16
Input Capture Channels
6
Pwm Channels
13
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT32UC3A0128AU-U
Manufacturer:
ATMEL
Quantity:
4
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32058K AVR32-01/12
14.5.1.2
14.5.1.3
14.5.1.4
14.5.1.5
Counter operation
RTC Interrupt
RTC wakeup
Busy bit
The CLK32 bit selects either the RC oscillator or the 32 KHz oscillator as clock source for the
prescaler.
The PSEL bitfield selects the prescaler tapping, selecting the source clock for the RTC:
When enabled, the RTC will increment until it reaches TOP, and then wrap to 0x0. The status bit
TOPI in ISR is set when this occurs. From 0x0 the counter will count TOP+1 cycles of the source
clock before it wraps back to 0x0.
The RTC count value can be read from or written to the register VAL. Due to synchronization,
continuous reading of the VAL with the lowest prescaler setting will skip every other value.
Writing the TOPI bit in IER enables the RTC interrupt, while writing the corresponding bit in IDR
disables the RTC interrupt. IMR can be read to see whether or not the interrupt is enabled. If
enabled, an interrupt will be generated if the TOPI flag in ISR is set. The flag can be cleared by
writing TOPI in ICR to one.
The RTC interrupt can wake the CPU from all sleep modes except DeepStop and Static mode.
The RTC can also wake up the CPU directly without triggering an interrupt when the TOPI flag in
ISR is set. In this case, the CPU will continue executing from the instruction following the sleep
instruction.
This direct RTC wakeup is enabled by writing the WAKE_EN bit in the CTRL register to one.
When the CPU wakes from sleep, the WAKE_EN bit must be written to zero to clear the internal
wake signal to the sleep controller, otherwise a new sleep instruction will have no effect.
The RTC wakeup is available in all sleep modes except Static mode. The RTC wakeup can be
configured independently of the RTC interrupt.
Due to the crossing of clock domains, the RTC uses a few clock cycles to propagate the values
stored in CTRL, TOP, and VAL to the RTC. The BUSY bit in CTRL indicates that a register write
is still going on and all writes to TOP, CTRL, and VAL will be discarded until BUSY goes low
again.
f
RTC
= 2
-(PSEL+1)
* (f
RC
or 32 KHz)
AT32UC3A
88
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