ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 25
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ATUC128L4U
Manufacturer Part Number
ATUC128L4U
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(159 pages)
3.ATUC128L4U.pdf
(960 pages)
4.ATUC128L4U.pdf
(92 pages)
Specifications of ATUC128L4U
Flash (kbytes)
128 Kbytes
Pin Count
48
Max. Operating Frequency
50 MHz
Cpu
32-bit AVR
# Of Touch Channels
17
Hardware Qtouch Acquisition
Yes
Max I/o Pins
36
Ext Interrupts
36
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
2
Uart
4
Lin
4
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
12
Adc Speed (ksps)
460
Analog Comparators
8
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
16
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.62 to 3.6
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
6
Output Compare Channels
18
Input Capture Channels
12
Pwm Channels
35
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATUC128L4U-U
Manufacturer:
ATMEL
Quantity:
3 006
5. Supply and Startup Considerations
5.1
5.1.1
5.1.2
32142AS–12/2011
Supply Considerations
Power Supplies
Voltage Regulator
The ATUC64/128/256L3/4U has several types of power supply pins:
The ground pins GND are common to VDDCORE, VDDIO, and VDDIN. The ground pin for
VDDANA is GNDANA.
When VDDCORE is not connected to VDDIN, the VDDIN voltage must be higher than 1.98V.
Refer to
For decoupling recommendations for the different power supplies, please refer to the schematic
checklist.
Refer to
The ATUC64/128/256L3/4U embeds a voltage regulator that converts from 3.3 V nominal to
1.8V with a load of up to 60 mA. The regulator supplies the output voltage on VDDCORE. The
regulator may only be used to drive internal circuitry in the device. VDDCORE should be exter-
nally connected to the 1.8V domains. See
Adequate output supply decoupling is mandatory for VDDCORE to reduce ripple and avoid
oscillations. The best way to achieve this is to use two capacitors in parallel between VDDCORE
and GND as close to the device as possible. Please refer to
pling capacitors values and regulator characteristics.
Figure 5-1.
The voltage regulator can be turned off in the shutdown mode to power down the core logic and
keep a small part of the system powered in order to reduce power consumption. To enter this
mode the 3.3V supply mode, with 1.8V regulated I/O lines power supply configuration must be
used.
3.3V
1.8V
• VDDIO: Powers I/O lines. Voltage is 1.8 to 3.3V nominal.
• VDDIN: Powers I/O lines, the USB pins, and the internal regulator. Voltage is 1.8 to 3.3V
• VDDANA: Powers the ADC. Voltage is 1.8V nominal.
• VDDCORE: Powers the core, memories, and peripherals. Voltage is 1.8V nominal.
nominal if USB is not used, and 3.3V nominal when USB is used.
Section 7. on page 34
Section on page 10
Supply Decoupling.
C
IN3
for power supply connections for I/O pins.
for power consumption on the various supply pins.
C
C
OUT2
IN2
Section 5.1.3
C
C
OUT1
IN1
ATUC64/128/256L3/4U
for regulator connection figures.
VDDCORE
VDDIN
Section 7.8 on page 47
Regulator
1.8V
for decou-
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