ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 216
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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
- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- ATUC128L4U PDF datasheet #3
- ATUC128L4U PDF datasheet #4
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- Download datasheet (15Mb)
13.6.4.3
13.6.4.4
13.6.5
32142A–12/2011
Divided PB Clocks
Leaving Shutdown sleep mode
Special consideration regarding waking up from Shutdown sleep mode using the WAKE_N pin
As soon as the Shutdown sleep mode is entered, all CPU and peripherals are reset to ensure a
consistent state. POR33 and RC32K are automatically disabled to save extra power.
Exiting Shutdown sleep mode can be done by the events described in
Table 13-5.
When a wake-up event occurs, the regulator is turned on and the device will wait for VDDCORE
to be valid before starting. The Sleep Reset bit in the Reset Cause register (RCAUSE.SLEEP) is
then set, allowing software running on the device to distinguish between the first power-up and a
wake-up from Shutdown mode.
By default, the WAKE_N pin will only wake the device up if it is pulled low after entering Shut-
down mode. If the WAKE_N is pulled low before the Shutdown mode is entered, it will not wake
the device from the Shutdown sleep mode. In order to wake the device by pulling WAKE_N low
before entering Shutdown mode, the user has to write a one to the bit corresponding to the
WAKEN wake-up source in the AWEN register. In this scenario, the CPU execution will proceed
with the next instruction, and the RCAUSE register content will not be altered.
The clock generator in the Power Manager provides divided PBx clocks for use by peripherals
that require a prescaled PBx clock. This is described in the documentation for the relevant mod-
ules. The divided clocks are directly maskable, and are stopped in sleep modes where the PBx
clocks are stopped.
Source
PA11 (WAKE_N)
RESET_N
AST
– The POR33 must be masked to avoid spurious resets when the power is back. This
– The 32KHz RC oscillator (RC32K) must be running and stable. This is done by
must also be done when POR33 is disabled, as POR33 will be enabled
automatically when the device wakes up from Shutdown mode. Disable the POR33
by writing a one to the POR33MASK bit in the SCIF.VREGCR register. Due to
internal synchronisation, this bit must be read as a one before the sleep instruction is
executed by the CPU. Refer to the System Control Interface (SCIF) chapter for more
details.
writing a one to the EN bit in the SCIF.RC32KCR register. Due to internal
synchronisation, this bit must be read as a one to ensure that the oscillator is stable
before the sleep instruction is executed by the CPU.
Events That Can Wake up the Device from Shutdown Mode
Pulling-down RESET_N pin will wake up the device
The device is kept under reset until RESET_N is tied high
again
OSC32K must be set-up to use alternate pinout (XIN32_2
and XOUT32_2) Refer to the SCIF Chapter
AST must be configured to use the clock from OSC32K
AST must be configured to allow alarm, periodic, or
overflow wake-up
How
Pulling-down PA11 will wake up the device
ATUC64/128/256L3/4U
Table
13-5.
216
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