ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 214

• Manufacturer Part Number: ATUC128L4U
• Manufacturer: Atmel Corporation

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

13.6.3.3
13.6.3.4
13.6.3.5
32142A–12/2011
Waking from sleep modes
SleepWalking
Precautions when entering sleep mode
There are two types of wake-up sources from sleep mode, synchronous and asynchronous.
Synchronous wake-up sources are all non-masked interrupts. Asynchronous wake-up sources
are AST, WDT, external interrupts from EIC, external reset, external wake pin (WAKE_N), and
all asynchronous wake-ups enabled in the Asynchronous Wake Up Enable (AWEN) register. The
valid wake-up sources for each sleep mode are detailed in
In Shutdown the only wake-up sources are external reset, external wake-up pin or AST. See
Section 13.6.4.3 on page
Table 13-3.
Notes:
In all sleep modes where the PBx clocks are stopped, except for Shutdown mode, the device
can partially wake up if a PBx module asynchronously discovers that it needs its clock. Only the
requested clocks and clock sources needed will be started, all other clocks will remain masked
to zero. E.g. if the main clock source is OSC0, only OSC0 will be started even if other clock
sources were enabled in normal mode. Generic clocks can also be started in a similar way. The
state where only requested clocks are running is referred to as SleepWalking.
The time spent to start the requested clock is mostly limited by the startup time of the given clock
source. This allows PBx modules to handle incoming requests, while still keeping the power con-
sumption at a minimum.
When the device is SleepWalking any asynchronous wake-up can wake the device up at any
time without stopping the requested PBx clock.
All requests to start clocks can be masked by writing to the Peripheral Power Control Register
(PPCR), all requests are enabled at reset.
During SleepWalking the interrupt controller clock will be running. If an interrupt is pending when
entering SleepWalking, it will wake the whole device up.
Modules communicating with external circuits should normally be disabled before entering a
sleep mode that will stop the module operation. This will prevent erratic behavior caused by
entering or exiting sleep modes. Please refer to the relevant module documentation for recom-
mended actions.
Index
0
1
2
3
4
5
6
(1)
1. The sleep mode index is used as argument for the sleep instruction.
2. Only PB modules operational, as HSB module clocks are stopped.
3. WDT only available if clocked from pre-enabled OSC32K.
Sleep Mode
Idle
Frozen
Standby
Stop
DeepStop
Static
Shutdown
Wake-up Sources
216.
Wake-up Sources
Synchronous, Asynchronous
Synchronous
Asynchronous
Asynchronous
Asynchronous
Asynchronous
External reset, External wake-up pin
(2)
(3)
, Asynchronous
ATUC64/128/256L3/4U
Table 13-3 on page
214.
214