AT32UC3L0256 Atmel Corporation, AT32UC3L0256 Datasheet - Page 157
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AT32UC3L0256
Manufacturer Part Number
AT32UC3L0256
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(159 pages)
3.AT32UC3L0128.pdf
(85 pages)
4.AT32UC3L0128.pdf
(852 pages)
Specifications of AT32UC3L0256
Flash (kbytes)
256 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 Speed
No
Usb Interface
No
Spi
5
Twi (i2c)
2
Uart
4
Lin
4
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
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Manufacturer
Quantity
Price
Part Number:
AT32UC3L0256-D3HR
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT32UC3L0256-H
Manufacturer:
ATMEL
Quantity:
270
Part Number:
AT32UC3L0256-H
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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12.6.4
12.6.4.1
12.6.4.2
32145A–12/2011
Shutdown Sleep Mode
Entering Shutdown sleep mode
Description
Communication between the synchronous clock domains is disturbed when entering and exiting
sleep modes. Bus transactions over clock domains affected by the sleep mode are therefore not
recommended. The system may hang if the bus clocks are stopped during a bus transaction.
The CPU is automatically stopped in a safe state to ensure that all CPU bus operations are com-
plete when the sleep mode goes into effect. Thus, when entering Idle mode, no further action is
necessary.
When entering a sleep mode (except Idle mode), all HSB masters must be stopped before
entering the sleep mode. In order to let potential PBx write operations complete, the user should
let the CPU perform a PBx register read operation before issuing the sleep instruction. This will
stall the CPU until pending PBx operations have completed.
The Shutdown sleep mode requires extra care. Please refer to
The Shutdown sleep mode is available only when the device is used in the “3.3V supply mode,
with 1.8V regulated I/O lines“ configuration (refer to the Power Considerations chapter). In this
configuration, the voltage regulator supplies both VDDCORE and VDDIO power supplies.
When the device enters Shutdown mode, the regulator is turned off and only the following logic
is kept powered by VDDIN:
The table below lists I/O line functionality that remains operational during Shutdown sleep mode.
If no special function is used the I/O line will keep its setting when entering the sleep mode
Table 12-4.
Before entering the Shutdown sleep mode, a few actions are required:
Pin
PA11
PA13
PA20
PA21
PB04
PB05
PB10
RESET_N
– OSC32K using alternate pinout PA13/PA20
– AST core logic (internal counter and alarm detection logic)
– Backup Registers
– I/O lines PA11, PA13, PA20, PA21, PB04, PB05, and PB10
– RESET_N line
– All modules should normally be disabled before entering Shutdown sleep mode (see
Section
I/O Lines Usage During Shutdown Mode
12.6.3.5)
Possible Usage During Shutdown Sleep Mode
WAKE_N signal (active low wake-up)
XIN32_2 (OSC32K using alternate pinout)
XOUT32_2 (OSC32K using alternate pinout)
Reset pin
AT32UC3L0128/256
Section
12.6.4.
157
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