AT32UC3L064 Atmel Corporation, AT32UC3L064 Datasheet - Page 188
AT32UC3L064
Manufacturer Part Number
AT32UC3L064
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(159 pages)
3.AT32UC3L016.pdf
(843 pages)
4.AT32UC3L016.pdf
(110 pages)
Specifications of AT32UC3L064
Flash (kbytes)
64 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
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- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- AT32UC3L016 PDF datasheet #3
- AT32UC3L016 PDF datasheet #4
- Current page: 188 of 843
- Download datasheet (13Mb)
13.5.3.1
13.5.3.2
32099G–06/2011
Enabling the DFLL
Internal synchronization
The DFLL can operate in both open loop mode and closed-loop mode. In closed-loop mode a
low frequency clock with high accuracy can be used as reference clock to get high accuracy on
the output clock (CLK_DFLL).
To prevent unexpected writes due to software bugs, write access to the configuration registers is
protected by a locking mechanism. For details please refer to the UNLOCK register description.
Figure 13-1. DFLLIF Block Diagram
The DFLL is enabled by writing a one to the Enable bit (EN) in the DFLLn Configuration Register
(DFLLnCONF). No other bits or fields in DFLLnCONF must be changed simultaneously, or
before the DFLL is enabled.
Due to multiple clock domains in the DFLLIF, values in the DFLLIF configuration registers need
to be synchronized to other clock domains. The status of this synchronization can be read from
the Power and Clocks Status Register (PCLKSR). Before writing to a DFLLIF configuration reg-
ister, the user must check that the DFLLn Synchronization Ready bit (DFLLnRDY) in PCLKSR is
set. When this bit is set, the DFLL can be configured, and CLK_DFLL is ready to be used. Any
write to a DFLLIF configuration register while DFLLnRDY is cleared will be ignored.
• Internal oscillator with no external components
• 40-150 MHz frequency in closed-loop mode
• Can operate standalone as a high-frequency programmable oscillator in open loop mode
• Can operate as an accurate frequency multiplier against a known frequency in closed-loop
• Optional spread-spectrum clock generation
• Very high-frequency multiplication supported - can generate all frequencies from a 32 KHz
mode
clock
8+9
32
CSIZE
FSIZE
FMUL
IMUL
DFLLLOCKLOSTC
DFLLLOCKC
FREQUENCY
DFLLLOCKLOSTF
TUNER
DFLLLOCKF
COARSE
FINE
DFLLLOCKLOSTA
DFLLLOCKA
8
9
DFLL
AT32UC3L016/32/64
CLK_DFLLIF_DITHER
CLK_DFLLIF_REF
188
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