AT32UC3L0128 Atmel Corporation, AT32UC3L0128 Datasheet - Page 190
AT32UC3L0128
Manufacturer Part Number
AT32UC3L0128
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 AT32UC3L0128
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 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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13.5.3.2
13.5.3.3
13.5.4
32145A–12/2011
Digital Frequency Locked Loop (DFLL) Operation
Disabling the PLL
PLL Lock
Factor (PLLDIV) fields must be written with the multiplication and division factors, respectively.
The PLLMUL must always be greater than 1, creating the PLL frequency:
The PLL Options (PLLOPT) field should be configured to proper values according to the PLL
operating frequency. The PLLOPT field can also be configured to divide the output frequency of
the PLL by 2 and Wide-Bandwidth mode, which allows faster startup time and out-of-lock time.
It is not possible to change any of the PLL configuration bits when the PLL is enabled, Any write
to PLLn while the PLL is enabled will be discarded.
After setting up the PLL, the PLL is enabled by writing a one to the PLL Enable (PLLEN) bit in
the PLLn register.
The PLL is disabled by writing a zero to the PLL Enable (PLLEN) bit in the PLLn register. After
disabling the PLL, the PLL configuration fields becomes writable.
The lock signal for each PLL is available as a PLLLOCKn flag in the PCLKSR register. If the lock
for some reason is lost, the PLLLOCKLOSTn flag in PCLKSR register will be set. An interrupt
can be generated on a 0 to 1 transition of these bits.
Rev: 2.1.0.1
The DFLL is controlled by the Digital Frequency Locked Loop Interface (DFLLIF). The DFLL is
disabled by default, but can be enabled to provide a high-frequency source clock for synchro-
nous and generic clocks.
Features:
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.
• Internal oscillator with no external components
• 20-150MHz 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 32KHz
mode
clock
f
f
vco
vco
= (PLLMUL+1)/PLLDIV • f
= 2•(PLLMUL+1) • f
REF
, if PLLDIV = 0
REF
, if PLLDIV >0
AT32UC3L0128/256
190
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