ATEVK1104 Atmel, ATEVK1104 Datasheet - Page 62
![KIT DEV/EVAL FOR AVR32 AT32UC3A](/photos/9/20/92035/atevk1104_sml.jpg)
ATEVK1104
Manufacturer Part Number
ATEVK1104
Description
KIT DEV/EVAL FOR AVR32 AT32UC3A
Manufacturer
Atmel
Series
AVR®32r
Type
MCUr
Datasheets
1.ATAVRONE-PROBECBL.pdf
(16 pages)
2.ATEVK1104.pdf
(826 pages)
3.ATEVK1104.pdf
(90 pages)
4.ATEVK1104.pdf
(6 pages)
5.ATEVK1104.pdf
(12 pages)
Specifications of ATEVK1104
Contents
Evaluation Board, Software and Documentation
Processor To Be Evaluated
AT32UC3A3
Data Bus Width
32 bit
Interface Type
USB, SPI, USART
Silicon Manufacturer
Atmel
Core Architecture
AVR
Core Sub-architecture
AVR UC3
Silicon Core Number
AT32UC3A3256
Silicon Family Name
AVR
Kit Contents
Board CD Docs
Rohs Compliant
Yes
For Use With/related Products
AT32UC3A3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATEVK1104
Manufacturer:
Atmel
Quantity:
135
- ATAVRONE-PROBECBL PDF datasheet
- ATEVK1104 PDF datasheet #2
- ATEVK1104 PDF datasheet #3
- ATEVK1104 PDF datasheet #4
- ATEVK1104 PDF datasheet #5
- Current page: 62 of 826
- Download datasheet (20Mb)
13.5.8.1
13.5.8.2
13.5.8.3
32058J–AVR32–04/11
Enabling a generic clock
Disabling a generic clock
Changing clock frequency
Figure 13-5. Generic clock generation
A generic clock is enabled by writing the CEN bit in GCCTRL to 1. Each generic clock can use
either Oscillator 0 or 1 or PLL0 or 1 as source, as selected by the PLLSEL and OSCSEL bits.
The source clock can optionally be divided by writing DIVEN to 1 and the division factor to DIV,
resulting in the output frequency:
The generic clock can be disabled by writing CEN to 0 or entering a sleep mode that disables
the PB clocks. In either case, the generic clock will be switched off on the first falling edge after
the disabling event, to ensure that no glitches occur. If CEN is written to 0, the bit will still read as
1 until the next falling edge occurs, and the clock is actually switched off. When writing CEN to 0,
the other bits in GCCTRL should not be changed until CEN reads as 0, to avoid glitches on the
generic clock.
When the clock is disabled, both the prescaler and output are reset.
When changing generic clock frequency by writing GCCTRL, the clock should be switched off by
the procedure above, before being re-enabled with the new clock source or division setting. This
prevents glitches during the transition.
PLL0 clock
Osc0 clock
Osc1 clock
PLL1 clock
f
GCLK
= f
OSCSEL
SRC
PLLSEL
0
1
/
(2*(DIV+1))
Divider
DIV
DIVEN
0
1
Controller
Sleep
Mask
CEN
AT32UC3A
Generic Clock
62
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