AT32UC3L-EK Atmel, AT32UC3L-EK Datasheet - Page 247

• Manufacturer Part Number: AT32UC3L-EK
• Description: KIT EVAL AVR32 UC3 MCU
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT32UC3L-EK

• Contents: *
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: UC3L
• Kit Contents: Board
• Features: USB / Battery Powered, Board Controller / Bootloader
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Tool Type: Starter Kit
• Cpu Core: AVR 8
• Data Bus Width: 8 bit
• Processor Series: AT32
• Processor To Be Evaluated: AT32UC3L064
• Interface Type: USB, Capacitive Touch
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.3
Figure 14-1. Asynchronous Timer Block Diagram
14.4
14.4.1
14.4.2
32099F–11/2010
CLK_AST
Block Diagram
Product Dependencies
PB clock
OSC32
RCSYS
GCLK
others
Power Management
Clocks
REGISTER
DIGITAL
TUNER
CSSEL
CLK_AST_PRSC
REGISTER
CONTROL
In order to use this module, other parts of the system must be configured correctly, as described
below.
When the AST is enabled, it will remain clocked as long as its selected clock source is running. It
can also wake the CPU from the currently active sleep mode. Refer to the Power Manager chap-
ter for details on the different sleep modes.
The clock for the AST bus interface (CLK_AST) is generated by the Power Manager. This clock
is turned on by default, and can be enabled and disabled in the Power Manager.
A number of clocks can be selected as source for the internal prescaler clock CLK_AST_PRSC.
The prescaler, counter, and interrupt will function as long as this selected clock source is active.
The selected clock must be enabled in the System Control Interface (SCIF).
The following clock sources are available:
• System RC oscillator (RCSYS). This oscillator is always enabled, except in some sleep
• 32KHz crystal oscillator (OSC32K). This oscillator must be enabled before use.
• Peripheral Bus clock (PB clock). This is the clock of the peripheral bus the AST is connected
modes. Please refer to the Electrical Characteristics chapter for the characteristic frequency
of this oscillator.
to.
REGISTER
INTERVAL
PERIODIC
Interrupts
Periodic
EN
Prescaler
32-bit
PSEL
CLK_AST
CLK_AST_CNT
REGISTER
COUNTER
Interrupts
ALARM
VALUE
Alarm
Counter
32-bit
CLK_AST
OVF
WAKE ENABLE
AT32UC3L016/32/64
REGISTER
Interrupt
Control
Control
Status
Wake
and
Events
Wake
IRQs
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