ATUC128L4U Atmel Corporation, ATUC128L4U Datasheet - Page 323

• Manufacturer Part Number: ATUC128L4U
• Manufacturer: Atmel Corporation

Specifications of ATUC128L4U

• 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 Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• 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

15.3
Figure 15-1. Asynchronous Timer Block Diagram
15.4
15.4.1
15.4.2
32142A–12/2011
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
ATUC64/128/256L3/4U
OVF
WAKE ENABLE
REGISTER
Interrupt
Control
Control
Status
Wake
and
Events
Wake
IRQs
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