AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 340

• Manufacturer Part Number: AT32UC3A3128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3128

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 110
• Ext Interrupts: 110
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 16
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 12
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

19.10.1.5
32072G–11/2011
Multi-block Transfer with Source Address Auto-reloaded and Contiguous Destination Address (Row 3)
1. Read the Channel Enable register to choose a free (disabled) channel.
2. Clear any pending interrupts on the channel from the previous DMA transfer by writing
3. Program the following channel registers:
4. After the DMACA channel has been programmed, enable the channel by writing a ‘1’ to
5. Source and destination request single and burst DMACA transactions to transfer the
6. When the block transfer has completed, the DMACA reloads the SARx register. The
a ‘1’ to the Interrupt Clear registers: ClearTfr, ClearBlock, ClearSrcTran, ClearDstTran,
ClearErr. Reading the Interrupt Raw Status and Interrupt Status registers confirms that
all interrupts have been cleared.
a. Write the starting source address in the SARx register for channel x.
b. Write the starting destination address in the DARx register for channel x.
c. Program CTLx and CFGx according to Row 3 as shown in
d. Write the control information for the DMA transfer in the CTLx register for channel
– i. Set up the transfer type (memory or non-memory peripheral for source and
– ii. Set up the transfer characteristics, such as:
e. Write the channel configuration information into the CFGx register for channel x.
– i. Designate the handshaking interface type (hardware or software) for the source
– ii. If the hardware handshaking interface is activated for the source or destination
the ChEnReg.CH_EN bit. Make sure that bit 0 of the DmaCfgReg register is enabled.
block of data (assuming non-memory peripherals). The DMACA acknowledges at the
completion of every transaction (burst and single) in the block and carries out the block
transfer.
DARx register remains unchanged. Hardware sets the block complete interrupt. The
DMACA then samples the row number as shown in
DMACA is in Row 1, then the DMA transfer has completed. Hardware sets the transfer
complete interrupt and disables the channel. So you can either respond to the Block
destination) and flow control device by programming the TT_FC of the CTLx
register.
and destination peripherals. This is not required for memory. This step requires
programming the HS_SEL_SRC/HS_SEL_DST bits, respectively. Writing a ‘0’
activates the hardware handshaking interface to handle source/destination requests
for the specific channel. Writing a ‘1’ activates the software handshaking interface to
handle source/destination requests.
peripheral, assign handshaking interface to the source and destination peripheral.
This requires programming the SRC_PER and DEST_PER bits, respectively.
– Transfer width for the source in the SRC_TR_WIDTH field.
– Transfer width for the destination in the DST_TR_WIDTH field.
– Source master layer in the SMS field where source resides.
– Destination master layer in the DMS field where destination resides.
– Incrementing/decrementing or fixed address for source in SINC field.
– Incrementing/decrementing or fixed address for destination in DINC field.
Program the LLPx register with ‘0’.
x. For example, in this register, you can program the following:
Table 19-1 on page
Table 19-1 on page
326. If the
326.
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