SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 822
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SAM3U4E
Manufacturer Part Number
SAM3U4E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U4E
Flash (kbytes)
256 Kbytes
Pin Count
144
Max. Operating Frequency
96 MHz
Cpu
Cortex-M3
# Of Touch Channels
57
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
5
Twi (i2c)
2
Uart
5
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
50
Self Program Memory
YES
External Bus Interface
1
Dram Memory
No
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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SAM3U Series
SAM3U Series
The following flowchart
tiple block transfers with the DMA Controller. Polling or interrupt method can be used to wait for
the end of write according to the contents of the Interrupt Mask Register (HSMCI_IMR).
Figure 37-10. Read Multiple Block and Write Multiple Block
Notes:
1. It is assumed that this command has been correctly sent (see
2. Handle errors reported in HSMCI_SR.
READ_MULTIPLE_BLOCK command (1)
Configure the HDMA channel X
DMAC_SADDRx and DMAC_DADDRx
DMAC_BTSIZE = BlockLength/4
(Figure
Read status register DMAC_EBCISR
Send SET_BLOCKLEN command (1)
Send WRITE_MULTIPLE_BLOCK or
Send SELECT/DESELECT_CARD
Read status register HSMCI_SR
Set the block length
HSMCI_MR |= (BlockLength << 16)
Set the DMAEN bit
HSMCI_DMA |= DMAEN
command (1) to select the card
Send STOP_TRANSMISSION
and Poll Bit FIFOEMPTY
DMAC_CHEN[X] = TRUE
and Poll Bit CBTC[X]
37-10) shows how to manage read multiple block and write mul-
New Buffer ?
XFRDONE = 1
command (1)
RETURN
Poll the bit
No
Yes
(2)
Yes
No
Figure
37-7).
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
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