SAM3U2E Atmel Corporation, SAM3U2E Datasheet - Page 821
SAM3U2E
Manufacturer Part Number
SAM3U2E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U2E
Flash (kbytes)
128 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)
36
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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Figure 37-9. Write Functional Flow Diagram
Note:
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
1. It is assumed that this command has been correctly sent (see
2. This field is also accessible in the HSMCI Block Register (HSMCI_BLKR).
Number of words to write = BlockLength/4
Reset theDMAEN bit
HSMCI_DMA &= ~DMAEN
Set the block length (in bytes)
HSMCI_MR |= (BlockLength) <<16) (2)
Set the block count (if necessary)
HSMCI_BLKR |= (BlockCount << 0)
Read status register HSMCI_SR
Number of words to write = 0 ?
Send WRITE_SINGLE_BLOCK
HSMCI_TDR = Data to write
Number of words to write =
Number of words to write -1
No
TXRDY = 0?
command (1)
Poll the bit
No
No
Send SET_BLOCKLEN command (1)
Send SELECT/DESELECT_CARD
command (1) to select the card
Yes
Yes
Write using DMAC
RETURN
Figure
Configure the DMA channel X
DMAC_DADDRx = Data Address to write
DMAC_BTSIZE = BlockLength/4
Set the DMAEN bit
HSMCI_DMA |= DMAEN
Set the block length (in bytes)
HSMCI_BLKR |= (BlockLength << 16)
Yes
37-7).
Read status register HSMCI_SR
Send WRITE_SINGLE_BLOCK
DMAC_CHEN[X] = TRUE
XFRDONE = 0?
command (1)
Poll the bit
RETURN
No
SAM3U Series
SAM3U Series
(2)
Yes
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821
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