SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 602

• Manufacturer Part Number: SAM9G20
• Manufacturer: Atmel Corporation

Specifications of SAM9G20

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 7
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 95
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 0.9 to 1.1
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

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AT91SAM9G20
The following flowchart shows how to manage a multiple write block transfer with the PDC (see
Figure
the contents of the Interrupt Mask Register (MCI_IMR).
Figure 35-12. Multiple Write Functional Flow Diagram
Notes:
35-12). Polling or interrupt method can be used to wait for the end of write according to
1. It is assumed that this command has been correctly sent (see
2. This field is also accessible in the MCI Block Register (MCI_BLKR).
Configure the PDC channel
MCI_TPR = Data Buffer Address to write
MCI_TCR = BlockLength/4
Send SET_BLOCKLEN command
Send SELECT/DESELECT_CARD
Set the PDCMODE bit
MCI_MR |= PDCMODE
Set the block length (in bytes)
MCI_MR |= (BlockLength << 16) (2)
Set the block count (if necessary)
MCI_BLKR |= (BlockCount << 0)
Send WRITE_MULTIPLE_BLOCK
command (1) to select the card
Send STOP_TRANSMISSION
Read status register MCI_SR
MCI_PTCR = TXTEN
NOTBUSY = 0?
command
command
BLKE = 0?
Poll the bit
RETURN
Poll the bit
No
No
(1)
(1)
(1)
Yes
Yes
Figure
35-9).
6384E–ATARM–05-Feb-10