SAM9G20 Atmel Corporation, SAM9G20 Datasheet - Page 635
SAM9G20
Manufacturer Part Number
SAM9G20
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G20.pdf
(42 pages)
5.SAM9G20.pdf
(832 pages)
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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34.11 HSMCI Boot Operation Mode
34.11.1
34.11.2
34.12 HSMCI Transfer Done Timings
34.12.1
34.12.2
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
In boot operation mode, the processor can read boot data from the slave (MMC device) by keeping the CMD line
low after power-on before issuing CMD1. The data can be read from either the boot area or user area,
depending on register setting. Boot Procedure, Processor Mode
Boot Procedure DMA Mode
Definition
Read Access
The XFRDONE flag in the HSMCI_SR indicates exactly when the read or write sequence is
finished.
During a read access, the XFRDONE flag behaves as shown in
1. Configure the HSMCI data bus width programming SDCBUS Field in the
2. Set the byte count to 512 bytes and the block count to the desired number of blocks,
3. Issue the Boot Operation Request command by writing to the HSMCI_CMDR register
4. The BOOT_ACK field located in the HSMCI_CMDR register must be set to one, if the
5. Host processor can copy boot data sequentially as soon as the RXRDY flag is
6. When Data transfer is completed, host processor shall terminate the boot stream by
1. Configure the HSMCI data bus width by programming SDCBUS Field in the
2. Set the byte count to 512 bytes and the block count to the desired number of blocks by
3. Enable DMA transfer in the HSMCI_DMA register.
4. Configure DMA controller, program the total amount of data to be transferred and
5. Issue the Boot Operation Request command by writing to the HSMCI_CMDR register
6. DMA controller copies the boot partition to the memory.
7. When DMA transfer is completed, host processor shall terminate the boot stream by
HSMCI_SDCR register. The BOOT_BUS_WIDTH field located in the device Extended
CSD register must be set accordingly.
writing BLKLEN and BCNT fields of the HSMCI_BLKR Register.
with SPCMD field set to BOOTREQ, TRDIR set to READ and TRCMD set to “start data
transfer”.
BOOT_ACK field of the MMC device located in the Extended CSD register is set to one.
asserted.
writing the HSMCI_CMDR register with SPCMD field set to BOOTEND.
HSMCI_SDCR register. The BOOT_BUS_WIDTH field in the device Extended CSD
register must be set accordingly.
writing BLKLEN and BCNT fields of the HSMCI_BLKR Register.
enable the relevant channel.
with SPCND set to BOOTREQ, TRDIR set to READ and TRCMD set to “start data
transfer”.
writing the HSMCI_CMDR register with SPCMD field set to BOOTEND.
Figure
34-11.
SAM9G35
SAM9G35
635
635
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