SAM9G25 Atmel Corporation, SAM9G25 Datasheet - Page 344

• Manufacturer Part Number: SAM9G25
• Manufacturer: Atmel Corporation

Specifications of SAM9G25

• Flash (kbytes): 0 Kbytes
• Pin Count: 247
• Max. Operating Frequency: 400 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 105
• Ext Interrupts: 105
• Usb Transceiver: 3
• Usb Speed: Hi-Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 3
• Uart: 7
• Lin: 4
• Ssc: 1
• Ethernet: 1
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: Yes
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 440
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: DDR2/LPDDR, SDRAM/LPSDR
• 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
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

Figure 27-2. Software Hardware Multibit Error Correction Dataflow
344
Configure PMECC :
error correction capability
sector size/page size
NAND write field set to true
spare area desired layout
Move the NAND Page
to external Memory
whether using DMA or
Processor
Copy redundancy from
PMECC user interface
to user defined spare area.
using DMA or Processor.
SAM9G25
Software
NAND Flash
READ PAGE
Operation
PMECC computes
redundancy as the
data is written into
external memory
Hardware
Accelerator
Configure PMECC :
error correction capability
sector size/page size
NAND write field set to false
spare area desired layout
When the table of
syndromes is completed,
use the get_sigma()
function to get the
error location polynomial.
Move the NAND Page
from external Memory
whether using DMA or
Processor
If a sector is corrupted
use the substitute()
function to determine
the syndromes.
Find the error positions
finding the roots of the
error location polynomial.
And correct the bits.
Software
NAND Flash
PROGRAM PAGE
Operation
PMECC computes
polynomial remainders
as the data is read
from external memory
PMECC modules
indicate if at least one
error is detected.
This step can
be hardware assisted
using the PMERRLOC
module.
Hardware
Accelerator
11032A–ATARM–27-Jul-11