AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 381

• Manufacturer Part Number: AT91SAM9G45-CU-999
• Description: IC MCU ARM9 APMC 324TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9G45-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 400MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: ROM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 1.1 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 324-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Figure 28-2. Parity Generation for 512/1024/2048/4096 8-bit Words
6438F–ATARM–21-Jun-10
(page size -1 )th byte
(page size -2 )th byte
(page size -3 )th byte
Page size th byte
Page size = 512 Px = 2048
Page size = 1024 Px = 4096
Page size = 2048 Px = 8192
Page size = 4096 Px = 16384
4 th byte
2nd byte
3rd byte
1st byte
ECC Status Registers, ECC Parity Registers are cleared when a read/write command is
detected or a software reset is performed.
For Single-bit Error Correction and Double-bit Error Detection (SEC-DED) hsiao code is used.
24-bit ECC is generated in order to perform one bit correction per 256 or 512 bytes for pages of
512/2048/4096 8-bit words. 32-bit ECC is generated in order to perform one bit correction per
512/1024/2048/4096 8- or 16-bit words.They are generated according to the schemes shown in
Figure 28-2
To calculate P8’ to PX’ and P8 to PX, apply the algorithm that follows.
Bit7
Bit7
Bit7
Bit7
Bit7
Bit7
Bit7
P1
P2
Page size = 2
Bit6
Bit6
Bit6
Bit6
Bit6
Bit6
Bit6
Bit6
P1'
for i =0 to n
begin
end
for (j = 0 to page_size_byte)
begin
if(j[i] ==1)
else
end
P4
P[2
P[2
and
Bit5
Bit5
Bit5
Bit5
Bit5
Bit5
Bit5
Bit5
P1
i+3
i+3
Figure
P2'
]=bit7(+)bit6(+)bit5(+)bit4(+)bit3(+)
]’=bit7(+)bit6(+)bit5(+)bit4(+)bit3(+)
Bit4
Bit4
Bit4
Bit4
Bit4
Bit4
Bit4
Bit4
n
P1'
bit2(+)bit1(+)bit0(+)P[2
28-3.
bit2(+)bit1(+)bit0(+)P[2
Bit3
Bit3
Bit3
Bit3
Bit3
Bit3
Bit3
Bit3
P1
P2
P1=bit7(+)bit5(+)bit3(+)bit1(+)P1
P2=bit7(+)bit6(+)bit3(+)bit2(+)P2
P4=bit7(+)bit6(+)bit5(+)bit4(+)P4
P1'=bit6(+)bit4(+)bit2(+)bit0(+)P1'
P2' bit5( )bit4( )bit1( )bit0( )P2'
Bit2
Bit2
Bit2
Bit2
Bit2
Bit2
Bit2
Bit2
P1'
P4'
Bit1
Bit1
Bit1
Bit1
Bit1
Bit1
Bit1
Bit1
P1
P2'
Bit0
Bit0
Bit0
Bit0
Bit0
Bit0
Bit0
Bit0
P1'
i+3
P8'
P8
P8'
P8
P8'
P8
P8'
i+3
]
]'
P16'
P16'
P16
P16
P32
P32
P32
AT91SAM9G45
PX
PX'
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