AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 249

• Manufacturer Part Number: AT32UC3A3128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3128

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 110
• Ext Interrupts: 110
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 16
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 12
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Figure 17-3. Parity Generation for 512/1024/2048/4096 8-bit Words
32072G–11/2011
(page size-3)th byte
(page size-2)th byte
(page size-1)th byte
page size th byte
Page size = 512
Page size = 1024
Page size = 2048
Page size = 4096
1
2
3
4
st
nd
rd
th
byte
byte
byte
byte
To calculate P8’ to PX’ and P8 to PX, apply the algorithm that follows.
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
P1
Page size = 2
P2
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
for i =0 to n
begin
end
P1'
for (j = 0 to page_size_byte)
begin
if(j[i] ==1)
else
end
P[2
P[2
Px = 2048
Px = 4096
Px = 8192
Px = 16384
P4
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
i+3
i+3
P1
]=bit7(+)bit6(+)bit5(+)bit4(+)bit3(+)
]’=bit7(+)bit6(+)bit5(+)bit4(+)bit3(+)
P2'
n
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
P1'
bit2(+)bit1(+)bit0(+)P[2
bit2(+)bit1(+)bit0(+)P[2
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
P1
P2
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
P1'
P4'
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'
P4'=bit7(+)bit6(+)bit5(+)bit4(+)P4'
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
P1
P2'
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
P1'
i+3
i+3
]
]'
P8'
P8'
P8'
P8'
P8
P8
P8
P8
P16'
P16'
P16
P16
P32'
P32
PX’
PX
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