QT60168C-ASG-SL683 Atmel, QT60168C-ASG-SL683 Datasheet - Page 26

• Manufacturer Part Number: QT60168C-ASG-SL683
• Description: Interface - Specialized Integrated Circuit
• Manufacturer: Atmel

Specifications of QT60168C-ASG-SL683

• Product Category: Interface - Specialized
• Rohs: yes
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-32
• Minimum Operating Temperature: - 40 C

7 Appendix
7.1 8-Bit CRC Algorithm
// 8 bits crc calculation. Initial value is 0.
// polynomial = X
// data is an 8 bit number;
unsigned char eight_bit_crc(unsigned char crc, unsigned char data)
{ unsigned char index;
}
A CRC calculator for Windows is available free of charge from Quantum Research.
lQ
unsigned char fb;
index = 8;
do
{ fb = (crc ^ data) & 0x01;
} while(--index);
data >>= 1;
crc >>= 1;
If(fb)
{ crc ^= 0x8c;
}
return crc;
8
+ X
5
// initialise the shift counter
+ X
4
+ 1
crc is a 8 bit number
// shift counter
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QT60248-AS R4.02/0405