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The ATR allows the card to specify what polarity to use, the baud rate, programming voltage etc. |
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'F' cards contained a Motorol68HC05SC21 microcontroller core with 6K bytes of ROM, 3K bytes of EEPROM, and 128 bytes of RAM.Because geographical North and Magnetic North differ in location, directions to a satellite must be corrected for magnetic variation.HU Card Also known as a P3 card or 'football' card. |