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HCS301 Datasheet(PDF) 5 Page - Microchip Technology |
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HCS301 Datasheet(HTML) 5 Page - Microchip Technology |
5 / 28 page 2004 Microchip Technology Inc. Preliminary DS41256A-page 5 HCSXXX 2.0 MEMORY MAPPING The program memory maps for KEELOQ products begin at 0x000 and extend as shown in the tables that follow. As a device is being programmed, the address counter automatically increments to the next word location after receiving a data word. The memory maps for all KEELOQ encoders and transponders were designed so that each word is 16 bits wide. Decoder memory maps are 8 bits wide. 2.1 Encoder Memory Maps TABLE 2-1: HCS200 12 X 16-BIT EEPROM MEMORY MAP TABLE 2-2: HCS201 12 X 16-BIT EEPROM MEMORY MAP Word Address Mnemonic Description 0x00 KEY_0 Word 0 (LSb's) of 64-bit crypt key 0x01 KEY_1 Word 1 of 64-bit crypt key 0x02 KEY_2 Word 2 of 64-bit crypt key 0x03 KEY_3 Word 3 (MSb's) of 64-bit crypt key 0x04 SYNC 16-bit synchronization value 0x05 Reserved Set to 0x0000 0x06 SER_0 Word 0 (LSb's) of 32-bit serial number 0x07 SER_1 Word 1 (MSb's) of 32-bit serial number 0x08 SEED_0 Word 0 (LSb's) of 32-bit seed value 0x09 SEED_1 Word 1 (MSb's) of 32-bit seed value 0x0A Reserved Set to 0x0000 0x0B CONFIG Configuration Word Word Address Mnemonic Description 0x00 KEY_0 Word 0 (LSb's) of 64-bit crypt key 0x01 KEY_1 Word 1 of 64-bit crypt key 0x02 KEY_2 Word 2 of 64-bit crypt key 0x03 KEY_3 Word 3 (MSb's) of 64-bit crypt key 0x04 SYNC 16-bit synchronization value 0x05 Reserved Set to 0x0000 0x06 SER_0 Word 0 (LSb's) of 32-bit serial number 0x07 SER_1 Word 1 (MSb's) of 32-bit serial number 0x08 SEED_0 Word 0 (LSb's) of 32-bit seed value 0x09 SEED_1 Word 1 (MSb's) of 32-bit seed value 0x0A DISC Discrimination Word 0x0B CONFIG Configuration Word |
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