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AT43USB326 Datasheet(PDF) 85 Page - ATMEL Corporation |
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AT43USB326 Datasheet(HTML) 85 Page - ATMEL Corporation |
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85 / 102 page  85 AT43USB326 3313D–USB–04/06 Address locations 0x04 through 0x6E store the VID, PID, Release Number and String Descriptors if they are enabled by the mask bits in location 0x03. The data are stored sequen- tially as described below: Initial Check Byte This check byte is located immediately after the last VID, PID or stings. It is computed as the truncated sum of Mask1 and all the string length specified. Keyboard Matrix The keyboard matrix is 144 bytes. If specified, its check byte is located in address 0x6F while the matrix itself is located from address 0x70 - 0xFF. 0x70 = Col 0, Row 0 0x71 = Col 0, Row 1 ....... 0x78 = Col 1, Row 0 0x79 = Col 1, Row 1 ..... 0xF8 = Col 17, Row 0 0xF9 = Col 17, Row 1 ..... 0xFF = Col 17, Row 7 Example of SEEPROM Data Table 26 through Table 34 illustrate the contents of a SEEPROM for a typical AT43USB326- based keyboard. Table 24. VID and PID VID Byte 1 VID Byte 2 PID Byte 1 PID Byte 2 Release # Byte 1 Release # Byte 2 Check Byte Table 25. Language ID and Strings Length (N) Byte 1 Byte 2 Byte N - 1 Check Byte Table 26. Preamble Address Data Description 00 17 Fixed ID 01 5A Fixed ID 02 00 Reserved 03 BF Mask bits |
Similar Part No. - AT43USB326_06 |
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Similar Description - AT43USB326_06 |
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