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PIC24FJ64GA Datasheet(PDF) 41 Page - Microchip Technology |
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PIC24FJ64GA Datasheet(HTML) 41 Page - Microchip Technology |
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41 / 52 page  © 2008 Microchip Technology Inc. DS39768D-page 41 PIC24FJXXXGA0XX 5.3.1.3 QE_Code Field The QE_Code is a byte in the first word of the response. This byte is used to return data for query commands and error codes for all other commands. When the programming executive processes one of the two query commands (QBLANK or QVER), the returned opcode is always PASS and the QE_Code holds the query response data. The format of the QE_Code for both queries is shown in Table 5-3. TABLE 5-3: QE_Code FOR QUERIES When the programming executive processes any command other than a query, the QE_Code represents an error code. Supported error codes are shown in Table 5-4. If a command is successfully processed, the returned QE_Code is set to 0h, which indicates that there was no error in the command processing. If the verify of the programming for the PROGP or PROGC command fails, the QE_Code is set to 1h. For all other programming executive errors, the QE_Code is 2h. TABLE 5-4: QE_Code FOR NON-QUERY COMMANDS 5.3.1.4 Response Length The response length indicates the length of the programming executive’s response in 16-bit words. This field includes the 2 words of the response header. With the exception of the response for the READP command, the length of each response is only 2 words. The response to the READP command uses the packed instruction word format described in Section 5.2.2 “Packed Data Format”. When reading an odd number of program memory words (N odd), the response to the READP command is (3 * (N + 1)/2 + 2) words. When reading an even number of program memory words (N even), the response to the READP command is (3 * N/2 + 2) words. Query QE_Code QBLANK 0Fh = Code memory is NOT blank F0h = Code memory is blank QVER 0xMN, where programming executive software version = M.N (i.e., 32h means software version 3.2) QE_Code Description 0h No error 1h Verify failed 2h Other error |
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