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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PIC24F16KA102 데이터시트(PDF) 39 Page - Microchip Technology |
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PIC24F16KA102 데이터시트(HTML) 39 Page - Microchip Technology |
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39 / 48 page  PIC24FXXKAXXX © 2008 Microchip Technology Inc. Advance Information DS39919A-page 39 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 of the 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. Table 5-3 provides the format of the QE_Code for both queries. 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. Table 5-4 provides the supported error codes. 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 two words of the response header. With the exception of the response for the READP command, the length of each response is only two 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. 5.4 Programming the Programming Executive to Memory This section describes the programming of the programming executive to memory and also provides the procedure to perform this. 5.4.1 OVERVIEW If it is determined that the programming executive is not present in the executive memory (as described in Section 4.2 “Confirming the Presence of the Programming Executive”), it must be programmed into the executive memory using ICSP, as described in Section 3.0 “Device Programming – ICSP”. Storing the programming executive to executive memory is the same as normal programming of code memory: The executive memory should be erased and then the programming executive must be programmed 32 words at a time. Erasing the last eight words causes the device diagnostic data in the Diagnostic Words at addresses 8007F0h to 8007FEh to be erased. In order to retain these, the memory locations should be read and stored, and then be reprogrammed in the last eight words of program memory. Table 5-5 provides this control flow. 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 stands for version 3.2 of the programming executive software) QE_Code Description 0h No error. 1h Verify failed. 2h Other error. |
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