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PIC24F16KA102 데이터시트(PDF) 19 Page - Microchip Technology |
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PIC24F16KA102 데이터시트(HTML) 19 Page - Microchip Technology |
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19 / 48 page ![]() PIC24FXXKAXXX © 2008 Microchip Technology Inc. Advance Information DS39919A-page 19 3.10 Reading Data EEPROM Memory The procedure for reading data EEPROM memory is the same as reading the code memory. The only differ- ence is that the 16-bit data words are read instead of the 24-bit words. Table 3-10 provides the ICSP programming details for reading data memory. TABLE 3-10: SERIAL INSTRUCTION EXECUTION FOR READING DATA EEPROM MEMORY Note: The TBLPAG register is hard-coded to 0x7F (the upper byte address of all locations of data memory). Command (Binary) Data (Hex) Description Step 1: Exit Reset vector. 0000 0000 0000 000000 040200 000000 NOP GOTO 0x200 NOP Step 2: Initialize TBLPAG and the Read Pointer (W6) for TBLRD instruction. 0000 0000 0000 2007F0 880190 2FExx6h MOV #0x7F, W0 MOV W0, TBLPAG MOV #<SourceAddress15:0>, W6;(FExx) Step 3: Initialize the Write Pointer (W7) to point to the VISI register. 0000 0000 207847 000000 MOV #VISI, W7 NOP Step 4: Read and clock out the contents of the next location of data EEPROM memory through the VISI register using the REGOUT command. 0000 0000 0000 0001 0000 BA1B96 000000 000000 <VISI> 000000 TBLRDL [W6++], [W7] NOP NOP Clock out contents of VISI register. NOP Step 5: Repeat Step 4 until the required data EEPROM memory is read. Step 6: Reset device internal PC. 0000 0000 040200 000000 GOTO 0x200 NOP |
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