Section 4. Program Memory - Microchip Taiwan

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dsPIC33E/PIC24E Family Reference Manual4.4.4 Program Memory High Word AccessThe TBLRDH and TBLWTH instructions are used to access the upper 8 bits of the programmemory data. Figure 4-6 illustrates how these instructions also support Word or Byte Accessmodes for orthogonality, but the high byte of the program memory data will always return ‘0’.Figure 4-6:Program Data Table Access (Upper 8 bits)TBLRDH.WPC Address2316800x000100000000000x000102000000000x000104000000000x00010600000000TBLRDH.B (Wn = 0)Program Memory‘Phantom’ Byte(Read as ‘0’)TBLRDH.B (Wn = 1)DS70613B-page 4-8© 2010 Microchip Technology Inc.
Section 4. Program MemoryFigure 4-7:Table Memory MapInstruction Executed =TBLRDL, TBLRDH, TBLWTL or TBLWTH(Table Access Enabled)TBLRDH orTBLWTH(MS-ByteAccess Enabled)TBLRDL orTBLWTL(LS-WordAccess Enabled)24-bitProgram Space Address[TBLPAG:Wn]0x000000TABLE PAGE0x00TABLE PAGE0x000x010000TABLE PAGE0x01TABLE PAGE0x010x020000TABLE PAGE0x02TABLE PAGE0x024TABLE PAGE0xFDTABLE PAGE0xFETABLE PAGE0xFDTABLE PAGE0xFE0xFD00000xFE0000Program Memory0xFF0000TABLE PAGE0xFFTABLE PAGE0xFF0xFFFFFE© 2010 Microchip Technology Inc. DS70613B-page 4-9
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Section 4. Program Memory - Microchip Taiwan

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