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PIC18F1220E/SSSQTP Datasheet(PDF) 189 Page - Microchip Technology |
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PIC18F1220E/SSSQTP Datasheet(HTML) 189 Page - Microchip Technology |
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189 / 308 page  © 2007 Microchip Technology Inc. DS39605F-page 187 PIC18F1220/1320 FIGURE 19-7: EXTERNAL BLOCK TABLE READ (EBTRn) DISALLOWED: PIC18F1320 FIGURE 19-8: EXTERNAL BLOCK TABLE READ (EBTRn) ALLOWED: PIC18F1320 000000h 0001FFh 000200h 000FFFh 001000h 001FFFh WRTB, EBTRB = 11 WRT0, EBTR0 = 10 WRT1, EBTR1 = 11 TBLPTR = 0002FFh Register Values Program Memory Configuration Bit Settings PC = 001FFEh TBLRD * Results: All table reads from external blocks to Blockn are disabled whenever EBTRn = 0. TABLAT register returns a value of ‘0’. 000000h 0001FFh 000200h 000FFFh 001000h 001FFFh WRTB, EBTRB = 11 WRT0, EBTR0 = 10 WRT1, EBTR1 = 11 TBLRD * TBLPTR = 0002FFh PC = 0007FEh Register Values Program Memory Configuration Bit Settings Results: Table reads permitted within Blockn, even when EBTRBn = 0. TABLAT register returns the value of the data at the location TBLPTR. |
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