PIC18F258-ESLASHLSQTP datasheet(280/402 Pages) MICROCHIP

Part #	PIC18F258-E/LSQTP

Description	28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PDF	402 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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280 / 402 page

PIC18FXX8

DS41159E-page 278

FIGURE 24-5:

EXTERNAL BLOCK TABLE READ (EBTRn) DISALLOWED

FIGURE 24-6:

EXTERNAL BLOCK TABLE READ (EBTRn) ALLOWED

000000h

0001FFh

000200h

001FFFh

002000h

003FFFh

004000h

005FFFh

006000h

007FFFh

WRTB, EBTRB = 11

WRT0, EBTR0 = 10

WRT1, EBTR1 = 11

WRT2, EBTR2 = 11

WRT3, EBTR3 = 11

TBLRD *

TBLPTR = 000FFF

PC = 002FFE

Results: All table reads from external blocks to Blockn are disabled whenever EBTRn = 0.

TABLAT register returns a value of ‘0’.

Program Memory

Configuration Bit Settings

000000h

0001FFh

000200h

001FFFh

002000h

003FFFh

004000h

005FFFh

006000h

007FFFh

WRTB, EBTRB = 11

WRT0, EBTR0 = 10

WRT1, EBTR1 = 11

WRT2, EBTR2 = 11

WRT3, EBTR3 = 11

TBLRD *

TBLPTR = 000FFF

PC = 001FFE

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.

PIC18F258-E/LSQTP Datasheet(PDF) 280 Page - Microchip Technology

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