PIC18F2420-I/SOC01 Microchip, PIC18F2420-I/SOC01 Datasheet - Page 79
PIC18F2420-I/SOC01
Manufacturer Part Number
PIC18F2420-I/SOC01
Description
28 pin, 16 kb flash, 3804 ram, 25 i/o...
Manufacturer
Microchip
Datasheet
1.PIC18F2420-ISOC01.pdf
(412 pages)
- Current page: 79 of 412
- Download datasheet (7Mb)
6.3
The TBLRD instruction is used to retrieve data from
program memory and places it into data RAM. Table
reads from program memory are performed one byte at
a time.
FIGURE 6-4:
EXAMPLE 6-1:
© 2008 Microchip Technology Inc.
READ_WORD
Reading the Flash Program
Memory
Instruction Register
MOVLW
MOVWF
MOVLW
MOVWF
MOVLW
MOVWF
TBLRD*+
MOVF
MOVWF
TBLRD*+
MOVFW
MOVF
(IR)
READS FROM FLASH PROGRAM MEMORY
READING A FLASH PROGRAM MEMORY WORD
CODE_ADDR_UPPER
TBLPTRU
CODE_ADDR_HIGH
TBLPTRH
CODE_ADDR_LOW
TBLPTRL
TABLAT, W
WORD_EVEN
TABLAT, W
WORD_ODD
(Even Byte Address)
FETCH
PIC18F2420/2520/4420/4520
Program Memory
; Load TBLPTR with the base
; address of the word
; read into TABLAT and increment
; get data
; read into TABLAT and increment
; get data
(Odd Byte Address)
TBLPTR points to a byte address in program space.
Executing TBLRD places the byte pointed to into
TABLAT. In addition, TBLPTR can be modified
automatically for the next table read operation.
The internal program memory is typically organized by
words. The Least Significant bit of the address selects
between the high and low bytes of the word. Figure 6-4
shows the interface between the internal program
memory and the TABLAT.
TBLPTR = xxxxx1
TBLRD
Read Register
TABLAT
TBLPTR = xxxxx0
DS39631E-page 77
Related parts for PIC18F2420-I/SOC01
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC PIC MCU FLASH 8KX16 28QFN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC MCU FLASH 8KX16 28SOIC
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC MCU FLASH 8KX16 28SOIC
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
IC MCU FLASH 8KX16 28-DIP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC PIC MCU FLASH 8KX16 28QFN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
28 PIN, 16 KB STD FLASH, 3804 RAM, 25 I/O, PB FREE,
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
MODULE PLUG-IN DSPIC30F 80QFP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
MODULE PLUG-IN 18F87J50 FS USB
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
BOARD DAUGHTER USB PICTAIL PLUS
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
MODULE PLUG-IN DSPIC33F 100TQFP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
CARD DAUGHTER AUDIO PICTAIL PLUS
Manufacturer:
Microchip Technology
Datasheet: