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PIC24F04KA201 Datasheet(PDF) 19 Page - Microchip Technology

Part # PIC24F04KA201
Description  Flash Programming Specifications
PDF  48 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC24F04KA201 Datasheet(HTML) 19 Page - Microchip Technology

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© 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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