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PIC24F16KA102 데이터시트(PDF) 26 Page - Microchip Technology

부품명 PIC24F16KA102
상세설명  Flash Programming Specifications
PDF  48 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC24F16KA102 데이터시트(HTML) 26 Page - Microchip Technology

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PIC24FXXKAXXX
DS39919A-page 26
Advance Information
© 2008 Microchip Technology Inc.
4.5.2
PROGRAMMING VERIFICATION
After the code memory is programmed, the contents of
the memory can be verified to ensure that the
programming is successful. Verification requires the
code memory to be read back and compared with the
copy held in the programmer‘s buffer.
The READP command can be used to read back all of
the programmed code memory.
Alternatively, you can have the programmer perform
the verification after the entire device is programmed
using a checksum computation.
FIGURE 4-5:
FLOWCHART FOR
PROGRAMMING CODE
MEMORY
4.6
Data EEPROM Programming
4.6.1
PROGRAMMING METHODOLOGY
The programming executive uses the PROGD command
to program the data EEPROM. Figure 4.7 illustrates
this process.
• First, the number of words to program
(RemainingWords) is based on the device size
and the destination address (DestAddress) is set
to 0. In this example, 256 words of data EEPROM
will be programmed.
• The first PROGD command programs the first word
of data EEPROM.
• Once the command completes successfully,
‘RemainingWords’ is decremented by 1 and
compared with 0.
• Since there are 255 more words to program,
‘BaseAddress’ is incremented by 02h to point to
the next word of data EEPROM.
• This process is then repeated until all 256 words
of data EEPROM are programmed.
4.6.2
PROGRAMMING VERIFICATION
Once the data EEPROM is programmed, the contents
of the memory can be verified to ensure if the
programming was successful. Verification requires the
data EEPROM to be read back and compared with the
copy held in the programmer‘s buffer. The READD
command reads back the programmed data EEPROM.
Alternatively,
the
programmer
can
perform
the
verification once the entire device is programmed using
a
checksum
computation,
as
described
in
Section 6.1.1 “Checksum Computation”.
Is
PROGP
response
PASS?
Are
RemainingCmds
‘0‘?
BaseAddress = 00h
RemainingCmds = 176
RemainingCmds =
RemainingCmds – 1
BaseAddress =
BaseAddress + 40h
No
No
Yes
Yes
Start
Failure
Report Error
Send PROGP
Command to Program
BaseAddress
End



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