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PIC24F16KA102 데이터시트(PDF) 27 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) 27 Page - Microchip Technology

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PIC24FXXKAXXX
© 2008 Microchip Technology Inc.
Advance Information
DS39919A-page 27
FIGURE 4-6:
FLOWCHART FOR
PROGRAMMING DATA
EEPROM
4.7
Configuration Bits Programming
The PIC24FXXKAXXX family has eight Configuration
registers
. The bits of these registers can be set or
cleared to select various device configurations. There
are three types of Configuration bits:
• System Operation Bits
These bits determine the power-on settings for
system-level components, such as the oscillator and
Watchdog Timer.
• Code-Protect Bits
These bits prevent program memory from being read
and written.
• Device ID Bits
These are read-only bits, which are located from
FF0000 to FF0003, and are unique to every device.
Table 4-2 provides the Configuration registers.
4.7.1
PROGRAMMING METHODOLOGY
Configuration bits may be programmed, a single byte at
a time, using the PROGP command. This command
specifies the configuration data and Configuration
register
address.
When
Configuration
bits
are
programmed, any unimplemented or reserved bits
must be programmed with a ‘1’.
Eight PROGP commands are required to program the
Configuration bits. Figure 4-7 illustrates the flowchart
for Configuration bit programming.
4.7.2
PROGRAMMING VERIFICATION
After the Configuration bits are programmed, the
contents of memory should be verified to ensure that
the programming was successful. Verification requires
the Configuration bits to be read back and compared
against the copy held in the programmer‘s buffer. The
READP
command
reads
back
the
programmed
Configuration bits and verifies that the programming
was successful.
Is
PROGD
response
PASS?
Are
RemainingWords
‘0’?
RemainingWords = 256 (100h)
BaseAddress = 0
RemainingWords =
RemainingWords – 1
BaseAddress =
BaseAddress + 02h
No
No
Yes
Yes
Start
Failure
Report Error
Send PROGD
Command to Program
BaseAddress
Finish
Note:
If the General Segment Code-Protect bit
(GCP) is programmed to ‘0‘, code memory
is code-protected and cannot be read. Code
memory must be verified before enabling
code
protection.
See
Section 4.7.3
“Code-Protect Configuration Bits” for
more
information
on
code-protect
Configuration bits.



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