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PIC18F46K22 Datasheet(PDF) 10 Page - Microchip Technology

Part # PIC18F46K22
Description  Flash Memory Programming Specification
Download  42 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F46K22 Datasheet(HTML) 10 Page - Microchip Technology

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PIC18(L)F2XK22/4XK22
DS41398B-page 10
Advance Information
 2010 Microchip Technology Inc.
2.4
High-Level Overview of the
Programming Process
Figure 2-11 shows the high-level overview of the
programming process. First, a Bulk Erase is performed.
Next, the code memory, ID locations and data
EEPROM are programmed. These memories are then
verified to ensure that programming was successful. If
no errors are detected, the Configuration bits are then
programmed and verified.
FIGURE 2-11:
HIGH-LEVEL
PROGRAMMING FLOW
2.5
Entering and Exiting High-Voltage
ICSP Program/Verify Mode
As shown in Figure 2-12, the High-Voltage ICSP
Program/Verify mode is entered by holding PGC and
PGD low and then raising MCLR/VPP/RE3 to VIHH
(high voltage). Once in this mode, the code memory,
data EEPROM, ID locations and Configuration bits can
be accessed and programmed in serial fashion.
Figure 2-13 shows the exit sequence.
The sequence that enters the device into the Program/
Verify mode places all unused I/Os in the high-impedance
state.
FIGURE 2-12:
ENTERING HIGH-VOLTAGE
PROGRAM/VERIFY MODE
FIGURE 2-13:
EXITING HIGH-VOLTAGE
PROGRAM/VERIFY MODE
Start
Program Memory
Program IDs
Program Data EE
Verify Program
Verify IDs
Verify Data
Program
Configuration Bits
Verify
Configuration Bits
Done
Perform Bulk
Erase
MCLR/VPP/RE3
P12
PGD
PGD = Input
PGC
VDD
D110
P13
P1
MCLR/VPP/RE3
P16
PGD
PGD = Input
PGC
VDD
D110
P17
P1


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