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Copy Microcontroller PIC16F74 Code

We can Copy Microcontroller PIC16F74 Code, please view the Microcontroller PIC16F74 features for your reference:

If the code protection bit has not been programmed, the on-chip program memory can be read out for verification process. The first 64 locations can be read by the PIC16F74 regardless of the code protection bit setting when Copy Microcontroller.

The last memory location cannot be read if code protection is enabled on the PIC16F74. The last memory location can be read regardless of the code protection bit setting on the PIC16F74 if Copy Microcontroller.

Four memory locations are designated as ID locations where the user can store checksum or other code-identification numbers. These locations are not accessible during normal execution but are readable and writable during program/verify when Copy Microcontroller.

Use only the lower 4 bits of the ID locations and always program the upper 8 bits as ’0’s. The PIC16F74 microcontrollers with EPROM program memory can be serially programmed while in the end application circuit before Copy Microcontroller.

This is simply done with two lines for clock and data, and three other lines for power, ground, and the programming voltage. This allows customers to manufacture boards with unprogrammed devices, and then program the microcontroller just before shipping the product after Copy Microcontroller.

This also allows the most recent firmware or a custom firmware to be programmed. The device is placed into a program/verify mode by holdin   g the GP1 and GP0 pins low while raising the  MCLR (VPP) pin from VIL to VIHH (see programming specification) when Copy Microcontroller.

GP1 becomes the programming clock and GP0 becomes the programming data. Both GP1 and GP0 are Schmitt Trigger inputs in this mode if Copy Microcontroller.

 

After reset, a 6-bit command is then supplied to the device. Depending on the command, 14-bits of program data are then supplied to or from the device, depending if the command was a load or a read before Copy Microcontroller.

For complete details of serial programming, please refer to the PIC12C5XX Programming Specifications. A typical in-circuit serial programming connection is shown in Figure 8-16 after Copy Microcontroller.


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