37 ICSP™ - In-Circuit Serial Programming™
ICSP™ programming allows customers to manufacture circuit boards with unprogrammed devices. Programming can be done after the assembly process, allowing the device to be programmed with the most recent firmware or a custom firmware. Five pins are needed for ICSP™ programming:
- ICSPCLK
- ICSPDAT
- MCLR/VPP
- VDD
- VSS
In Program/Verify mode the program memory, User IDs and the Configuration Words are programmed through serial communications. The ICSPDAT pin is a bidirectional I/O used for transferring the serial data and the ICSPCLK pin is the clock input. For more information on ICSP™ refer to “Memory Programming Specification” (DS40001874).