38 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/V_PP
• V_DD
• V_SS

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” (DS40001970A).