Pin Utilization

Five pins are needed for ICSP programming. The pins are listed in the table below. For pin locations and packaging information, refer to the table in the “Appendix B” section.

Table 1. Pin Descriptions During Programming
Pin Name	During Programming
Pin Name	Function	Pin Type	Pin Description
ISCPCLK	ICSPCLK	I	Clock Input – Schmitt Trigger Input
ISCPDAT	ICSPDAT	I/O	Data Input/Output – Schmitt Trigger Input
MCLR/V_PP	Program/Verify mode	I⁽¹⁾	Program Mode Select
V_DD	V_DD	P	Power Supply
V_SS	V_SS	P	Ground
Legend: I = Input, O = Output, P = Power Note: 1.The programming high voltage is internally generated. To activate the Program/Verify mode, high voltage needs to be applied to the MCLR input. Since the MCLR is used for a level source, MCLR does not draw any significant current.