1.2 Pin Utilization

Five pins are needed for ICSP programming. The pins are listed in Table 1-1. For pin locations and packaging information, refer to Table 6-1.

Table 1-1. Pin Descriptions During Programming
Pin NameDuring Programming
FunctionPin TypePin Description
ISCPCLKICSPCLKIClock Input – Schmitt Trigger Input
ISCPDATICSPDATI/OData Input/Output – Schmitt Trigger Input
MCLR/VPPProgram/Verify modeI(1)Program Mode Select
VDDVDDPPower Supply
VSSVSSPGround

Legend: I = Input, O = Output, P = Power

Note:
  1. The programming high voltage is internally generated. To activate the Program/Verify mode, a 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.