Microchip Technology MPLAB PICkit 4, User Manual

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The V
DD
sense connection draws very little current from the target processor. The actual power comes from the
MPLAB PICkit 4 In-Circuit Debugger system, as the V
DD
sense line is used as a reference only to track the target
voltage.
The clock and data connections are interfaces with the following characteristics:
• Clock and data signals are in high-impedance mode (even when no power is applied to the MPLAB PICkit 4 In-
Circuit Debugger system).
• Clock and data signals are protected from high voltages caused by faulty target systems, or improper
connections.
• Clock and data signals are protected from high current caused from electrical shorts in faulty target systems.
Table 11-4. Electrical Logic Table
Logic Inputs V
IH
= V
DD
x 0.7V (min.)
V
IL
= V
DD
x 0.3V (max.)
Logic Outputs V
DD
= 5V V
DD
= 3V V
DD
= 2.3V V
DD
= 1.4V
V
OH
= 3.8V min. V
OH
= 2.4V min. V
OH
= 1.9V min. V
OH
= 1.0V min.
V
OL
= 0.55V max. V
OL
= 0.55V max. V
OL
= 0.3V max. V
OL
= 0.1V max.
Figure 11-2. MPLAB
®
PICkit
™
4 Debugger Connector Pinout
Hardware Specification
©
2020 Microchip Technology Inc.
User Guide
DS50002751D-page 59