Connecting External Debuggers - Microchip Technology PIC16F15376 Curiosity Nano Hardware User's Manual

7.4

Connecting External Debuggers

Even though there is an on-board debugger, external debuggers can be connected directly to the PIC16F15376
Curiosity Nano to program/debug the PIC16F15376. The on-board debugger keeps all the pins connected to the
PIC16F15376 and board edge in tri-state when not actively used. Therefore, the on-board debugger will not interfere
with any external debug tools.
Figure 7-5. Connecting the MPLAB PICkit
Nano
CAUTION
CAUTION
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2019 Microchip Technology Inc.
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MPLAB® PICkit™ 4
NC
ID
CDC RX
CDC TX
DBG1
DBG2
The MPLAB PICkit 4 In-circuit Debugger/Programmer is capable of delivering high voltage on the MCLR
pin. R110 can be permanently damaged by the high voltage. If R110 is broken, the on-board debugger can
not enter programming mode of the PIC16F15376, and will typically fail at reading the device ID.
To avoid contention between the external debugger and the on-board debugger, do not start any
programming/debug operation with the on-board debugger through Microchip MPLAB
programming while the external tool is active.
PIC16F15376 Curiosity Nano
™
4 In-Circuit Debugger/Programmer to PIC16F15376 Curiosity
8 7 6 5 4 3 2 1
MCLR
V
Ground
CLOCK DATA
USB
PS LED
DEBUGGER
CURIOSITY NANO
User Guide
1 = MCLR
2 = V DD
3 = Ground
4 = PGD
5 = PGC
6 = Unused
7 = Unused
8 = Unused
DD
VBUS
VOFF
DBG3
DBG0
GND
VTG
®
X or mass storage
50002900B-page 24
Appendix