Microchip Technology MPLAB ICD 4 Quick Start Manual page 2

ADDITIONAL INFORMATION
Target Circuit Design Precautions
Incorrect
Target V (tV )
DD DD
V
DD
V /MCLR
PP
XTAL*
V
2
1
5
PGC
4
PGD
3
AV **
DD
AV ** V
SS
SS
Target Application PC Board
Circuitry and Connector Pinouts
Correct
Target V (tV )
DD DD
V
DD
XTAL*
50 kΩ
Typical
V /MCLR
PP
2
1
5
PGC
4
PGD
3
AV **
DD
AV ** V
SS SS
Target Application PC Board
The modular cable with the
RJ-11 connector attaches
to the RJ-45 socket on the
MPLAB ICD 4.
RJ-11 to RJ-45 Pinouts
Pin
1
2
3
4
5
6
www.microchip.com/icd4
• Do not use greater than 100 µF capacitance on V
prevent the target from powering quickly when MPLAB ICD 4 is the source of power.
• Do not use capacitors on MCLR: They will prevent fast transitions of V
• Do not use multiplexing on PGC/PGD: They are dedicated for communications to
MPLAB ICD 4.
• Do not use capacitors on PGC/PGD: They will prevent fast transitions on data and
clock lines during programming and debug communications.
• Do not use diodes on PGC/PGD: They will prevent bidirectional communication
between MPLAB ICD 4 and the target PIC
• Do not exceed recommended cable lengths: Refer to the Hardware Specification of
the MPLAB ICD 4 online help or user's guide for cable lengths.
Typical cable length is 6 inches
Standard Connection
At Target
2 4 6
1 3 5
Bottom View
Of Target Board
RJ-11 Connector/Cable RJ-45 Socket
RJ-11 Function
JTAG Test Mode Select
Reserved
Standard Com Clock/
PGC (ICSPCLK)
TCK (JTAG Test Clock)
Standard Com Data/
PGD (ICSPDAT)
TDO (JTAG Test Data Output)
GND Ground
V _TGT Power On Target
dd
V Power
pp
JTAG Test Data Input
: Depending on the overall load, it will
dd
MCU.
®
Internal Circuitry (simplified)
* MPLAB ICD 4 is controlled by a 32-bit MCU with an Arm
** Target device must be running with an oscillator for the debugger to function
as a debugger.
*** If the device has AV and AV lines, they must be connected for the
dd ss
debugger to operate.
Pin RJ-45
1 TMs
2
3 PGC (ICSPCLK)
4 PGD (ICSPDAT)
5 GND
6 V _TGT
dd
7 V
pp
8 TDI
.
pp
MPLAB ICD 4
®
Target V
tV
DD DD
(tV ) is used
DD
V
PP
to power the
input/output
tV
DD
drivers in the
MPLAB ICD 4
tV debugger
DD
tV
DD
tV
DD
Cortex -M7 core.
® ®