Microchip Technology EV36W50A, Руководство пользователя

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• U104 – Gen3.3V that powers the USB hub IC ( U201 ), PKOB4 micro controller ( U300 ), along with the
associated circuits that connect the PKOB4 debugger to a host PC
For more details on the U102 and U104 voltage regulators, refer to the MCP1727 1.5A, Low Voltage, Low Quiescent
Current LDO Regulator Data Sheet ( DS21999 ).
3.1.3 Power Measurement Header (J400)
The current measurement header ( J400 ) measures the total current consumed by the WFI32E01PC module using a
multimeter. To measure the total current consumption of the WFI32E01PC module, remove the jumper (JP401) from
the
J400 header and connect a voltmeter across its pins. A 1Ω resistor option available on-board across the jumper
gives a 1:1 relationship between the voltage drop and current consumption.
For the direct current measurement, use a jumper wire to short the J400 pin 1-2 and connect a current clamp probe,
for example, the TEKTRONIX TCP0030A current probe. The normal probes with long wires may add a load to the
current path and introduce a voltage drop, which leads to incorrect readings.
For the current measurement in terms of voltage, mount the R400 with 0.1Ω resistor for Active mode and 1Ω resistor
for Sleep mode current consumption using a voltage probe or multimeter.
3.2 MPLAB PICKit On-Board 4 (PKOB4)
The MPLAB PICKit On-Board 4 (PKOB4) is a new generation of in-circuit debugger. The MPLAB PKOB4 programs
faster than its predecessor and is designed to use a high-speed USB 2.0 interface, providing a feature-rich
debugging experience via one USB cable. The MPLAB PKOB4 is intended to support the programming and
debugging interface. For more details on the MPLAB PKOB4, refer to the
MPLAB Snap In-Circuit Debugger User's
Guide ( DS50002787 ).
Features
• Connects to a computer through a Micro-B USB cable
• Programs devices using MPLAB X IDE or MPLAB X IPE
• Supports multiple hardware and software breakpoints, stopwatch and source code file debugging
• Debugs the application in real time
• Sets breakpoints based on internal events
• Monitors internal file registers
• Debugs at full speed
• Configures pin drivers
• Field-upgradeable through an MPLAB X IDE firmware download
• Adds new device support and features by installing the latest version of MPLAB X IDE
Note: The MPLAB X IDE is available for free at www.microchip.com/mplab-x-ide .
• Indicates debugger status using on-board LEDs
3.2.1 Recovery Method
When the MPLAB PKOB4 is unresponsive, use the MPLAB X IDE tool to recover the WFI32-IoT board through the
following recovery method:
1. Short the pin1 and pin2 of the connector (J301) to the ground for approximately 15 seconds; see the following
figure.
Note: Ensure that the WFI32-IoT board is turned ON to perform the recovery method.
EV36W50A
Hardware
©
2022 Microchip Technology Inc.
and its subsidiaries
User Guide
DS50003262A-page 10