NXP Semiconductors KW45B41Z-EVK - MCU-Link Status LEDs

NXP Semiconductors
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Note: The board also supports current measurement using an external device, such as an ammeter. This
current measurement method is described in Section 2.1.1.
Table 23 shows the required KW45B41Z-EVK jumper settings for measuring currents of various target MCU
power domains using onboard MCU-Link.
Target MCU power domain Corresponding power supply Required jumper settings
VDD_SWITCH VDD_SWITCH JP4: 2-3 shorted
VDD_DCDC VDD_DCDC JP7: 2-3 shorted
VDD_IO_ABC VDD_IO_ABC JP8: 2-3 shorted
VDD_ANA VDD_ANA JP9: 2-3 shorted
VDD_LDO_CORE VDD_LDO_CORE
VDD_RF VDD_RF
JP37: 2-3 shorted, JP10: 3-4 shorted
Table 23. Onboard current measurement
By default, onboard current measurement is disabled (jumper JP35 is shorted). For measuring current using
MCU-Link, JP35 must be open and corresponding power supply must be connected to MCU-Link current
measurement circuit.
To measure current for a target MCU power domain / target MCU power domains, follow these steps:
1. Open jumper JP35.
2. Use required jumper settings mentioned in Table 23 to connect the corresponding power supply /supplies
to MCU-Link current measurement circuit. On the KW45B41Z-EVK board, current measurement for
VDD_LDO_CORE and VDD_RF power domains can only be done together.
3.9 MCU-Link status LEDs
The KW45B41Z-EVK board has seven status indicator LEDs for MCU-Link. Table 24 lists these LEDs and
describes how each LED behaves in different MCU-Link modes. These LEDs are shown in Figure 2.
MCU-Link modePart
identifier
LED name /
color
Normal mode (with CMSIS-DAP
firmware)
Normal mode (with J-
Link firmware)
Firmware Update (ISP)
mode
D11 USB / green Lights up after successful USB
enumeration at startup. Afterward,
the LED stays ON.
Remains OFF Remains OFF
D12 SWO / green Indicates if serial wire debug
trace output (SWO) data is being
received from the target MCU
Remains OFF Remains OFF
D13 Status / red Indicates heartbeat (fades in/out
repeatedly), with SWD activity
overlaid.
The LED blinks rapidly at startup,
if an error occurs.
Remains OFF Lights up when MCU-Link
target (LPC55S69) boots
in ISP mode
D14 VCOM / green Indicates if VCOM port is
transmitting/receiving data
Lights up when MCU-
Link boots, and then
blinks when debug activity
happens
Remains OFF
D15 FUNC / green Reserved for future use Remains OFF Remains OFF
Table 24. MCU-Link LEDs
KW45B41Z-EVKUM All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved.
User manual Rev. 2 — 13 February 2023
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