NXP Semiconductors FRDM-MCXN947 - Jumpers

NXP Semiconductors
UM12018
FRDM-MCXN947 Board User Manual
Part
identifier
Connector type Description Reference section
J16 RJ45 connector Shielded RJ45 connector jack with magnetic
built-in
Section 2.4
J17 USB connector MCU-Link USB connector Section 3.7
J23 2 x 5 pin header Debug (JTAG / SWD) connector to connect an
external debug probe or external debug target
Section 3.8
Table 2. FRDM-MCXN947 connectors...continued
1.6 Jumpers
Table 3 describes the FRDM-MCXN947 jumpers. The jumpers are shown in Figure 4.
Part
identifier
Jumper type Description Reference section
J18 1x2 pin header • Open (default setting): MCU-Link VCOM port is enabled.
• Shorted: Sends a low signal on LPC_HW_VER_6 to
disable MCU-Link VCOM port
Section 3.8
J19 1x2 pin header • Open (default setting): Enables the MCU-Link SWD
feature
• Shorted: Sends a low signal on LPC_HW_VER_7 to
disable the onboard MCU-Link SWD feature
Note: This configuration is required to enable target MCU
debug through an external debug probe.
Section 3.3
J21 1x2 pin jumper MCU-Link (LPC55S69) force ISP mode jumper:
• Open (default setting): MCU-Link follows the normal
boot sequence (MCU-Link boots from internal flash if a
boot image is found). With the internal flash erased, the
MCU-Link normal boot sequence falls through to ISP boot
mode.
• Shorted: MCU-Link is forced to ISP mode (USB). Use this
setting to reprogram the MCU-Link internal flash with a
new image or use the MCUXpresso IDE with the CMSIS-
DAP protocol.
Note: By default, MCU-Link flash is preprogrammed with a
version of CMSIS-DAP firmware.
Section 3.5
J22 1x2 pin jumper MCU-Link SWD clock enable jumper:
• Open: MCU-Link SWD clock is disabled.
• Shorted (default setting): MCU-Link SWD clock is
enabled.
For more information
on this jumper, see
the FRDM-MCXN947
schematic
J24 1x2 pin header Pin 1-2 shorted (default setting): P3V3_MCU is sourced
from the P3V3 power supply
Section 2.1.1
J25 (DNP) 1x2 pin jumper DNP by default.
If shorted, VDD_IO_USB is powered by P3V3_MCU through
the jumper.
Note: BY default, VDD_IO_USB is powered from the P3
V3_MCU supply through a zero-ohm shunt resistor.
Section 2.1.1
J26 (DNP) 1x2 pin jumper DNP by default. Section 2.1.1
Table 3. FRDM-MCXN947 jumpers
UM12018 All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved.
User manual Rev. 1 — 20 January 2024
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