NXP Semiconductors KW45B41Z-EVK - Current Measurement

NXP Semiconductors
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Power source Manufacturing part
number
Power supply rail Description
From V_SEC supply
through jumper JP12
VDD_LDO_CORE Provides VDD_LDO_CORE power to the target
MCU
From V_SEC supply
through jumper JP14
VDD_RF Provides VDD_RF power to the target MCU
From P1V8_EXT supply
through jumper JP13
(DNP)
From VDD_DCDC supply
through jumper JP40
(DNP)
VOUT_SYS /
VDD_SYS
Provides VDD_SYS power (1.71 V – 2.75 V) to
the target MCU.
Note: If populated, JP13 must be programmed to
receive 2.5 V power to produce the VOUT_SYS /
VDD_SYS supply.
From VBOARD supply VCC_TGMCU • Produces VCC_IF_LINK supply
• Supplies power to four pole double throw
(4PDT) switch U18
• One of the two power supplies for voltage
translators (U23 and U24) and I2C repeater /
voltage translator U27
From VCC_TGMCU
through jumper JP28
VCC_IF_LINK • Supplies power to the target MCU JTAG /
serial wire debug (SWD) connector (J16), boot
configuration button (SW4), buffer U22, and
PIO0_31 pin of MCU-Link
• One of the two power supplies for voltage
translators U17, U19, U20, U21, and U29
U15 XC6227C331
PR-G (Torex
Semiconductor)
MLINK_3V3 (3.3 V) • Produces MCU_LINK_3V3 supply
• Supplies power to MCU-Link, MCU-Link
SWD connector (J15) (DNP), MCU-Link
LEDs, PIO1_8 pin of MCU-Link, and current
measurement circuit
• Another power supply for voltage translators
(U23 and U24) and I2C repeater / voltage
translator (U27)
• Another power supply for voltage translators
U17, U19, U20, U21, and U29
From MLINK_3V3 supply MCU_LINK_3V3 (3.3
V)
Supplies VDD and USB 3.3 V powers to MCU-
Link
Table 8. KW45B41Z-EVK power supplies...continued
The KW45B41Z-EVK board supports current measurement for board power supplies through the onboard
MCU-Link debug probe. For more details, see Section 3.8.
2.1.1 Current measurement
The KW45B41Z-EVK board supports the following two methods for measuring current on some of the board
power supplies:
• Using onboard MCU-Link current measurement circuit. This method is explained in Section 3.8.
• By connecting an ampere meter (ammeter) to two of the pins of a power supply jumper. This method is
described in Table 9.
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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