NXP Semiconductors KW45B41Z-EVK - LPSPI Interface

NXP Semiconductors
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
2.5 LPSPI interface
The target MCU has two Low-Power Serial Peripheral Interface (LPSPI) modules: LPSPI0 and LPSPI1. Each
LPSPI module can act as a SPI master or slave, and supports four peripheral chip selects (PCSes): PCS0,
PCS1, PCS2, and PCS3. The KW45B41Z-EVK board only supports LPSPI1 module, with all its PCSes.
Figure 18 shows the KW45B41Z-EVK LPSPI diagram.
Target side
Slave
KW45B41Z
MCU-Link
Voltage
translator
mikroBUS socket
connector J12
LPSPI1
Arduino socket
DH connector J2
QSPI NOR
flash memory
Ranger 4 socket
connector J5
Master
Master/slave
Master
Master
Slave
Slave
Slave
Slave
Slave
Slave
Debugger side
Master
PCS0
PCS3
PCS1
PCS2
PCS3
PCS3
PCS3
Figure 18. LPSPI diagram
Table 14 explains the KW45B41Z-EVK LPSPI connections.
PCS Voltage translator Slave device / MCU-Link
PCS0 16 Mbit (2 MB) QSPI NOR flash memory U4
(AT25XE161D-MAHN-T) for over-the-air (OTA)
programming or for storing non-volatile system
data or parameters
PCS1 Ranger 4 socket connector J5. It allows a
SPI connection between the target MCU and
plugged-in Ranger 4 UWB board.
PCS2 Arduino socket DH connector J2. It allows a
SPI connection between the target MCU and
plugged-in Arduino board.
Bidirectional voltage translator U24 (74AVC4
TD245BQ). It supports a USB-to-SPI bridge
between MCU-Link and the target MCU, by
shifting voltage levels of signals between the
two devices from 3.3 V to VCC_TGMCU and
vice versa. By default, the USB-to-SPI bridge is
disabled, as jumper JP34 is shorted. It can be
enabled by opening JP34.
MCU-Link (LPC55S69). The USB-to-SPI bridge
between MCU-Link and the target MCU can be
used for debugging the target MCU from MCU-
Link.
QSPI NOR flash memory (U4)
Arduino socket DH connector J2
PCS3
mikroBUS socket connector J12. It allows a
SPI connection between the target MCU and
plugged-in click board.
Table 14. KW45B41Z-EVK LPSPI connections
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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