NXP K32 L2: is an MCU module featuring the K32L2B3—a K32 L Series MCU in a 64 LQFP package. The K32L2B3 is a 32-bit Arm Cortex-M0+ core MCU clocked at 48 MHz and has memories of up to 256 KB of flash and 32 KB of SRAM. It includes two 8-bit Serial Peripheral Interfaces (SPI), USB FS device controller, UART, FlexIO module, and Timers. The module also features an on-board OpenSDA debug circuit that provides a SWD debug interface to the K32L2B31VLH0A and a USB-to-serial bridge.
NXP K32 L2: is an MCU module featuring the K32L2B3—a K32 L Series MCU in a 64 LQFP package. The K32L2B3 is a 32-bit Arm Cortex-M0+ core MCU clocked at 48 MHz and has memories of up to 256 KB of flash and 32 KB of SRAM. It includes two 8-bit Serial Peripheral Interfaces (SPI), USB FS device controller, UART, FlexIO module, and Timers. The module also features an on-board OpenSDA debug circuit that provides a SWD debug interface to the K32L2B31VLH0A and a USB-to-serial bridge.
FRDM-K32L2B3 Freedom Board
NXP Semiconductors Document identifier: FRDMK32L2B3UG
User's Guide Rev. 0, 04/2020
Contents
Chapter 1 Overview............................................................................................... 3
Chapter 2 FRDM-K32L2B3 features......................................................................4
Chapter 3 Get to know the FRDM-K32L2B3..........................................................5
Chapter 4 References ...........................................................................................6
Chapter 5 Hardware description............................................................................ 7
Chapter 6 FRDM-K32L2B3 jumper options and headers.................................... 10
Chapter 7 Known issue........................................................................................11
Chapter 8 Useful links..........................................................................................12
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Chapter 1
Overview
The FRDM-K32L2B3 Freedom board is designed to work in a stand-alone mode or as the main board of the Arduino boards.
The FRDM-K32L2B3 is a modular development platform that enables rapid prototyping and tool reuse through reconfigurable
hardware.
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Chapter 2
FRDM-K32L2B3 features
The FRDM-K32L2B3 supports the following features:
• MK32L2B31VLH0A MCU (Arm
®
Cortex
®
-M0+ core, 48-MHz clock, up to 256 KB of Flash, 32 KB of RAM, 64LQFP
package)
• I/O headers for easy access to MCU I/O pins
• Compatible with Arduino boards
• On-board debug circuit: MK20DX128VFM5 (OpenSDA) with a virtual serial port
• NXP inertial sensor FXOS8700CQ
• Reset button and two user buttons
• 2 user LEDs
• Four-digit segment LCD module
• Dual-role USB interface with a micro USB connector
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Chapter 3
Get to know the FRDM-K32L2B3
Figure 1. FRDM-K32L2B3 top side
The FRDM-K32L2B3 features two MCUs: the target MCU and the serial and debug adapter (OpenSDA) MCU. The target MCU
is a K32 L series family device (K32L2B31VLH0A). The OpenSDA MCU is a Kinetis K series K20 family device
(MK20DX128VFM5).
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Chapter 4
References
The documents listed below should be referenced for more information on the K32 L series, Freedom System, and MCU modules.
These can be found in the documentation section at www.nxp.com/FRDM-K32L2B3.
• FRDM-K32L2B3-SCH (schematics)
• K32L2B3xRM (reference manual)
• Software package
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Chapter 5
Hardware description
FRDM-K32L2B3 is a Freedom MCU module featuring the K32L2B3—a K32 L Series MCU in a 64 LQFP package. An on-board
OpenSDA debug circuit provides the Serial Wire Debug (SWD) interface and a power supply input through a single micro-USB
connector. The block diagram of the FRDM-K32L2B3 board is shown in Figure 2.
Figure 2. Block diagram of FRDM-K32L2B3
5.1 MCU
FRDM-K32L2B3 features the K32L2B31VLH0A MCU. This 48-MHz MCU is a part of the K32 L family and it is implemented in a
64 LQFP package. The features of the K32L2B31VLH0A MCU are as follows:
• 32-bit Arm Cortex-M0+ core, 48 MHz
• Memories
— Up to 256 KB of flash
— 32 KB of SRAM
• Clocks
— Clock generation module with a High-frequency Internal Reference Clock (HIRC) of 48 MHz and two Low-frequency
Internal Reference Clocks (LIRC) of 2 MHz and 8 MHz for the system and CPU clock generation
— System oscillator supporting external crystals or resonators
— Low-power 1-KHz RC oscillator for the RTC and COP watchdog
• Analog peripherals
— 16-bit SAR ADC w/ DMA support
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— 12-bit DAC w/ DMA support
— Two high-speed analog comparators (CMP) with internal 6-bit Digital-to-Analog Converters (DAC)
— VREF 1.2 V voltage reference
• Connectivity and communications interfaces
— Two 8-bit Serial Peripheral Interfaces (SPI)
— USB FS device controller
— USB voltage regulator
— Two I
2
C modules
— Two low-power UART modules (LPUART)
— UART with an ISO7816 module
— FlexIO module (with 8 pins/4 shifters/4 timers implemented)
• Timers
— 6-channel Timer/PWM module
— Two 2-channel Timer/PWM modules
— 2-channel Periodic Interrupt Timer (PIT)
— Real-Time Clock (RTC)
— Low-Power Timer (LPT)
— System tick timer
• Human-Machine Interface (HMI)
— Segment LCD controller—the maximum segment is 8 x 28/4 x 32
— General-purpose input/output controller clocking
The K32 L series MCU starts up from the internal 48-MHz HIRC by default. The software can enable the main external oscillator
(EXTAL/XTAL) if desired. The external oscillator ranges from 4 MHz to 40 MHz. The 8-MHz oscillator is the default external
source for the system and RTC clocks (respectively) on the FRDM-K32L2B3 board.
5.2 System power
FRDM-K32L2B3 is compatible with DC 5 V and 3.3 V power supplies, because the K32L2B3 MCU can work at voltages from
1.71 V to 3.6 V.
The main power source for the FRDM-K32L2B3 module is derived from the OpenSDA USB micro-B connector (J13). One low-
dropout regulator provides a 3.3-V supply from the 5-V input voltage. Refer to the "POWER" page of the FRDM-K32L2B3
schematics for more details. The OpenSDA MK20DX128VFM5 is always powered by 3.3 V.
5.3 Debug interface
There are two debug interfaces provided: the on-board OpenSDA circuit and the external Arm Cortex SWD connector (J11). The
ARM Cortex SWD connector is a standard 10-pin connector that provides an external debugger cable access to the SWD interface
of the K32L2B31VLH0A. Alternatively, the on-board OpenSDA debug interface can be used to access the debug interface of the
K32L2B31VLH0A.
5.4 OpenSDA
The on-board MK20DX128VFM5-based OpenSDA circuit provides a SWD debug interface to the K32L2B31VLH0A. A standard
USB A male to micro-B male cable can be used for debugging via the USB connector (J13). The OpenSDA interface also provides
a USB-to-serial bridge. The drivers for the OpenSDA interface are at the official NXP website. These drivers and more utilities
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are at www.nxp.com/design/microcontrollers-developer-resources/ides-for-kinetis-mcus/opensda-serial-and-debug-
adapter:OPENSDA.
Figure 3. OpenSDA block diagram
5.5 Accelerometer and magnetometer
The FXOS8700CQ 6-axis digital sensor accelerometer and magnetometer is connected to the K32L2B31VLH0A MCU through
an the I
2
C interface (I2C0) and GPIO/IRQ signals (PTE24 and PTE25).
5.6 Pushbuttons, visible light sensor, and LEDs
FRDM- K32L2B3 also features:
• Two push-button switches: SW1-PTA4 and SW3-PTC3
• Visible light sensor connected to the ADC input signals (ADC0_SE3/PTE22)
• Two LEDs
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Chapter 6
FRDM-K32L2B3 jumper options and headers
FRDM-K32L2B3 jumper options and headers shows all jumper options on the FRDM-K32L2B3. The default installed jumper
settings are indicated by in bold.
Table 1. FRDM-K32L2B3 jumper options
Option Jumper Setting Description
K32L2 SWD CLK J18 ON Connect J11_4 to
K32L2_SWD_CLK
OFF Disconnect J11_4 to
K32L2_SWD_CLK
MCU VDD current
measurement
J17 ON Connect VDD to
VDD_K32L2B3
OFF Allow current measurement
on MCU VDD
VDD_K32L2 J20 ON Connect VDD_K32L2 to
P3V3_K32L2
OFF Disconnect VDD_K32L2 to
P3V3_K32L2
Visible light sensor J8 ON Connect visible light sensor
to PTE22
OFF Disconnect visible light
sensor to PTE22
SW3 J21 ON Connect SW3 to PTC3
OFF Disconnect SW3 to PTC3
VREGIN J7 ON Connect VREGIN to
P5V_K32L2
OFF Disconnect VREGIN to
P5V_K32L2
P3V3_SDA J9 ON Connect P3V3_SDA to
P3V3_VREG
OFF Disconnect P3V3_SDA to
P3V3_VREG
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Chapter 7
Known issue
In the SCH-46355 Rev A version, C1 is not DNP. Because there is only a weak internal pull-up resistor on the NMI pin (SW1), it
may cause an unexpected NMI interrupt at powerup if the NMI is enabled, or boot a ROM entry (if it is enabled). Removing
capacitor C1 prevents this. If a filter is required, an external pull-up resistor of 4.7 k and a capacitor of 100 pF are suggested. In
Rev A1, capacitor C1 is DNP.
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How To Reach Us
Home Page:
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Web Support:
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Information in this document is provided solely to enable system and software implementers to
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reserves the right to make changes without further notice to any products herein.
NXP makes no warranty, representation, or guarantee regarding the suitability of its products for
any particular purpose, nor does NXP assume any liability arising out of the application or use
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NXP B.V. 2020. All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 04/2020
Document identifier: FRDMK32L2B3UG
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NXP K32 L2 User guide
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NXP K32 L2: is an MCU module featuring the K32L2B3—a K32 L Series MCU in a 64 LQFP package. The K32L2B3 is a 32-bit Arm Cortex-M0+ core MCU clocked at 48 MHz and has memories of up to 256 KB of flash and 32 KB of SRAM. It includes two 8-bit Serial Peripheral Interfaces (SPI), USB FS device controller, UART, FlexIO module, and Timers. The module also features an on-board OpenSDA debug circuit that provides a SWD debug interface to the K32L2B31VLH0A and a USB-to-serial bridge.
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