NXP Semiconductors TWR-KL43Z User manual

Freescale Semiconductor, Inc.
User’s Guide
© 2014 Freescale Semiconductor, Inc. All rights reserved.
1 TWR-KL43Z
The TWR-KL43Z microcontroller module is designed to
work either in standalone mode or as part of the Freescale
TowerSystem,amodulardevelopmentplatformthatenables
rapid prototyping and tool re-use through reconfigurable
hardware. Take your design to the next level and begin
constructing your Tower System today by visiting
Freescale.com/Tower for additional Tower System MCU
modules and compatible peripherals. For TWR-KL43Z
specific information and updates, visit
Freescale.com/TWR-KL43Z.
Document Number: TWRKL43ZUG
Rev. 1, 08/2014
Contents
1. TWR-KL43Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. TWR-KL43Z features . . . . . . . . . . . . . . . . . . . . . . . . . 2
4. Get to know the TWR-KL43Z . . . . . . . . . . . . . . . . . . 3
5. Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . 3
6. Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.2. Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6.3. Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.4. System power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6.5. Real-time clock (RTC) . . . . . . . . . . . . . . . . . . . . . . . . 6
6.6. Debug interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.7. UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.8. Infrared port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.9. Accelerometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.10. General Purpose Tower Plug-in (TWRPI) socket . . . . 8
6.11. Potentiometer, pushbuttons, LEDs . . . . . . . . . . . . . . . 9
6.12. SLCD TWRPI interface . . . . . . . . . . . . . . . . . . . . . . . 9
6.13. USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7. TWR-KL43Z jumper options . . . . . . . . . . . . . . . . . . 10
8. Useful links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9. Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TWR-KL43Z Tower Module
User’s Guide

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Contents
Figure 1. Freescale Tower system overview
2Contents
The TWR-KL43Z module includes:
• TWR-KL43Z board assembly
• Three-foot A to micro-B USB cable for debug interface and power
• Three-foot A to micro-B USB cable for MKL43Z256VLH4 USB interface
• Quick Start Guide
•TWRPI-sLCD
3 TWR-KL43Z features
• Tower compatible microcontroller module
• MKL43Z256VLH4 MCU (48 MHz, 256 KB Flash, 32 KB RAM, 16 KB ROM (Kibble), segment
LCD low-power, 64 LQFP package)
• Dual role USB interface with Micro-AB USB connector
• Touch Tower plug-in/sLCD socket
• General purpose Tower plug-in (TWRPI) socket
• On-board debug circuit MK20 openSDA serial debug interface with virtual serial port and mass
storage device bootloader
• 6-axis Xtrinsic sensor with integrated linear accelerometer and magnetometer (FXOS8700CQ)
• Four user-controllable LEDs
• Two (2) user pushbutton switch
• Infrared transmit and receive

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Get to know the TWR-KL43Z
• GPIO header for prototyping
• Potentiometer for ADC measurements
• 32.768 clock for RTC operation
• Power selectable 3.3V/1.8V
4 Get to know the TWR-KL43Z
Figure 2. Front side of TWR-KL46Z48M module (TWRPI device not attached)
5 Reference documents
Reference the documents listed below for more information on the Kinetis family, Tower System, and
MCU modules. These can be found in the documentation section at Freescale.com/TWR-KL43Z or
Freescale.com/Kinetis.
• TWR-KL43Z48M_QSG: Quick Start Guide
• TWR- KL43Z48M_SCH: Schematics
• TWR KL43Z48M_PWB: Design Package
• MKL43Z256VLH4 Reference Manual
• Tower Configuration Tool
• Tower Mechanical Drawing

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Hardware description
6 Hardware description
The TWR-KL43Z is a Tower MCU Module featuring the MKL43Z256VLH4 — a Kinetis microcontroller
with USB 2.0 full-speed device controllers in a 64-LQFP package. It is intended for use in the Freescale
Tower System but can operate standalone. An on-board OpenSDA debug circuit provides a SWD interface
and a power supply input through a single USB mini-AB connector.
The block diagram of the TWR-KL43Z board is presented in Figure 3.
6.1 Block diagram
Figure 3. Block diagram of TWR-KL43Z
6.2 Microcontroller
The TWR-KL43Z is a Tower MCU module featuring the MKL43Z256VLH4 —a Kinetis microcontroller
with USB 2.0 full-speed device controller and segment LCD controller in a 64 LQFP package. It is
intended for use in the Freescale Tower System but can operate standalone. An on-board debug circuit,
OpenSDA, provides a SWD interface and a power supply input through a single USB mini-AB connector,
as well as serial to USB and CDC class compliant UART interface.
Table 1. Features of MKL43Z256VLH4
Feature Description
Ultra-low-power - 10 low-power modes with power and clock gating for optimal peripheral activity and
recoverytimes. Stopcurrentsof <190 nA (VLLS0), run currents of <280 uA/MHz, 4 s wake-up
from Stop mode
- Full memory and analog operation down to 1.71V for extended battery life
- Low-leakage wake-up unit with up to eight internal modules and eight pins as wake-up
sources in low-leakage stop (LLS)/very low-leakage stop (VLLS) modes
- Low-power timer for continual system operation in reduced power states

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Hardware description
6.3 Clocking
The Kinetis MCUs start up to the default reset clock for core/system clock, which is 8 MHz from IRC8M.
Software can enable the main external oscillator (EXTAL0/XTAL0), or to high frequency internal
reference (HIRC) 48 MHz if desired. The external oscillator/resonator can range from 32.768 KHz up to
a 32 MHz. An 8 MHz crystal is the default external source for the MCG lite oscillator inputs
(XTAL/EXTAL). A 32.768 KHz oscillator is connected to the real-time clock in input.
6.4 System power
When installed into a Tower System, the TWR-KL43Z can be powered from either an on-board source or
from another source in the assembled Tower System.
Flash, SRAM, ROM - 256 KB flash featuring fast access times, high reliability, and four levels of security
protection. No user or systeminterventiontocomplete programmingand erase functions and
full operation down to 1.71V.
- 32 KB of SRAM
- 16 KB of ROM with Kinetis bootloader included (UART, SPI, I2C, USB)
Mixed-signal capability - SAR 16-bit analog-to-digital converter (ADC)
- High-speed comparator (CMP) with internal 6-bit digital-to-analog converter (DAC)
- 12-bit digital-to-analog converter (DAC)
- VREF module 1,2V output
Performance - 48 MHz ARM Cortex-M0+ core
- Up to four channel DMA for peripheral and memory servicing with reduced CPUloading and
faster system throughput
- Cross bar switch enables concurrent multi-master bus accesses, increasing bus bandwidth
- Independent flash banks allowing concurrent code execution and firmware updating with no
performance degradation or complex coding routines
- Bit manipulation engine (BME) allows execution of single-instruction atomicbit-modify-write
operations on the peripheral address space
Timing and control - Three timer/PWM modules – one with six channel, and two with two channels
- Low-power timer
- Real-time clock
- Two-channel 32-bit periodic interrupt timer provides time base for RTOS task scheduler or
trigger source for ADC conversion, provides lifetime timer capability
Human-machine interface - Segment LCD controller up to 4x32 or 8x28 segments
- General-purpose input/output up to 54
Connectivity and
communications - USB full-speed slave controller with on-chip transceiver and 5V to 3.3V regulator, supporting crystal-less recovery
- USB low-voltage regulator supplies up to 120 mA off chip at 3.3 volts to power external
components from 5-volt input
- Two 16-bit SPI modules
- One UART module supporting ISO7816
- Two LPUART modules
- Two I2C modules supporting up to 1 Mbit/s
- One I2S (SAI) module
- One FlexIO module
Table 1. Features of MKL43Z256VLH4

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Hardware description
In standalone operation, the main power source (5.0V ) for the TWR-KL43Z48M module is derived from
either the OpenSDA USB micro-AB connector or the KL43 USB micro-AB connector (J5). Two
low-dropout regulators provide 3.3V and 1.8V supplies from the 5.0V input voltage. Additionally, the
3.3V regulator built into the KL43 can be selected to power the 3.3V bus. All the user selectable options
can be configured using two headers, J35, J25 or J28.
6.5 Real-time clock (RTC)
Y1 is a 32.768 kHz oscillator that can be connected to RTC_CLKIN via selection header J31. By enabling
the external clock input option in the RTC, it can be used as a highly precise time reference.
6.6 Debug interface
There are two debug interface options provided: the on-board OpenSDA circuit and an external ARM
SWD connector.
6.6.1 OpenSDA
An on-board MK20-OpenSDA circuit provides an SWD debug interface to the MKL43Z256. A standard
USB A male to micro-AB male cable (provided) can be used for debugging via the USB connector, J8.
The OpenSDA interface also provides a USB to serial bridge.
6.6.2 Cortex Debug SWD connector
The Cortex Debug SWD connector is a standard 2x5-pin (0.05") connector providing an external debugger
cable with access to the SWD interface of the MKL43Z256.
Table 2. Cortex Debug connector
Pin Function TWR-KL43Z Connection
1 VTref 3.3V MCU supply (V_BRD)
2 SWDIO PTA3/I2C1_SCL/FTM0_CH0/SWD_DIO
3 GND GND
4 SWCLK PTA0/ FTM0_CH5 /SWD_CLK
5 GND GND
6 NC
7 NC
8 NC
9 NC
10 nRESET PTA20/RESET

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Hardware description
6.7 UART
UART2 can be connected to OpenSDA or TWR-Elevators through jumpers J3 and J5.
J3 UART2_TX_TGTMCU – PTE22/UART2_TX
J3 UART2_RX_TGTMCU – PTE23UART2_RX
Figure 4. UART2 connection to OpenSDA CDC serial/elevator
6.8 Infrared port
An infrared transmit and receive interface is implemented as shown in Figure 5. The LPUART0_TX
(PTE20/ ADC0_DP0/LPUART0_TX) pin directly drives an infrared diode. The receiver uses an infrared
phototransistor connected to LPUART0_RX (PTE21/ ADC0_DM0/ UART0_RX) through a low-pass
filter.
Figure 5. Infrared circuit
6.9 Accelerometer
An FXOS8700CQ 6-Axis Xtrinsic sensor with integrated linear accelerometer and magnetometer is
connected to the MKL43Z256VLH4 MCU through I2C module, I2C1, and GPIO/IRQ signals, PTD6 and
PTD7. The device can be configured to generate inertial wake-up interrupt signals from any combination
of the configurable embedded functions allowing the FXOS8700CQ to monitor events and remain in a

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Hardware description
low-power mode during periods of inactivity. For more information on the FXOS8700CQ, visit the
FXOS8700CQ Product Summary Page at Freescale.com/FXOS8700CQ.
6.10 General Purpose Tower Plug-in (TWRPI) socket
The TWR-KL43Z features a socket (J22 and J14) that can accept a variety of different Tower Plug-in
modules featuring sensors, RF transceivers, and more. The General Purpose TWRPI socket provides
access to I2C, SPI, IRQs, GPIOs, timers, analog conversion signals, TWRPI ID signals, reset, and voltage
supplies. The pinout for the TWRPI socket is defined in Table 3.
Table 3. General Purpose TWRPI socket pinout
J22 J14
Pin Description Pin Description
1 5V VCC 1 GND
2 3.3 V VCC 2 GND
3 GND 3 I2C: SCL
4 3.3V VDDA 4 I2C: SDA
5 VSS (Analog GND) 5 GND
6 VSS (Analog GND) 6 GND
7 VSS (Analog GND) 7 GND
8 ADC: Analog 0 8 GND
9 ADC: Analog 1 9 SPI: MISO
10 VSS (Analog GND) 10 SPI: MOSI
11 VSS (Analog GND) 11 SPI: SS
12 ADC: Analog 2 12 SPI: CLK
13 VSS (Analog GND) 13 GND
14 VSS (Analog GND) 14 GND
15 GND 15 GPIO: GPIO0/IRQ
16 GND 16 GPIO: GPIO1/IRQ
17 ADC: TWRPI ID 0 17 GPIO: GPIO2
18 ADC: TWRPI ID 1 18 GPIO: GPIO3
19 GND 19 GPIO: GPIO4/Timer
20 Reset 20 GPIO: GPIO5/Timer

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Hardware description
6.11 Potentiometer, pushbuttons, LEDs
The TWR-KL43Z features two pushbutton switches connected to GPIO/interrupt signals, one pushbutton
connected to the master reset signal, four user-controllable LEDs, and a potentiometer connected to an
ADC input signal. Refer to Table 5 for information about which port pins are connected to these features.
6.12 SLCD TWRPI interface
Table 4 shows TWRPI/TWRPI-SLCD pin-out and corresponding connection to GD-6363P LCD.
TWRPI-SLCD connector is also compatible with other TWRPIs. It can accept touch TWRPI daughter
cards that may feature keypads, rotary dials, sliders, etc. As MKL43Z256 MCU does not support TSI the
only software GPIO method provided in TSS can be used for touch events detection.
Table 4. SLCD TWRPI socket pinout
Pin TWRPI LCD_n KL43 Module pin Module signal
1 P5V_TRG_USB
2V_BRD
3 PTB16/LCD_P12 LCD_P12 PTB16 1 COM0
4VDDA
5 PTB17/LCD_P13 LCD_P13 PTB17 2 COM1
6VSSA
7 PTB18/LCD_P14 LCD_P14 PTB18 3 COM2
8 PTB19/LCD_P15 LCD_P15 PTB19 4 COM3
9 PTC3/LCD_P23 LCD_P23 PTC3 5 3A/3B/3C/3D
10 PTB0/LCD_P0 LCD_P0 PTB0 6 T2/T3/AM/PM
11 PTB1/LCD_P1 LCD_P1 PTB1 7 3F/3G/3E/T1
12 PTB2/LCD_P2 LCD_P2 PTB2
13 PTB3/LCD_P3 LCD_P3 PTB3 8 2A/2B/2C/2D
14 PTC0/LCD_P20 LCD_P20 PTC0 9 2F/2G/2E/COL
15 PTC2/LCD_P22 LCD_P22 PTC2 10 1A/1B/1C/1D
16 PTC4/LCD_P24 LCD_P24 PTC4 11 1F/1G/1E/P1
17 PTD3/LCD_P43-ID0 LCD_P43 PTD3
18 PTD2/LCD_P42-ID1 LCD_P42 PTD2
19 GND
20 RST_TGT_MCU

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TWR-KL43Z jumper options
6.13 USB
The MKL43Z256 features USB full-speed slave controller with on-chip transceiver and 5 V to 3.3 V
regulator, supporting crystal-less recovery. The TWR-KL43Z routes the USB D+ and D- signals from the
KL43Z256 MCU directly to the on-board USB connector (J21).
7 TWR-KL43Z jumper options
NOTE:
Default configuration for power is OpenSDA USB with 3.3V voltage
selection.
Table 5. Jumper options
Jumper Function Jumper Default
Position Jumper Option KL43 Pin Name
Board power selection J28 1-2 1-2 P5V_TRG_USB
2-3 VBUS_ELEV
J25 Open 1-2 P5V_KL43_USB
VREG input power selection J16 1-2 1-2 P5V_TRG_USB
2-3 VBUS_ELEV P5V_VREGIN_K L43
J19 Open 1-2 P5V_KL43_USB P5V_VREGIN_K
L44
Voltage level selection J35 1-2 1-2 3.3V
2-3 1.8V
VREFH isolation (when onchip
VREF module enabled) J38 Open 1-2 VREFH to VDDA VREFH
Digital part of MCU power J12 1-2 Open - VDD isolated from
MCU_POWER VDD1, VDD2
Analog part of MCU power J10 1-2 Open - VDDA_HDR
isolated from
MCU_POWER
VDDA
Isolation between board and
MCU power J17 1-2 Open - V_BRD isolated from MCU_POWER
Isolation between MCU
VOUT33 and MCU power J11 Open 1-2 VOUT_3V3 to MCU_POWER
VLL3 to VDD enable J36 Open 1-2 VLL3 to VDD enable VLL3