Table of Contents
Advertisement
Quick Links
NXP Semiconductors
User's Guide
TWR-KL28Z User's Guide
1. Introduction
The Tower development platform is a set of software
and hardware tools for evaluation and development. It is
an ideal tool for the rapid prototyping of
microcontroller-based applications.
The TWR-KL28Z supports power supply voltage range
from 1.71 V to 3.6 V. It features a KL28Z, a device
boasting a maximum operating frequency of 72 MHz,
up to 512 KB Flash and numerous analog and digital
peripherals.
The TWR-KL28Z includes the ARM open standard
embedded serial and debug adapter known as CMSIS-
DAP. This circuit offers the user several options for
serial communications, flash programming, and run-
control debugging.
The TWR-KL28Z microcontroller module is designed
to work either in standalone mode or as part of the
Tower System, a modular development platform that
enables rapid prototyping and tool re-use through
reconfigurable hardware.
© 2016 NXP B.V.
Document Number: TWRKL28ZUG
Contents
1.
Introduction .................................................................... 1
2.
Getting Started ................................................................ 2
3.
TWR-KL28Z Features ..................................................... 2
4.
TWR-KL28Z Hardware Description ................................ 4
4.1.
Power supply ........................................................ 4
4.2.
Serial and debug adapter (OpenSDA) .................... 5
4.3.
Microcontroller ..................................................... 6
4.4.
Capacitive touch pad ............................................. 9
4.5.
I2C Accelerometer Sensor ..................................... 9
4.6.
LED ................................................................... 11
4.7.
Analog reference voltage..................................... 11
4.8.
Input/output headers............................................ 12
5.
References .................................................................... 13
6.
Revision History ........................................................... 13
Rev. 0 , 06/2016
Advertisement
Table of Contents
Related Manuals for NXP Semiconductors TWR-KL28Z
Summary of Contents for NXP Semiconductors TWR-KL28Z
-
Page 1: Table Of Contents
4.1. Power supply ............4 4.2. Serial and debug adapter (OpenSDA) ....5 The TWR-KL28Z supports power supply voltage range 4.3. Microcontroller ............. 6 from 1.71 V to 3.6 V. It features a KL28Z, a device 4.4. Capacitive touch pad ..........9 4.5. -
Page 2: Getting Started
I/O with a large ecosystem of compatible hardware, a flexible programming and debug interface, and a large ecosystem of software development environments. 2. Getting Started Refer to the TWR-KL28Z Quick Start Package for step-by-step instructions for getting started with the freedom board. See the “Jump Start Your Design” section at nxp.com/FREDEVPLA for the Quick Start Package and software lab guides. - Page 3 TWR-KL28Z Features Figure 1. TWR-KL28Z block diagram Figure 2. TWR-KL28Z feature call-outs TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors...
-
Page 4: Twr-Kl28Z Hardware Description
4.1. Power supply The TWR-KL28Z offers a design with multiple power supply options. It can be powered from the USB connector, the VIN pin on the I/O header, or an off-board 1.71-3.6 V supply from the 3.3 V pin on the I/O header. -
Page 5: Serial And Debug Adapter (Opensda)
10-pin Cortex Debug connector (J30) as shown in Figure 5. In order to isolate the KL28Z MCU from the CMSIS-DAP circuit and use J30 to connect to an off-board TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors... -
Page 6: Microcontroller
(CDC) interface that bridges serial communications between the USB host and this serial interface. 4.3. Microcontroller The TWR-KL28Z is a MCU module featuring the MKL28Z512VLL7, a Kinetis microcontroller with USB 2.0 full-speed OTG controller in a 100 LQFP package. An on-board debug circuit, CMSIS-DAP, provides a SWD interface and a power supply input through a mini-USB connector, as well as serial to USB and CDC class compliant UART interface. - Page 7 32 MHz. An 8 MHz crystal is the default external source for the SCG oscillator inputs (XTAL/EXTAL). 4.3.2. Serial port The primary serial port interface signals are PTA1 and PTA2. These signals are connected to both the CMSIS-DAP and to the J1 I/O connector. TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors...
- Page 8 The Kinetis KL28 microcontrollers feature a dual-role USB controller with on-chip full-speed and low- speed transceivers. The USB interface on the TWR-KL28Z is configured as a full-speed USB device. J29 is the USB connector for this interface. As shown in Figure 6.
-
Page 9: Capacitive Touch Pad
It is interfaced through an I C bus and two GPIO signals as shown in Figure 8 Table 5 below. By default, the I C address is 0x1D. TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors... - Page 10 TWR-KL28Z Hardware Description Figure 8. MMA8451Q schematic diagram Table 5. Accelerometer FXOS8700CQ signal connections MMA8451Q KL28Z PTC11 PTC10 INT1 PTC5 INT2 PTC6 TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors...
-
Page 11: Led
Voltage Low (VREFL) pins to set high and low voltage references for the analog modules. By default VREFH is attached to P3V3_KL28Z (3.3 V Supply). VREFL is connected to GND. Figure 10. VREFH circuit schematic If desired, VREFH can use a VDDA independent reference by cut J35 jumper. TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors... -
Page 12: Input/Output Headers
The MKL28 MCU is packaged in a 100-pin LQFP. Some pins are utilized by on-board circuitry, but many are directly connected to one of four I/O headers (J13, J25, J24, J26) as shown in Figure 11 below. Figure 11. Input/output header TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors... -
Page 13: References
Revision History 5. References The reference documents for the TWR-KL28Z hardware are shown below. All documents can be found nxp.com • TWR-KL28Z Quick Start Guide • TWR-KL28Z User’s Guide • TWR-KL28Z Schematics PDF • KL28 Sub-Family Reference Manual 6. Revision History Table 6. - Page 14 How to Reach Us: Information in this document is provided solely to enable system and software Home Page: implementers to use NXP products. There are no express or implied copyright licenses nxp.com granted hereunder to design or fabricate any integrated circuits based on the information in this document.
Need help?
Do you have a question about the TWR-KL28Z and is the answer not in the manual?
Questions and answers