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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.
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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
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Summary of Contents for NXP Semiconductors TWR-KL28Z72M
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Page 1: Table Of Contents
NXP Semiconductors Document Number: TWRKL28ZUG User's Guide Rev. 0 , 06/2016 TWR-KL28Z User’s Guide 1. Introduction Contents The Tower development platform is a set of software Introduction ..............1 and hardware tools for evaluation and development. It is Getting Started ..............2 TWR-KL28Z Features ............. -
Page 2: Getting Started
MCU is the MK20DX128VFM5. Figure 1 shows a block diagram of the TWR-KL28Z board. The primary components and their location on the hardware assembly are pointed out in Figure TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors Arrow.com. Arrow.com. Downloaded from Downloaded from... - 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 Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from...
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Page 4: Twr-Kl28Z Hardware Description
Output from jumper header, to select V_BRD, VREGOUT_KL28. Also could be supplied MCU_PWR externally via header pin Output from jumper header to select MCU_PWR. Also could be supplied externally via VDDA header pin. TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from... -
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 Arrow.com. Arrow.com. Arrow.com. Arrow.com. -
Page 6: Microcontroller
Flash, SRAM, ROM and full operation down to 1.71 V - 128 KB of SRAM - 32 KB of ROM with Kinetis bootloader included (UART, SPI, I C, USB-HID) TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. - Page 7 (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 Arrow.com. Arrow.com. Arrow.com. Arrow.com.
- Page 8 Table 4. ARM JTAG/SWD mini connector description Function Connection to KL28Z VTref P3V3_MCU SWDIO/TMS PTA3 SWDCLK/TCK PTA0 SWO/TDO TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from Downloaded from Downloaded from...
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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 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. - 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 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Downloaded from...
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Page 11: Led
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 Arrow.com. Arrow.com. Arrow.com. -
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 Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. -
Page 13: References
• TWR-KL28Z Schematics PDF • KL28 Sub-Family Reference Manual 6. Revision History Table 6. Revision history Revision number Date Substantive changes 06/2016 Initial release TWR-KL28Z User’s Guide, Rev. 0, 06/2016 NXP Semiconductors Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com. - 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.
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