Freescale Semiconductor TWR-K65F180M User manual

© 2015 Freescale Semiconductor, Inc. All rights reserved.
TWR-K65F180M User's Guide
1 Introduction
The K65F180M Tower MCU Module
(TWR-K65F180M) is a low-cost evaluation,
demonstration, and development board, which features
the Kinetis 180 MHz K65 low-power MCU. The
TWR-K65F180M microcontroller module can operate in
stand-alone mode or as part of the Freescale Tower
System, a modular development platform that enables
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
microcontroller modules and compatible peripherals.
Freescale Semiconductor, Inc.
Document Number: TWRK65F180MUG
User's Guide
Rev. 0
,
05/2015
Contents
1Introduction 1
1.1 Features.....................................................................2
1.2 Getting started...........................................................3
2Contents 3
3Hardware description 4
3.1 K65F180M microcontroller........................................4
3.2 Clocking....................................................................5
3.3 System power............................................................5
3.4 Tamper module (Dryice) and Real-Time Clock supply6
3.5 Serial and Debug Adapter version 2 (OpenSDAv2).....6
3.6 Cortex Debug connector.............................................7
3.7 External Bus Interface –FlexBus................................7
3.8 SDRAM....................................................................8
3.9 Accelerometer ...........................................................8
3.10 Potentiometer, Pushbuttons, LEDs..............................8
3.11 General Purpose Tower Plug-in (TWRPI) socket ........9
3.12 Touch interface..........................................................9
3.13 USB interface ..........................................................10
3.14 Secure digital card slot.............................................10
3.15 Ethernet and 1588....................................................11
4Jumper table 11
5Input/output connectors and pin usage table 13
6Elevator connections 14
7References 16
8Revision history 17

TWR-K65F180M User's Guide, Rev. 0,05/2015
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1.1 Features
The following list summarizes the features of the K65F180M Tower MCU boards:
Tower compatible processor board
K20 based OPENSDA circuit
Four user-controlled status LEDs
Two Capacitive Touch Pads and two mechanical push buttons
Socket for Tower Plug-in (TWRPI, for instance a sensor board)
Standalone high speed USB host and device function
Potentiometer
SDRAM connection
MMA8451Q three-axis accelerometer
Battery holder for 20 mm lithium battery (battery diameter 20 mm, thickness 25 mm)
Board power select with 3.3 V or 1.8 V MCU operation
MicroSD card slot
OpenSDA USB
Figure 1. Front side of the TWR-K65F180M module
OpenSDA
USB
K20 JTAG
Reset
SW3
SW2
K65 JTAG
K65
USB
Touch Pad
SD card slot
SDRAM
K65FN2M0VMI18

TWR-K65F180M User's Guide, Rev. 0,05/2015
Freescale Semiconductor, Inc. 3
Figure 2. Back side of the TWR-K65F180M module
1.2 Getting started
You can find a printed version of the Quick Start Guide in the TWR-K65F180M box that contains the
list of recommended steps for getting started.
2 Contents
The TWR-K65F180M includes:
TWR-K65F180M for board assembly
Quick Start Guide
USB A to mini-B cable for debug interface and power supply
CR2032 coin cell battery for VBAT power supply
USB A to micro-B cable for K65FN2M0VMI18 USB interface
Battery
Receptacle
VBAT

TWR-K65F180M User's Guide, Rev. 0,05/2015
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3 Hardware description
The TWR-K65F180M is a Tower MCU Module featuring the K65FN2M0VMI18 –an ARM®
Cortex®-M4F based MCU with 2 MB on-chip flash, 256 KB on-chip SRAM, SDRAM controller and
dual USB controllers in a 169 pin MAPBGA package. It has a maximum core operating frequency of
180 MHz. It is intended for use in the Freescale Tower System but can operate as a stand-alone module.
An on-board debug circuit, OPENSDA, provides the SWD debug interface and power supply input
through a single USB mini-AB connector. The following sections describe the hardware in more detail.
This figure shows a block diagram for the TWR-K65F180M.
MK20DX128VFM5
K20 MCU
Digital
Accelerometer
MMA8451Q
SDRAM
2M x 32-bit
RESET
Button
JTAG
9-PIN
JTAG
19-PIN
ENET 1588
Header
MMC-SD
Card Slot
General Purpose
Tower Plug-in
Headers
INTERRUPT
Buttons
POTENTIOMETER
5K Ohm
XTAL
8 MHz
LPC
Logic
TOUCH
Pads
Tower Elevator Expansion Connectors
I2S, SPI, I2C, ADC, USB, DAC, PWM, TMR, CAN, IRQs, GPIOs, UARTs, Flexbus, Ethernet
5 V 3.3 V
USB
MINI-B
5 V
USB
Micro-AB
5 V
3.3 V
LDO
1.8 V
LDO
TAMPER
Header
Freescale Devices External Connectors Interface Circuits Power Devices
XTAL
16 MHz
GPIO
UART
SWD
FS USB
FS USB
SDHC
I2C
VBAT
JTAG
GPIO ADC
JTAG
50 MHz
1588 TMR
HS USB
SDRAM BUS
TAMPER
RESET
LED
Yellow/Orange
Green/Blue
I2C/SPI/ADC/GPIO
sheet 8
sheet 4
XTAL
32.768 KHz
TSI
sheet 4
sheet 7
sheet 4 sheet 4
sheet 5 sheet 5
sheet 5sheet 5
sheet 5
sheet 5 sheet 5
sheet 6
sheet 6
sheet 6
sheet 6
sheet 6
sheet 7
sheet 7
sheet 7
sheet 7
sheet 4
sheet 7
BATTERY
Holder
3 V
sheet 4
MK65FN2M0VMI18
K65 MCU
RTC
Figure 3. TWR-K65F180M Block Diagram
3.1 K65F180M microcontroller
The TWR-K65F180M module features the K65FN2M0VMI18. The K65 microcontroller family is part
of the Kinetis portfolio of devices built around an ARM Cortex-M4F core. Refer to the K65 Family
Reference Manual (document K65P169M180SF5RMV2) for comprehensive information on the
K65FN2M0VMI18 device. The key features of K65FN2M0VMI18 are as follows.

TWR-K65F180M User's Guide, Rev. 0,05/2015
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Table 1. K65FN2M0VMI18 key features
Feature
Description
Performance
Up to 180 MHz ARM Cortex-M4 based core with DSP instructions and
Single Precision Floating Point unit
Memory and memory expansion
2 MB program flash memory and 256 KB RAM
FlexBus external bus interface and SDRAM controller
Analog modules
Two 16-bit SAR ADCs and two 12-bit DACs
Four analog comparators (CMP) containing a 6-bit DAC and
programmable reference input
Voltage reference 1.2 V
Communication interfaces
Ethernet controller with MII and RMII interface to external PHY and
hardware IEEE 1588 capability
USB high-, full-, and low-speed On-the-Go with on-chip high speed
transceiver
USB full-, low-speed OTG with on-chip transceiver
Two CAN, three SPI and four I2C modules
One low power UART and five standard UARTs
Secure Digital Host Controller (SDHC)
I2S module
Security
Tamper detect and secure storage
Hardware random-number generator
Supports DES, AES, SHA accelerator (CAU)
Multiple levels of embedded flash security
Timers
Four periodic interrupt timers
16-bit low-power timer
Two 16-bit low-power timer PWM modules
Two 8-channel motor control / general purpose / PWM timers
Two 2-channel quad decoder / general purpose timers
Real-time clock
Human machine interface
Low-power hardware touch sensor interface (TSI)
General-purpose input / output
3.2 Clocking
The Kinetis microcontrollers start up from an internal digitally controlled oscillator (DCO). The
software can enable one or two external oscillators if required. The external oscillator for the
Multipurpose Clock Generator (MCG) module can range from 32.768 kHz up to a 32 MHz crystal or
ceramic resonator. The external oscillator for the Real-Time Clock (RTC) module accepts a 32.768 kHz
crystal.
Two crystals are provided on-board for clocking the K65F180M device: a 16 MHz crystal as the main
oscillator to clock the MCG module and a 32.768 kHz crystal for clocking the RTC module.
NOTE
The on-chip HS USB PHY requires a 12, 16, or 24 MHz crystal with the
main oscillator on EXTAL0 and XTAL0 pins.
3.3 System power
In standalone operation, the main power source for the TWR-K65F180M is derived from the 5.0 V input
from either the USB mini-B connector, J7, or the debugger header, J18, when a shunt is placed on
jumper J21. An on-board low-dropout regulator provides either 3.3 V or 1.8 V supply from the 5.0 V

TWR-K65F180M User's Guide, Rev. 0,05/2015
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input voltage based on the configuration of jumper J9. See sheet 5 of the TWR-K65F180M Schematics
(document TWR-K65F180M-SCH) for further details.
When installed into a Tower System, the TWR-K65F180M can be powered from either an on-board
power source or from another power source in the assembled Tower System. If both the on-board and
off-board power sources are available, the TWR-K65F180M will default to the off-board power source.
The 3.3 V or 1.8 V power supplied to the MCU is routed through a jumper, J1. The jumper shunt can be
removed to allow the following:
1) Alternate MCU supply voltages to be injected.
2) Measurement of power consumed by the MCU.
3.4 Tamper module (Dryice) and Real-Time Clock supply
The Dryice tamper detection module and the Real-Time Clock (RTC) module on the K65FN2M0VMI18
have two modes of operation: system power up and system power down. During system power down,
the tamper detection module and the RTC are powered from the backup power supply (VBAT) and
electrically isolated from the rest of the MCU. The TWR-K65F180M provides a battery receptacle for a
coin cell battery that can be used as the VBAT supply. The receptacle uses standard 20 mm diameter
3 V lithium coin cell batteries.
3.5 Serial and Debug Adapter version 2 (OpenSDAv2)
OpenSDAv2 is a serial and debug adapter circuit which includes an open-source hardware design, an
open-source bootloader, and debug interface software. It bridges serial and debug communications
between a USB host and an embedded target processor as shown in figure 4. The hardware circuit is
based on a Freescale Kinetis K20 family MCU with 128 KB of embedded flash and an integrated USB
controller. OpenSDAv2 comes preloaded with the CMSIS-DAP bootloader—an open-source mass
storage device (MSD) bootloader—and the CMSIS-DAP interface firmware (also known as the mbed
interface), which provides an MSD flash programming interface, a virtual serial port interface, and a
CMSIS-DAP debug protocol interface. For more information on the OpenSDAv2 software, see
mbed.org and https://github.com/mbedmicro/CMSIS-DAP.
OpenSDAv2
OpenSDA MCU
K20DX128Vxx5
MSD Bootloader
OpenSDAv2
Application
UART TX/RX
GPIO
Serial Terminal
File System
SWD/JTAG
LED PWM
USB Host
IDE GPIO/ADC
SPI, GPIO
USB
Target
Processor
nRESET
UART RX/TX
Figure 4. OpenSDAv2 high-level block diagram

TWR-K65F180M User's Guide, Rev. 0,05/2015
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OpenSDAv2 is managed by a Kinetis K20 MCU built on the ARM Cortex-M4 core. The OpenSDAv2
circuit includes a status LED (D3) and a pushbutton (SW1). The pushbutton asserts the Reset signal to
the K65 target MCU. It can also be used to place the OpenSDAv2 circuit into bootloader mode. SPI and
GPIO signals provide an interface to either the SWD debug port or the K20. Additionally, signal
connections are available to implement a UART serial channel. The OpenSDAv2 circuit receives power
when the USB connector J7 is plugged into a USB host.
3.6 Cortex Debug connector
The Cortex Debug connector is a 20-pin (0.05 inch) connector providing access to the SWD, JTAG, and
EzPort signals available on the K65 device. The K65 pin connections to the debug connector (J18) are
shown in this table.
Table 2. Cortex Debug connector pinout
Pin
Function
TWR-K65F180M connection
1
VTref
3.3 V MCU supply (MCU_PWR)
2
TMS/SWDIO
PTA3/UART0_RTS_b/FTM0_CH0/JTAG_MS/SWD_DIO
3
GND
GND
4
TCK/SWCLK
PTA0/UART0_CTS_b/FTM0_CH5/JTAG_CLK/SWD_CLK/EZP_CLK
5
GND
GND
6
TDO/SWO
PTA2/UART0_TX/FTM0_CH7/JTAG_DO/TRACE_SWO/EZP_DO
7
Key
—
8
TDI
PTA1/UART0_TX/FTM0_CH6/JTAG_DI/EZP_DI
9
GNDDETECT
PTA4/FTM0_CH1/MS/NMI_b/EZP_CS_b
10
nReset
RESET_b
11
Target Power
5 V supply (via J21)
12
TRACECLK
PTE0/SPI1_PCS1/UART1_TX/SDHC0_D1/TRACE_CLKOUT
13
Target Power
5 V supply (via J21)
14
TRACEDATA[0]
PTE4/SPI1_PCS0/UART3_TX/SDHC0_D3/TRACE_D0
15
GND
GND
16
TRACEDATA[1]
PTE3/SPI1_SIN/UART1_RTS_b/SDHC0_CMD/TRACE_D1
17
GND
GND
18
TRACEDATA[2]
PTE2/SPI1_SCK/UART1_CTS_b/SDHC0_DCLK/TRACE_D2
19
GND
GND
20
TRACEDATA[3]
PTE1/SPI1_SOUT/UART1_RX/SDHC0_D0/TRACE_D3
NOTE
To avoid conflict with RMII signals, trace signals are routed to the PTE
port with unpopulated 0 Ohm resistors to avoid signal conflicts with
SDHC.
3.7 External Bus Interface –FlexBus
The K65 device features a multi-function external bus interface called the FlexBus interface controller.
This is capable of interfacing with slave-only devices. The FlexBus interface is not used directly on the
TWR-K65F180M. Instead, a subset of the FlexBus is connected to the Primary Connector so that the
external bus can access devices on Tower peripheral modules. See Table 6 “Error! Reference source
not found.” and sheet 8 of the TWR-K65F180M Schematics (document TWR-K65F180M-SCH) for
more details.

TWR-K65F180M User's Guide, Rev. 0,05/2015
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3.8 SDRAM
The TWR-K65F180M board contains 64 Mb SDRAM (32-bit width) which is connected to the K65
SDRAM controller. The SDRAM signals are multiplexed with Flexbus signals. See the K65 Family
Reference Manual (document K65P169M180SF5RMV2) “Flexbus signal multiplexing” section and
“SDRAM SDR signal multiplexing” section on how to use the Flexbus and SDRAM in multiplexed
mode.
3.9 Accelerometer
An MMA8451Q digital accelerometer is connected to the K65 MCU through an I2C interface (I2C0) and
two GPIO/IRQ signals (PTE27 and PTE28). See Table 5 “Error! Reference source not found.” for
connection details.
When using Kinetis Bootloader to update K65 MCU flash firmware with an I2C interface, remove the
jumpers on J35 so I2C communication is not affected by the accelerometer connection. For information
on Kinetis Bootloader, see freescale.com/kboot.
Default: 1-2, 3-4
(Enable Accel Interrupts)
Default: 1-2, 3-4
(Enable Accel I2C)
ACC_SA0
ACC_BYP
ACCL_INT1
ACCL_INT2
PTE19 I2C0_SCL
PTE18 I2C0_SDA
PTE27
PTE28
ACCL_SCL
ACCL_SDA
V_BRD
V_BRD
P3V3
PTE[0..28]{4,5,6,7,8}
PTE[0..28] {4,5,6,7,8}
C44
0.1uF
10%
10V
C45
0.1uF
10%
10V
J35
HDR_2X2
1 2
3 4
R59
10K
DNP
C47
0.1uF
10%
10V
J22
HDR_2X2
1 2
3 4
R62
10K
5%
C46
4.7uF
10%
10V
U15
MMA8451Q
VDDIO 1
BYP
2
VDD 14
GND1
5
GND2
10
GND3
12
NC3 3
NC8 8
NC13 13
NC15 15
NC16 16
INT1 11
INT2 9
SCL
4
SDA
6
SA0
7
Figure 5. Accelerometer connection
3.10 Potentiometer, Pushbuttons, LEDs
The TWR-K65F180M features:
A potentiometer connected to an ADC input signal (ADC1_SE16/ADC0_SE22)
Two pushbutton switches (SW2 and SW3 connected to PTA4 and PTA10)
User controllable LEDs connected to GPIO signals
oYellow LED D6 connected to PTB4
oOrange LED D7 connected to PTB5
oLED D8 connected to PTA28
oLED D9 connected to PTA29

TWR-K65F180M User's Guide, Rev. 0,05/2015
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3.11 General Purpose Tower Plug-in (TWRPI) socket
The TWR-K65F180M features two sockets (J11 and J12) 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 the following table.
Table 3. TWRPI socket pin description
Left-side 2x10 Connector
Right-side 2x10 Connector
Pin
Description
Pin
Description
1
5V VCC
1
GND
2
3.3 V VCC
2
GND
3
GND
3
I2C: SCL
4
3.3 V 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/UART0_RX
18
ADC: TWRPI ID 1
18
GPIO: GPIO3/ UART0_TX
19
GND
19
GPIO: GPIO4/ UART0_CTS
20
Reset
20
GPIO: GPIO5/ UART0_RTS
3.12 Touch interface
The touch-sensing input (TSI) module of the Kinetis microcontrollers provides capacitive touch-sensing
detection with high sensitivity and enhanced robustness. Each TSI pin implements the capacitive
measurement of an electrode. There are two individual electrodes on-board the TWR-K65F180M that
simulates pushbuttons.

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TP_LED2R
PTB18 TSI0_CH11
BRD_PAD2BRD_PAD1
PTA28
PTB19 TSI0_CH12
TP_LED1R
TP_LED2RR
TP_LED1RR
PTA29
V_BRD V_BRD
PTB[0..23]{4,6,7,8}
PTA[0..31]{4,5,6,7,8}
R163 0
R1590
TP16
DNP
R64
1K
5%
R66
1K
5%
TP17
DNP
D8
LED_GRN + ELECTRODE
AC 1
R63
0
R164 0
D9
LED2_ELECTRODE
AC 1
Figure 6. Touch pad circuitry
3.13 USB interface
The K65FN2M0VMI18 features a high-, full-, and low-speed USB controller with on-chip HS USB
PHY, and a full-, low-speed USB controller with on-chip USB PHY. The TWR-K65F180M board
enables the USB to be host or device in standalone mode or with connection to a TWR-SER1 board in a
complete tower kit. FS USB controller DP/DM signals can be selectively routed to the MicroUSB
connector J15 or the MiniUSB connector J14 on a TWR-SER1 board by changing the 0 ohm resistor to
connect either to A or B as shown in the following schematic. This is to help reduce on-board signal
stub. The HS USB controller signal DP/DM signals can only be connected to on-board MicroUSB
connector J15.
default A
Place R188 very close to R190_B
USB HS
4} MCU_USB1_HS_DN{
{4} MCU_USB1_HS_DP
ELEV_USB_DN{8}
ELEV_USB_DP{8}
MCU_USB0_FS_DN {4}
MCU_USB0_FS_DP {4}
R1870
A B
R190
0
R1880
A B
R189
0
default A
Place R187 very close to R189_B
USB FS
Figure 7. USB signal routing
3.14 Secure digital card slot
A Micro SD card slot is available on the TWR-K65F180M connected to the SD host controller (SDHC)
signals of the MCU. This slot will accept standard format SD memory cards. See Table 5 “Error!
Reference source not found.” for connection details.