NXP Semiconductors TWR-K64F120M User manual

Freescale Semiconductor
User’s Guide
© 2014 Freescale Semiconductor, Inc. All rights reserved.
1 TWR-K64F120M
The TWR-K64F120M microcontroller module is designed
to work in either a standalone mode or as part of the
Freescale Tower System, a modular development platform
that enables rapid prototyping and tool reuse through
reconfigurable hardware. Take your design to the next level
and begin constructing your Tower System today by visiting
www.freescale.com/tower for additional Tower System
microcontroller modules and compatible peripherals. For
TWR-K64F120M-specific information and updates visit
www.freescale.com/TWR-K64F120M.
Doc Number: TWRK64F120MUG
Rev. B, 03/2014
Contents
1. TWR-K64F120M . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3. TWR-K64F120M Features . . . . . . . . . . . . . . . . . . . . . 2
4. Get to Know the TWR-K64F120M . . . . . . . . . . . . . . 3
5. Reference Documents . . . . . . . . . . . . . . . . . . . . . . . . . 4
6. Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . 4
7. Useful links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
TWR-K64F120M Tower Module
User’s Guide
by Freescale Semiconductor, Inc.

TWR-K64F120M Tower Module, Rev. B
2Freescale Semiconductor
Contents
2Contents
The TWR-K64F120M includes:
• TWR-K64F120M for board assembly
• Quick Start Guide
• USB A to mini-B cable for debug interface and power
• CR2032 coin cell battery for VBAT power supply
• USB A to micro-B cable for MK64FN1M0VMD12 USB interface
3 TWR-K64F120M Features
•Τower-compatible microcontroller module
• MK64FN1M0VMD12 MCU (120 MHz, 1024 KB Flash, 256 KB RAM, low power, 144
MAPBGA package)
• Dual-role USB interface with Micro-AB USB connector
• General purpose Tower Plugin (TWRPI) socket

TWR-K64F120M Tower Module, Rev. B
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Get to know the TWR-K64F120M
• On-board debug circuit: MK20DX128VM5 open (OpenSDA) with virtual serial port
• Three axis accelerometer (MMA8451Q)
• Four user controllable LEDs
• Two user pushbutton switches for GPIO interrupts
• One user pushbutton switch for MK64FN1M0VMD12 or MK20DX128VFM5 reset
• One Potentiometer
• Independent, battery-operated power supply for Real Time Clock (RTC) and tamper detection
modules
• SD card slot
4 Get to know the TWR-K64F120M
Figure 1. Front side of TWR-K64F120M module (TWRPI devices not shown)
VBAT Options
50 MHz OSC
Enable/Disable
Regulator
Option
Selector
General-purpose
TWRPI Plug-in
Accelerometer
K64 JTAG
SW1
1588
SW3
LEDs
VBAT Options
50 MHz OSC
Enable/Disable
Regulator Option
Selector
Board Power
Indicator
Potentiometer
K64 Micro-USB
RESET
OpenSDA
Debug
Power/OpenSDA
Mini-USB

TWR-K64F120M Tower Module, Rev. B
4Freescale Semiconductor
Reference Documents
Figure 2. Back side of TWR-K64F120M
5 Reference Documents
The documents listed below should be referenced for more information on the Kinetis family, Tower
System, and MCU Modules. These can be found in the documentation section of
http://www.freescale.com/kinetis
• TWR-K64F120M-SCH: Schematics
• TWR-K64F120M-PWA: Design Package
• K64P144M120SF5RM: Reference Manual
• Tower Configuration Tool
• Tower Mechanical Drawing
6 Hardware description
The TWR-K64F120M is a Tower MCU Module featuring the MK64FN1M0VMD12—a Kinetis
microcontroller in a 144 MAPBGA featuring a USB 2.0 full speed on-the-go (OTG) controller, a 10/100
Ethernet MAC with IEEE1588, hardware encryption, and tamper detection coupled with a secure real-time
clock on an independent battery supply. It is intended for use in the Freescale Tower System but can also
operate alone. The on-board OpenSDA debug circuit provides a Serial Debug interface and a power supply
input through a single mini-USB connector.
SD Card
Receptacle
Potentiometer
BatteryReceptacle

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Freescale Semiconductor 5
Hardware description
6.1 Block Diagram
The block diagram of the TWR-K64F120M board is presented in Figure 3:
Figure 3. Block diagram
6.2 Microntroller
The TWR-K64F120M features the MK64FN1M0VMD12 MCU. This 120 MHz microcontroller is part of
the Kinetis K6x family and is implemented in a 144 MAPBGA package. The following table notes some
of the features of the MK64FN1M0VMD12 MCU.
Table 1. Features of MK64FN1M0VMD12
Feature Description
Ultra low power – 11 low-power modes with power and clock gating for optimal peripheral activity and recovery
times.
– Full memory and analog operation down to 1.71 V for extended battery life
– Low-leakage wake-up unit with up to six internal modules and sixteen 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
Flash and SRAM – 1024KB flash featuring fast access times, high reliability, and four levels of security protection
– 256 KB of SRAM
– No user or system intervention to complete programming and erase functions and full operation
down to 1.71 V

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Hardware description
Mixed signal capability – High-speed 16-bit ADC with configurable resolution
– Single or differential output modes for improved noise rejection
– 500-ns conversion time achievable with programmable delay block
triggering
– Three high-speed comparators providing fast and accurate motor overcurrent
protection by driving PWMs to a safe state
– Optional analog voltage reference provides an accurate reference to
analog blocks
– Two 12-bit DACs
Performance – 120MHz ARM CortexM4 core with DSP instruction set, single cycle MAC, and single instruction
multiple data (SIMD) extensions
– Up to four channel DMA for peripheral and memory servicing with reduced CPU loading 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
Timing and Control – Four FlexTimers with a total of 12 channels
– Hardware dead-time insertion and quadrature decoding for motor control
– Carrier modulator timer for infrared waveform generation in remote control applications
– Four-channel 32-bit periodic interrupt timer provides time base for RTOS task scheduler or
trigger source for ADC conversion and programmable delay block
– One low power timer
– One independent real time clock
Connectivity and
Communications
– Full-Speed USB Device/Host/On-The-Go with device charge detect capability
– Optimized charging current/time for portable USB devices, enabling longer battery life
– USB low-voltage regulator supplies up to 120 mA off chip at 3.3 volts to power external
components from 5volt input
– Six UARTs:
One UART supports RS232 with flow control, RS485, and ISO7816
Five UARTs support RS232 with flow control and RS485
– One Inter-IC Sound (I2S) serial interface for audio system interfacing
– Three DSPI modules and two I2C modules
– One Ethernet module with 1588
– A multi-function external bus interface (FlexBUS) controller capable of interfacing to slave-only
devices.
– A secured digital host controller (SDHC)
– One FlexCAN module
Reliability, Safety and
Security
– Hardware Encryption co-processor for secure data transfer and storage. Faster than software
implementations and with minimal CPU loading. Supports a wide variety of algorithms - DES,
3DES, AES, MD5, SHA-1, SHA-256
– System security and tamper detection with secure real-time clock (RTC) and independent battery
supply. Secure key storage with internal/external tamper detection for unsecured flash,
temperature, clock, and supply voltage variations and physical attack detection
– Memory protection unit provides memory protection for all masters on the cross bar switch,
increasing software reliability
– Cyclic redundancy check (CRC) engine validates memory contents and communication data,
increasing system reliability
– Independently-clocked COP guards against clock skew or code runaway for fail-safe
applications such as the IEC 60730 safety standard for household appliances
– External watchdog monitor drives output pin to safe state for external components in the event
that a watchdog timeout occurs
– Included in Freescale’s product longevity
Table 1. Features of MK64FN1M0VMD12

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Hardware description
6.3 Clocking
The Kinetis MCUs start up from an internal digitally-controlled oscillator (DCO). Software can enable the
main external oscillator (EXTAL0/XTAL0) if desired. The external oscillator/resonator can range from
32.768 KHz up to a 50 MHz. A 50 MHz Oscillator is the default external source for the MCG oscillator
inputs (XTAL/EXTAL).
A 32.768 KHz crystal is connected to the RTC oscillator inputs by default.
By populating isolation resistors, other external clock sources for the MK64FN1M0VMD12 can be used,
including the CLKIN0 signal that can be provided by either pin B24 on primary TWR-ELEV or pin 20 of
TWRPI connector J3.
6.4 System Power
When installed into a Tower System, the TWR-K64F120M can be powered from either an on-board source
or from another source in the assembled Tower System.
In standalone operation, the main power source (5.0 V) for the TWR-K64F120M module is derived from
either the OpenSDA USB mini-B connector (J2) or the MK64FN1M0VMD12 USB micro-AB connector
(J17). Two low dropout regulators provide 3.3 V and 1.8 V supplies from the 5.0 V input voltage.
Additionally, the 3.3 V regulator built into the MK64FN1M0VMD12 MCU can be selected to power the
3.3 V bus. All the user selectable options can be configured using two headers, J18, J19, and J29. Refer to
sheet 4 and 5 of the TWR-K64F120M schematics for more details.
6.5 DryIce and RTC VBAT
The DryIce tamper detection module and the Real Time Clock (RTC) module on the
MK64FN1M0VMD12 have two modes of operation: system powerup and system powerdown. During
system powerdown, 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-K64F120M provides a battery
receptacle for a coin cell battery that can be used as the VBAT supply. The receptacle can accept common
20mm diameter 3 V lithium coin cell batteries.
6.6 Debug Interface
There are two debug interface options available: the on-board OpenSDA circuit and an external ARM
JTAG connector. The ARM JTAG connector (J5) is a standard 2x10pin connector, with one pin keyed, to
allow an external debugger access to the JTAG interface of the MK64FN1M0VMD12. Alternatively, the
on-board OpenSDA debug interface can be used to access the debug interface of the
MK64FN1M0VMD12.
6.7 OpenSDA
An on-board MK20DX128VFM5 based Open-Standard serial and debug adapter (OpenSDA) circuit
provides a JTAG debug interface to the MK64FN1M0VMD12. A standard USB A male to mini-B male
cable (provided) can be used for debugging via the USB connector (J2). The OpenSDA interface also
provides a USB to serial bridge. Drivers for the OpenSDA interface are provided in the P&E Micro

TWR-K64F120M Tower Module, Rev. B
8Freescale Semiconductor
Hardware description
OpenSDA Tower Toolkit. These drivers and more utilities can be found online at
http://www.pemicro.com/opensda.
6.8 Cortex Debug Connector
The Cortex Debug connector is a 20pin (0.05") connector providing access to the SWD, JTAG, EzPort
signals available on the K64 device. The pinout and K64 pin connections to the debug connector (J5) are
shown in the following table.
6.9 Accelerometer
An MMA8451Q digital accelerometer is connected to the MK64FN1M0VMD12 MCU through an I2C
interface (I2C1) and GPIO/IRQ signals (PTA6 and PTA8).
Table 2. Cortex Debug Connector
Pin Function TWR-K64F120M Connection
1 VTref 3.3 V MCU supply (MCU_PWR)
2TMS/SWDIO PTA3/JTAG_TMS/SWD_DIO/UART0_RTS/FTM0_CH0
3 GND Ground
4 TCK / SWCLK PTA0/JTAG_TCLK/SWD_CLK/EZP_CLK/UART0_CTS/UART0_COL/FTM0_CH5
5 GND Ground
6TDO/SWO PTA2/JTAG_TDO/TRACE_SWO/EZP_DO/UART0_TX/FTM0_CH7
7Key —
8TDI PTA1/JTAG_TDI/EZP_DI/UART0_RX/FTM0_CH6
9 GND Detect PTA4/LLWU_P3/NMI/EZP_CS/FTM0_CH1
10 nRESET RESET_b
11 Target Power 5 V supply (via J14)
12 TRACECLK PTA6/FTM0_CH3/CLKOUTB/TRACE_CLKOUT
13 Target Power 5 V supply (via J14)
14 TRACEDATA[0] PTA10/FTM2_CH0/MII0_RXD2/FTM2_QD_PHA/TRACE_D0
15 GND Ground
16 TRACEDATA[1] PTA9/FTM1_CH1/MII0_RXD3/FTM1_QD_PHB/TRACE_D1
17 GND Ground
18 TRACEDATA[2] PTA8/ADC0_SE11/FTM1_CH0/FTM1_QD_PHA/TRACE_D2
19 GND Ground
20 TRACEDATA[3] PTA7/ADC0_SE10/FTM0_CH4/TRACE_D3

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Hardware description
6.10 Potentiometer, Pushbuttons, LEDs
The TWR-K64F120M also features:
• A potentiometer connected to an ADC input signal (ADC1_SE18).
• Two pushbutton switches (SW1 and SW3 connected to PTC6 and PTA4, respectively)
• Four user controllable LEDs connected to GPIO signals (optionally isolated using jumpers):
— Yellow/Green LED (D5) to PTE6
— Yellow LED (D6) to PTE7
— Orange LED (D7) to PTE8
— Blue LED (D9) to PTE9
6.11 General Purpose Tower Plug-in (TWRPI) Socket
The TWR-K64F120M features a socket (J3 and J4) that can accept a variety of different Tower Plugin
modules featuring sensors, RF transceivers, and other peripherals. 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
J4 J3
Pin Description Pin Description
1 5 V VCC 1 GND
2 3.3 V VCC 2 GND
3GND 3I2C: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 UART: UART_RX or GPIO: GPIO2

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10 Freescale Semiconductor
Hardware description
6.12 USB
The MK64FN1M0VMD12 features a fullspeed/lowspeed USB module with OTG/Host/Device capability
and built-in transceiver. The TWR K64F120M routes the USB D+ and D signals from the
MK64FN1M0VMD12 MCU directly to the on-board microUSB connector (J17).
A power supply switch with an enable input signal and overcurrent flag output signal is used to supply
power to the USB connector when the MK64FN1M0VMD12 is operating in host mode. Port pin PTC8 is
connected to the flag output signal and port pin PTC9 is used to drive the enable signal. Both PTC8 and
PTC9 port pins can be isolated with jumpers (J23 and J26, respectively) if needed.
6.13 Secure Digital Card Slot
A Secure Digital (SD) card slot is available on the TWR-K64F120M connected to the SD Host Controller
(SDHC) signals of the MCU. This slot will accept standard format SD memory cards. See the following
table for the SDHC signal connection details.
18 ADC: TWRPI ID 1 18 UART: UART_TX or GPIO: GPIO3
19 GND 19 UART: UART_CTS or GPIO: GPIO4/Timer
20 Reset 20 UART: UART_RTS or GPIO: GPIO5/Timer
Table 4. SD Card Socket Connection
Pin Function TWR-K64F120M Connection
1 SDHC0_D3 PTE4/LLWU_P2/SPI1_PCS0/UART3_TX/SDHC0_D3/TRACE_D0
2 SDHC0_CMD PTE3/ADC0_DM2/ADC1_SE7A/SPI1_SIN/UART1_RTS/SDHC0_CMD/TRACE_D1/SPI1_S
OUT
3 VSS1 GND
4 VDD 3.3 V Board supply (V_BRD)
5 SDHC0_DCLK PTE2/LLWU_P1/ADC0_DP2/ADC1_SE6A/SPI1_SCK/UART1_CTS/SDHC0_DCLK/TRACE
_D2
6 VSS2 GND
7 SDHC0_D0 PTE1/LLWU_P0/ADC1_SE5A/SPI1_SOUT/UART1_RX/SDHC0_D0/TRACE_D3/I2C1_SCL/
SPI1_SIN
8 SDHC0_D1 PTE0/ADC1_SE4A/SPI1_PCS1/UART1_TX/SDHC0_D1/TRACE_CLKOUT/I2C1_SDA/RTC
_CLKOUT
9 SDHC0_D2 PTE5/SPI1_PCS2/UART3_RX/SDHC0_D2/FTM3_CH0
10 SD_CARD_DETECT PTB20/SPI2_PCS0/FB_AD31/CMP0_OUT
11 CD_WP_COMMON GND
12 SD_CARD_WP PTB21/SPI2_SCK/FB_AD30/CMP1_OUT
Table 3. General Purpose TWRPI Socket Pinout