NXP Semiconductors MC56F80000-EVKUM User manual

MC56F80000-EVKUM
MC56F80000-EVK Board User Manual
Rev. 1 — 14 December 2022 User manual
Document information
Information Content
Keywords MC56F80000-EVK, MC56F80748, MC56F80xxx
Abstract The NXP MC56F80000 Evaluation Kit board (MC56F80000-EVK) is a simple,
yet sophisticated design featuring the MC56F80748 digital signal controller
(DSC), a device that combines the processing power of a digital signal
processor (DSP) and the functionality of a microcontroller (MCU).

NXP Semiconductors MC56F80000-EVKUM
MC56F80000-EVK Board User Manual
1 Overview
The NXP MC56F80000 Evaluation Kit board (MC56F80000-EVK) is a simple, yet
sophisticated design featuring the MC56F80748 digital signal controller (DSC), a
device that combines the processing power of a digital signal processor (DSP) and the
functionality of a microcontroller (MCU).
The MC56F80xxx device family is based on a 32-bit 56800EF core with:
•Up to 100 MIPS at 100 MHz core frequency
•DSP and MCU functionality in a unified C-efficient architecture
•Enhanced single-precision floating-point unit (eFPU)
•Coordinate rotation digital computer (CORDIC) engine
MC56F80748 has 64 kB on-chip Flash memory and 8 kB on-chip RAM.
The MC56F80000-EVK board features OpenSDA, which provides an onboard debugger
(consider it as an on-chip Multilink debugger) and a virtual serial port for rapid prototyping
and product development. On MC56F80000-EVK, the OpenSDA MCU is a Kinetis K
Series K26 family device, MK26FN2M0VMI18.
The MC56F80000-EVK hardware is form-factor compatible with the Arduino™ R3 pin
layout, providing a broad range of expansion board options. The onboard interface
includes a 3-axis MEMS accelerometer, PWM and user LEDs, buttons, ADC test circuits,
OPAMP test circuits, and external serial flash memory.
This document provides detailed information about the MC56F80000-EVK board
interfaces, power supplies, clocks, LEDs, and other interfaces.
1.1 Acronyms
The table below lists and explains the acronyms and abbreviations used in this
document.
Term Description
ADC Analog-to-digital converter
CLK Clock
CMP Comparator
DIO Data input/output
DNP Do not populate
DSC Digital signal controller
DSP Digital signal processor
GPIO General-purpose input/output
JTAG Joint test access group
LDO Low dropout
LPI2C Low-power inter-integrated circuit (LPI2C)
MCU Microcontroller unit
MEMS Microelectromechanical system
NTC Negative temperature coefficient
Table 1. Acronyms and abbreviations
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Term Description
OPAMP Operational amplifier
OpenSDA Open-standard serial and debug adapter
PGA Programmable gain amplifier
PWM Pulse width modulation
QSPI Quadruple serial peripheral interface
SDK Software development kit
SPI Serial peripheral interface
SWD Serial wire debug
UART Universal asynchronous receiver transmitter
USB Universal serial bus
Table 1. Acronyms and abbreviations...continued
1.2 Related documentation
The table below lists and explains the additional documents and resources that you
can refer to for more information on MC56F80000-EVK. Some of the documents listed
below may be available only under a non-disclosure agreement (NDA). To request
access to these documents, contact your local field applications engineer (FAE) or sales
representative.
Document Description Link/how to access
MC56F80xxx Reference
Manual
Intended for system software
and hardware developers and
applications programmers who
want to develop products with
this device.
MC56F80XXXRM
MC56F80xxx Data Sheet Provides information about
electrical characteristics,
hardware design
considerations, and ordering
information
MC56F80XXX
MCUXpresso Software
Development Kit (SDK)
documentation
The MCUXpresso SDK is
a comprehensive software
enablement package designed
to simplify and accelerate
application development with
NXP MCUs
mcuxpresso.nxp.com
K26 Sub-Family Reference
Manual
Intended for system software
and hardware developers and
applications programmers who
want to develop products with
this device.
K26P169M180SF5RM
Table 2. Related documentation
1.3 Board kit contents
The table below lists the items included in the MC56F80000-EVK kit.
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Item Quantity
MC56F80000-EVK board hardware assembly 1
USB Type A to micro USB Type B cable, 1 m 1
MC56F80000-EVK Quick Start Guide 1
Table 3. Hardware kit contents
1.4 Block diagram
The figure below shows the MC56F80000-EVK block diagram.
DSC
PWM
ADC
LPI2C
OPAMP
GPIO
Arduino Header3
Arduino Header1
Arduino Header4
Arduino Header2
SPI
JTAG
MICRO
USB
K26
OpenSDA
1117
(3.3V LDO)
P5V0_OSDA_OUT
VDD(3V3)
SCI0
FXLS8974CFR3
3-axis e-compass
PWM with RC filter
Resistor Divider x3
User LEDs x3
Mechanical Buttons x4
8MHz
PWM LEDs x6
SPI
Flash
(5V)
EXTERNAL
Level
Shifter
(5V) USB
CMP
External sampling signal
SCI1
CP2102
MICRO
USB
DNP
Figure 1. MC56F80000-EVK block diagram
1.5 Board pictures
The following figure shows the top-side view of MC56F80000-EVK.
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MC56F80748 DSC
Figure 2. MC56F80000-EVK top view
The following figure shows the onboard connectors on MC56F80000-EVK.
J1
I/O header
J2
I/O header
J3
I/O header
J4
I/O header
J7
Power adapter
(5 V only)
J12
OpenSDA USB virtual serial port
/ onboard debugger
/ external 5 V power connector
J10
JTAG connector
for MC56F80748
J14
OpenSDA/K26
JTAG
J26
USB virtual serial port (CP210x)
/ external 5 V power connector
Note: The CP210x is DNP by default, therefore, the virtual serial port function is not available by default through J26.
Figure 3. MC56F80000-EVK jumpers and connectors
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The following figure shows the Jumpers, LEDs, and push buttons on MC56F80000-EVK.
J22
J21
SW1
SW3 SW2
SW5
SW4
J11
J18
J17
J9 J8
J13 J5 J6 J16 J19 J24
J20
J25
J23
D14
D13
D12
D11
D10
D9
D8
D7
D5
D2 J15
Figure 4. MC56F80000-EVK jumpers, LEDs, and push buttons
.
1.6 Board features
The following table lists the features of MC56F80000-EVK. Figure 2 shows different
components of MC56F80000-EVK.
MC56F80000-EVK
feature
Processor feature used Description
MC56F80748 DSC The processor is based on 32-bit 56800EF core of up to 100
MIPS at 100 MHz core frequency
Note: For details on the MC56F80748 DSC, refer to MC56F80
XXX Reference Manual.
Power supply •5 V input power supply from any of the following:
–External DC power supply connector (J7)
–I/O header (J3)
–OpenSDA USB micro-AB connector (J12)
–USB micro-AB connector (J26)
•Jumpers J8 and J9 are used for 5 V power source selection
•LD1117 LDO for 3.3 V VDD supply
Clock •8 MHz crystal clock for MC56F80748
•16 MHz crystal clock for MK26FN2M0VMI18
Table 4. MC56F80000-EVK features
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MC56F80000-EVK
feature
Processor feature used Description
3-axis low-g accelerometer Low-power inter-integrated
circuit (LPI2C) module
•Supports NXP FXLS8974CF accelerometer for motion
sensing
•Device supports both high-performance and low-power
operating modes
x3 resistor divider High-speed analog-to-digital
converter (ADC)
•Three resistor dividers circuits are used on the MC56F80000-
EVK board to test the ADC block functions
•One negative temperature coefficients (NTC) thermistor
(NCP18XH103F03RB) supporting temperature from 90 °C to
-20 °C
Debug •Onboard serial and debug adapter (OpenSDA) circuit
–Provides a debug circuit for MC56F80748 through USB
connector J12 when all the four jumpers in J13 are
connected
–Supports a JTAG/SWD connector (J14) to program and
debug OpenSDA MCU MK26FN2M0VMI18
–Provides a virtual serial port through USB connector (J12),
which uses QSCI0 in MC56F80748
•USB-to-UART device (CP2102N) (Not populated by default)
–Provides a virtual serial port through USB connector (J26),
which uses QSCI1 in MC56F80748
•JTAG connector (J10) to program and debug MC56F80748,
when all the four jumpers in J13 are disconnected
Mechanical buttons GPIO Five Tactile switches (SW[1:5]) as push buttons. SW1 is the
reset button. (See Section 1.7)
I/O headers Headers compatible with:
•Arduino shields
LED •Supports six LEDs controlled by 6 PWM channels
•Supports three user-defined LEDs
PCB MC56F80000-EVK: 107.6 mm X 53.4 mm, 4 layer
Orderable part number MC56F80000-EVK
Table 4. MC56F80000-EVK features...continued
1.7 Push-button switches
Five push buttons are supported on the MC56F80000-EVK using the Tactile switches
(TL1015AF160QG).
The following table explains the onboard push buttons. Figure 4 shows the push buttons
locations on the MC56F80000-EVK board.
Part
identifier
Switch
type
Description
SW1 Push
button
When pressed, resets the MC56F80748 MCU.
Note: The MCU can also be reset using the JTAG connector (J10) or by the reset signal from
OpenSDA circuitry.
SW2 Push
button
SW2 connects to GPIOE6 when jumper J17 is shorted. Pressing SW2 gives a low level on
GPIOE6, otherwise, it is a high level on GPIOE6.
Table 5. Push buttons
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Part
identifier
Switch
type
Description
SW3 Push
button
SW3 connects to GPIOE7 when jumper J18 is shorted. Pressing SW3 gives a low level on
GPIOE7, otherwise, it is a high level on GPIOE7.
SW4 Push
button
SW4 connects to GPIOF8 when jumper J21 is shorted. Pressing SW4 gives a low level on
GPIOF8, otherwise, it is a high level on GPIOF8.
SW5 Push
button
SW5 connects to GPIOC13 when jumper J22 is shorted. Pressing SW4 gives a low level on
GPIOC13, otherwise, it is a high level on GPIOC13.
Table 5. Push buttons...continued
1.8 Connectors
Connectors are onboard devices that allow to connect external devices to the board.
Figure 3 shows the MC56F80000-EVK connectors. The table below describes the
connectors.
Part
identifier
Connector type Description Reference section
J1 2x8 connector
J2 2x10 connector
J3 2x8 connector
J4 2x6 connector
I/O headers compatible with the Arduino shields Section 2.9
J7 DC power jack For 5 V input power supply to the board; connects to 5
V power adapter.
Section 2.1.1
J10 2x7 connector JTAG connector to program and debug the MC56
F80748.
Note: Remove four jumpers on J13 when this JTAG
connector is used. This is to avoid the impact of
onboard OpenSDA circuit.
Section 2.12.1
J12 USB 2.0 micro-AB
connector
OpenSDA USB port, and external 5 V power connector.
Used for virtual serial communication and to debug/
program MC56F80748.
Section 2.8
J14 2x5 connector K26 (OpenSDA) JTAG/SWD connector. Provides debug
interface to program and debug MK26FN2M0VMI18.
See board schematic
J26 USB 2.0 micro-AB
connector
USB connector for USB-to-UART CP210x device,
which provides a virtual serial port. Also, used as an
external 5 V power connector.
Note:
CP210x USB-to-UART bridge VCP drivers are needed.
CP210x is not populated by default on the board.
Section 2.11
Table 6. MC56F80000-EVK connectors
1.9 Jumpers
Jumpers (or shorting headers) are small connectors that allow to choose from two or
more options available. Figure 3 highlights the MC56F80000-EVK jumpers available for
use. The following table describes the jumpers available on MC56F80000-EVK.
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Part
identifier
Jumper
type
Description Jumper settings
J5 1x2-pin
header
VDD Shorted pin 1-2 (default setting): Connect VDD to DSC digital power
supply VDD_MCU
J6 1x2-pin
header
VDDA Shorted pin 1-2 (default setting): Connect VDDA to DSC analog power
supply VDDA_MCU
J8, J9 1x3-pin
header
1x1-pin
header
5 V power source
selection
•Shorted J8 (pin 1-2): P5V_DC_IN (5 V) input power supply is from I/
O header (J3, pin 16)
•Shorted J8 (pin 2-3) (default setting): 5 V input power source is either
P5V0_OSDA_OUT power supply from OpenSDA USB connector
(J12) or P5V_USB2 power supply from USB connector (J26)
•Shorted J8 (pin2) and J9 (pin1): 5 V input power source is DC jack J7
J11 1x3-pin
header
Reset selection •Shorted pin 1-2: Manual reset signal after pressing switch SW1 is
controlled through the OpenSDA microcontroller MK26FN2M0VMI18
using the NTSX2102GU8H dual-supply translating transceiver.
Use this setting only when OpenSDA MCU MK26FN2M0VMI18
is powered and has been programmed with a correct OpenSDA
firmware
•Shorted pin 2-3 (default setting): Manual reset signal after pressing
switch SW1 is routed to MC56F80748 directly.
J13 2x4-pin
header
DSC JTAG signal
connectors between
MC56F80748 and
OpenSDA circuit
•Shorted pin 1-2 (default setting): Connect OpenSDA circuit with
MC56F80748 GPIOD2 (TCK signal)
•Shorted pin 3-4 (default setting): Connect OpenSDA circuit with
MC56F80748 GPIOD3 (TMS signal)
•Shorted pin 5-6 (default setting): Connect OpenSDA circuit with
MC56F80748 GPIOD0 (TDI signal)
•Shorted pin 7-8 (default setting): Connect OpenSDA circuit with
MC56F80748 GPIOD1 (TDO signal)
J15 1x3-pin
header
OPAMP test •Shorted pin 1-2: Configure the internal OPAMP to work at PGA mode
•Shorted pin 2-3 (default setting): Configure the internal OPAMP to
work at OPAMP mode
J16 1x2-pin
header
OPAMP test •Open: Configure the internal OPAMP to work at PGA mode
•Shorted (default setting): Configure the internal OPAMP to work at
OPAMP mode
J17 1x2-pin
header
SW2 •Open (default setting): Disconnect SW2 button from MC56F80748
GPIOE6
•Shorted: Connect SW2 button to MC56F80748 GPIOE6
J18 1x2-pin
header
SW3 •Open (default setting): Disconnect SW3 button from MC56F80748
GPIOE7
•Shorted: Connect SW3 button to MC56F80748 GPIOE7
J19 1x2-pin
header
OPAMP/ADC/CMP
test with filtered
PWM output
•Open: Disconnect the GPIOE6 (PWMA_3B) from the RC filter
•Shorted (default setting): Connect the GPIOE6 (PWMA_3B) with the
RC filter
J20 1x2-pin
header
Current sensing •Open (default setting): Use external OPAMP from FRDM-MC-
LVPMSM board for motor phase A current sensing
•Shorted: Use DSC internal OPAMP for motor phase A current
sensing
Table 7. MC56F80000-EVK jumpers
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Part
identifier
Jumper
type
Description Jumper settings
J21 1x2-pin
header
SW4 •Open: Disconnect SW4 button from MC56F80748 GPIOF8
•Shorted (default setting): Connect SW4 button to MC56F80748
GPIOF8
J22 1x2-pin
header
SW5 •Open: Disconnect SW5 button from MC56F80748 GPIOC13
•Shorted (default setting): Connect SW5 button to MC56F80748
GPIOC13
J23 1x2-pin
header
Current sensing •Open (default setting): Use external OPAMP from FRDM-MC-
LVPMSM board for motor phase A current sensing
•Shorted: Use DSC internal OPAMP for motor phase A current
sensing
J24 1x3-pin
header
Current sensing •Shorted pin 1-2 (default setting): Use external OPAMP from FRDM-
MC-LVPMSM board for motor phase A current sensing
•Shorted pin 2-3: Use DSC internal OPAMP for motor phase A current
sensing
J25 1x3-pin
header
Current sensing •Shorted pin 1-2 (default setting): Use external OPAMP from FRDM-
MC-LVPMSM board for motor phase B current sensing
•Shorted pin 2-3: Use DSC internal OPAMP for motor phase B current
sensing
Table 7. MC56F80000-EVK jumpers...continued
1.10 LEDs
MC56F80000-EVK has light-emitting diodes (LEDs) to monitor system functions, such
as power-on, reset, board faults, and so on. The information collected from LEDs can be
used for debugging purposes.
LEDs are highlighted in Figure 4. The table below describes the MC56F80000-EVK
LEDs.
Part identifier LED color LED name Description (When LED in ON)
D2 Green Power Indicates that VDD (3.3 V) supply is available and the MC56
F80000-EVK board is powered up.
D3 Red Reset Indicates that the MC56F80748 device is under reset.
D4 Orange OpenSDA power Indicates that the OpenSDA microcontroller MK26FN2M0
VMI18 is powered up and has been programmed with an
OpenSDA firmware.
D5 Red User LED1 User-programmable LED connected with GPIOF6. A low
level turns on the LED.
D7 Blue User LED2 User-programmable LED connected with GPIOF4. A low
level turns on the LED.
D8 Yellow User LED3 User-programmable LED connected with GPIOF5. A low
level turns on the LED.
D9 Yellow/Green PWM LED0 Indicates that GPIOE0/PWMA_0B function is enabled and
PWM signal is outputted
D10 Yellow PWM LED1 Indicates that GPIOE1/PWMA_0A function is enabled and
PWM signal is outputted. A high level turns on the LED.
Table 8. MC56F80000-EVK LEDs
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Part identifier LED color LED name Description (When LED in ON)
D11 Yellow/Green PWM LED2 Indicates that GPIOE2/PWMA_1B function is enabled and
PWM signal is outputted. A high level turns on the LED.
D12 Yellow PWM LED3 Indicates that GPIOE3/PWMA_1A function is enabled and
PWM signal is outputted. A high level turns on the LED.
D13 Yellow/Green PWM LED4 Indicates that GPIOE4/PWMA_2B function is enabled and
PWM signal is outputted. A high level turns on the LED.
D14 Yellow PWM LED5 Indicates that GPIOE5/PWMA_2A function is enabled and
PWM signal is outputted. A high level turns on the LED.
Table 8. MC56F80000-EVK LEDs...continued
2 MC56F80000-EVK functional description
This chapter describes the features and functions of MC56F80000-EVK. For details of
the MC56F80748 MCU features, see MC56F80xxx Reference Manual.
2.1 Power supplies
The MC56F80000-EVK board can be powered with 5 V power supply using one of the
following source options:
•External DC power supply adapter (J7)
•OpenSDA USB micro-AB connector (J12)
•I/O header (J3, pin 6)
•CP2102 USB micro-AB connector (J26)
The following figure shows the 5 V power source selection circuit diagram.
5 V POWER
SOURCE SELECTION
Power On
3V3
P5V_DC_IN
P5V
VDD
P5V0_OSDA_OUT
P5V_USB2
J9
HDR_1X1
1
U2
LD1117-3.3
GND 1
VOUT 2
IN
3TAB_VOUT
4
D15
MBR120VLSFT1G
AC
D2
GREEN
A
C
J8
HDR_1X3
JUMPER DEFAULT = 2-3
1
2
3
J7
CON_1_PWR
1
2
3
C19
10 µF
D16
MBR120VLSFT1G
AC
C21
10 µF
C20
0.1 µF
C22
0.1 µF
TP3
R15
1K
P5V_REG_IN
PW R_ IN
P5V_TRG_USB
5 V INPUT
Center Positive
Figure 5. 5 V power source selection
Jumpers J8 and J9 are used for 5 V input power source (P5V) selection purpose. For J8
and J9 detail, see Section 1.9.
P5V is then converted into 3.3 V (VDD) for DSC, SPI Flash, 3-axis low-g
accelerometer, and Arduino header. Especially, P5V0_OSDA is converted into 3.3 V
(P3V3_VREG_OUT) with a regulator inside MK26FN2M0VMI18 to power OpenSDA
circuits.
2.1.1 5 V power sources
The following table describes the 5 V input power sources and their output power
supplies.
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Part identifier Device/Power source Output power supply Description
J7 5 V DC power jack PWR_IN
J12 OpenSDA micro-
AB USB connector
providing 5 V power
supply
P5V0_OSDA •Source of P5V0_OSDA_OUT
•Supplies power to the power switch, MIC2005-0.
8YM6 (U11)
•USB regulator input power supply for OpenSDA
microcontroller (MK26FN2M0VMI18)
U11 MIC2005-0.8YM6
(Microchip Technology)
P5V0_OSDA_OUT[1] See Figure 6
•Power supply for P5V_REG_IN supply
J3 2x8-pin Arduino power
header provides 5 V
input power supply
through pin 16
P5V_DC_IN One of the sources for P5V_REG_IN
J26 CP2102 Micro-AB USB
connector providing 5 V
power supply
P5V_USB2 One of the sources for P5V_REG_IN
- From P5V_REG_IN P5V •Power supply for voltage regulator, LD1117 (U2)
•5 V power supply for pin 12 of 2x8-pin Arduino
power header (J3)
Table 9. 5 V power sources
[1] P5V0_OSDA_OUT is only available from P5V0_OSDA when USB cable is connected to J12, and a correct OpenSDA firmware has been programmed
into MK26FN2M0VMI18 (A correct OpenSDA firmware is programmed into MK26FN2M0VMI18 during MC56F80000-EVK manufacturing).
The following figure shows the power switch circuit diagram.
ACTIVE HIGH
P5V0_OSDA P5V0_OSDA_OUT P3V3_VREG_OUT
R69
10K
DNP
C60
1.0 µF
R79
13.7K
R63
0
DNP0603
C62
100 pF
C64
0.22 µF
TP14
TPAD
TP15
TPAD
R70
0
0603
R77 1.0K
C61
0.22 µF
C63
1.0 µF
R71
10K
U11
MIC2005-0.8YM6
VOUT 6
CSLEW
5
ENABLE
3GND 2
VIN
1
FAULT 4
MIC2005_CSLEW
VTRG_FAULT_B
POWER_EN POWER_EN_R
Figure 6. Power switch circuit diagram
2.1.2 3.3 V power distribution
The table below describes the 3.3 V power nodes on MC56F80000-EVK board.
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Part
identifier
Device Power supply
voltage
Description
U2 LD1117 VDD (3.3 V) •Source of VDD_MCU and VDDA
•Power supply for voltage level translators, NTSX2102GU8H (U5),
74LVC1T45GW (U7, U8, U9, U10), and NTSX2102GU8H (U12)
•Power supply for FXLS8974CF accelerometer
•Power supply for MX25L512E SPI Flash
•Power supply for buttons and user-defined and PWM LEDs
•Power supply for pins 6 and 10 of Arduino power header (J3) and
pull-up resistors on pins 20 and 18 of Arduino header (J2)
J5 2-pin header VDD_MCU •Power supply for digital circuits of MC56F80748
L1 Magnetic bead VDDA •Source of VDDA_MCU
•Power supply for Resistor Divider circuit
J6 2-pin header VDDA_MCU •Power supply for analog circuits of MC56F80748
•Power supply for AREF (reference voltage for Arduino header J2)
U4 MK26FN2M0VMI18 P3V3_VREG_
OUT
•Regulator output voltage of MK26FN2M0VMI18
•Power supply for OpenSDA circuit
•Power supply for OpenSDA JTAG/SWD connector (J14)
•Power supply for voltage level translators, NTSX2102GU8H (U5),
74LVC1T45GW (U7, U8, U9, U10), NTSX2102GU8H (U12)
Table 10. 3.3 V power nodes on MC56F80000-EVK
The following figure shows the VDD circuit diagram.
VDD
VDD_MCU
VDDA
VDDA_MCU
C16
0.1 µF
L1 600 OHM
1
2
C17
10 µF
TP2
J5
HDR 1X2
JUMPER DEFAULT = 1-2
1 2
TP4
J6
HDR 1X2
JUMPER DEFAULT = 1-2
1
2
C18
0.1 µF
R16 0
Figure 7. VDD circuit diagram
2.2 Clocking
The table below provides details of different clocks of the MC56F80000-EVK board.
Clock generator Clock specifications Destination
Crystal oscillator, Y1 Frequency: 8 MHz MC56F80748 MCU:
•EXTAL on MC56F80748 pin 3 (GPIOC0/EXTAL/CLKIN0)
•XTAL on MC56F80748 pin 4 (GPIOC1/XTAL)
Crystal oscillator, Y2 Frequency: 16 MHz OpenSDA MCU MK26FN2M0VMI18:
•EXTAL0 on MK26FN2M0VMI18 pin N13 (PTA18/EXTAL0/FT
M0_FLT2/FTM_CLKIN0/TPM_CLKIN0)
•XTAL0 on MK26FN2M0VMI18 pin M13 (PTA19/XTAL0/FTM1_
FLT0/FTM_CLKIN1/LPTMR0_ALT1/TPM_CLKIN1)
Table 11. MC56F80000-EVK clocks
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2.3 3-axis digital sensor
The MC56F80000-EVK board supports motion sensing using NXP FXLS8974CFR3
accelerometer. FXLS8974CFR3 is a compact 3-axis MEMS accelerometer designed for
use in applications that require ultra-low-power wake-up on motion.
FXLS8974CFR3 is connected to MC56F80748 through I2C interface, LPI2C. The
INTF_SEL pin of FXLS8974CFR3 has been connected to GND, so that I2C interface
mode is selected for this device.
The SA0 pin of the FXLS8974CFR3 device selects the least significant bit of its I2C
secondary address (device address). SA0 is set to 0 by default, remove R101 to set SA0
to 1.
•When SA0 = 0, the I2C address (7-bit format) of the FXLS8974CFR3 device is set to
18h (default)
•When SA0 = 1, the I2C address (7-bit format) of the FXLS8974CFR3 device is set to
19h
Since the BT_MODE pin of the device is connected to GND, default operation mode is
enabled. For more information, refer to FXLS8974CF data sheet.
The following figure shows the accelerometer circuit diagram.
VDD
VDD
VDD
VDD
C66
0.1 µF
R101 0
R160 0
R100 0
DNP
R152 0
C65
4.7 µF
R92 0
FXLS8974CFR3
U18
BT_MODE
2
SCL/SCLK
5
INTF_SEL
9
SPI_CS/WAKE_UP
7
SA0/SPI_MISO 3
SDA/SPI_MOSI/SPI_DATA 4
INT1/MOT_DET 8
INT2/EXT_TRIG/BOOT_OUT 6
VDD 1
GND
10
R98
10K
C67
0.1 µF
R159 0
DNP
R93 0
R87
10K
DNP
R85
4.7K
R86
10K
DNP
R89 0
R84
4.7K
GF3
GF8
GF2
GF6
GC13
INT1_COMBO
INT2_COMBO
WAKE_UP
LP_SCL0 LP_SDA0
Figure 8. Accelerometer circuit diagram
FXLS8974CFR3 pin/signal MC56F80748 pin Description
SCL/SCLK GPIOF3 (LP_SCL0) I2C serial clock
SDA GPIOF2 (LP_SDA0) I2C serial data
INT1/MOT_DET GPIOF6 (INT1_COMBO) Mode-dependent multifunction I/O pin 1. For more detail,
refer to FXLS8974CF data sheet.
INT2/EXT_TRIG/BOOT_OUT GPIOC13 (INT2_COMBO)
(disconnected from GPIOC13
by default)
Mode-dependent multifunction I/O pin 2. For more detail,
refer to FXLS8974CF data sheet.
Table 12. FXLS8974CFR3 pin connections
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2.4 SPI Flash interface
The MC56F80748 supports one queued serial peripheral interface (QSPI) controller that
provides:
•Maximum of 25 Mbit/s baud rate
•Full-duplex operation
•Master and slave modes
The QSPI controller signals are multiplexed with the GPIO (Group C) pin signals.
On the MC56F80000-EVK board, QSPI controller connects to the 512 kbit Macromix
MX25L512E Flash memory. The MX25L512E memory features a serial peripheral
interface and the protocol that uses three bus signals: clock input (SCLK), serial data
input (SI), and serial data output (SO). Serial access to the device is enabled by CS
input.
The following figure shows the SPI Flash interface circuit diagram.
MOSI 0 MISO 0
SCK0
SS0
VDD
VDD
U13
MX25L512E
CS
1
SO/SIO1 2
WP
3
GND
4
SI/SIO0
5
SCLK
6
HOLD
7
VCC 8
EP
9
C69
0.1 µF
R95
10K
R136 0
R134 0
R135 0
R133 0
R97
10K
GC10
GC9
GC7
GC8
Figure 9. SPI Flash interface circuit diagram
The following table describes the MX25L512E SPI Flash pin connection with the QSPI
controller of the MC56F80748.
MX25L512E pin/signal MC56F80748 pin Description
SI/SIO0 GPIOC10 (MOSI0) Master-out Slave-in
SO/SIO1 GPIOC8 (MISO0) Master-in slave-out
SCLK GPIOC9 (SCK0) Serial clock
CS GPIOC7 (SS0) Chip select
Table 13. MX25L512E SPI Flash pin connection
2.5 Resistor dividers
The three resistor dividers circuits are used on the MC56F80000-EVK board to test the
ADC block functions.
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•Resistor divider circuit 1
–Thermistor RT1 is between THER_A and THER_B
–Supports temperature from 90 °C to -20 °C
–THER_A is connected to the GPIOA6 (ANA6) pin of MC56F80748
–THER_B is connected to the GPIOA7 (ANA7) pin of MC56F80748
–Voltage between THER_A and THER_B can vary from 0.372 V to 2.879 V depending
on the temperature
•Resistor divider circuit 2
–Is used to test the ANA4/ANB4 Expansion Mux of ADC control block of MC56F80748
–Is connected to the GPIOC5 (ANB4d) pin of MC56F80748
–Is connected to the GPIOF7 (ANA4f) pin of MC56F80748
•Resistor divider circuit 3
–Is used to test the ANA4/ANB4 Expansion Mux of ADC control block of MC56F80748
–Is connected to the GPIOC14 (ANB4c) pin of MC56F80748
–Is connected to the GPIOC15 (ANA4c) pin of MC56F80748
2.6 PWM interface
The filtered PWM circuit on the MC56F80000-EVK is provided to test the function of the
OPAMP, CMP, and ADC blocks of the processor.
OPAMP test with filtered PWM output
J19
HDR 1X2
JUMPER DEFAULT = 1-2
1 2
C76
0.1 µF
J15
HDR_1X3
JUMPER DEFAULT = 2-3
1
2
3
TP17
R108
2.0K
R110
10K
R109
1.0K
TP18
TP16
J16
HDR 1X2
JUMPER DEFAULT = 1-2
1 2
GB6
GE6GB7
GC4
GA1
OPA_IN0
GE6 / PWMA_3B
ANVP
CMPB_IN1
OPA_OUT
Figure 10. OPAMP, CMP, and ADC blocks test schematic diagram
The GPIOE6 (PWMA_3B) output is connected with GPIOB7 and GPIOB6 through RC
filter circuit. The filtered PWM signal can be connected with GPIOA1 (OPAMPA_IN0)
directly or through resistor R108 depending on jumper J15. The resistor R109, which
is in between GPIOA1 (OPAMPA_IN0) and GPIOC4 (OPAMPA_OUT), can be used as
OPAMP feedback resistor, if GPIOA1 is configured as OPAMP inverting input.
The following configurations can be used to test the function of the ADC, CMP, and
OPAMP on this circuit.
• CMP/ADC test configuration
–The GPIOE6 (PWMA_3B) can be configured to output a PWM signal. The cut-off
frequency of the low-pass RC filter is 160 Hz. When the frequency of the PWM
signal is much higher than the cut-off frequency, the output signal of the RC filter
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is a DC signal, which can be used as ADC/CMP input signal through GPIOB6
(ANB6+CMPB_IN1) and GPIOB7 (ANB7+CMPB_IN2).
• OPAMP test configuration
–PGA mode test
When the pin 1 and pin 2 of J15 are connected, J16 is unconnected and J19
is connected, the PGA mode for OPAMP can be tested. The circuit is shown in
Figure 11. The low frequency PWM signal from GPIOE6 is filtered as DC signal
through the RC filter, the voltage of the DC signal is D*Vdd, where D is the duty cycle
of the PWM signal and Vdd is the voltage of the DSC power supply. The OPAMP
must be configured to work at PGA mode, so the output of the OPAMP should be
Gain*D*Vdd. You can select the gain through OPAMP register configuration. GPIOA1
must be configured as OPAMP non-inverting input in this case.
OPAMPOPAMP
GC4
GA1
OPA_OUT
-
+
GE
6
/
PWMA_
3
B
GB6/
GB
7
D*Vdd
v
OPA_OUT=Gain*D*Vdd
C76
Gain
X2
X4
X8
X16
OPAMP
GC4
GA1
OPA_OUT
-
+
GE
6
/
PWMA_
3
B
GB6/
GB
7
D*Vdd
v
OPA_OUT=Gain*D*Vdd
C76
Gain
X2
X4
X8
X16
Figure 11. OPAMP working in PGA mode
–OPAMP mode test
When the pin 2 and pin 3 of J15 are connected, J16 and J19 are both connected,
and GPIOA1 is configured as inverting input, the OPAMP mode for OPAMP can be
tested. You can modify the gain of the OPAMP circuit by changing the value of the
external resistors.
The equivalent circuit is shown in Figure 12.
Note: The VR which is connected with the non-inverting input of the OPAMP
is a DSC internal 1.2 V voltage reference, which is selected through OPAMP
configuration registers.
OPAMP
VR
R108
R109
GC4
GA1
GE6/
PWMA_3B
OPA_OUT
-
+
GB6/GB7
v-
v+
C76
R110
Figure 12. OPAMP working in OPAMP mode
Since the capacitor C76 filters all the AC component of the PWM signal and has
no impact on the DC component, the equivalent circuit can be obtained as shown
in Figure 13. The capacitor is removed and the PWM input signal is seen as its DC
component. And the OPAMP works at OPAMP mode, you can calculate the output of
the OPAMP based on the formula in the following figure.
v
OPA_OUT
=VR(1+
R109/(R108+
R110))-
D*V
dd
*R109/(
R108+
R110)
OPAMP
VR
R108
R109
GC4
GA1
D*V
dd
OPA_OUT
-
+
GB6/GB7
v-
v+
R110
Figure 13. Equivalent circuit for OPAMP working in OPAMP mode
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2.7 OPAMP test circuit
The OPAMP test circuit is designed to use the DSC internal OPAMPs together with the
phase current sensing circuit of motor power stage board (FRDM-MC-LVPMSM). The
FRDM-MC-LVPMSM board is connected with the EVK board through Arduino interface.
You can select to use the external OPAMPs on FRDM-MC-LVPMSM or DSC internal
OPAMPs for current sensing by configuring the jumpers.
The following figure shows the schematic diagram of the OPAMP test circuit.
OPB_N
OPA_P
OPAMP tes t with m otor control
board for CUR_A & CUR_B
ADC_MID
ADC_MID
GA1_OPA_P
GB1_OPB_P
GA0_IN
GB0_IN
R141 0
DNP
R122 10K
R140 0
DNP
R1171.0K
J23
HDR 1X2
1 2
J20
HDR 1X2
1 2
J25
HDR_1X3
JUMPER DEFAULT = 1-2
1
2
3
R1161.0K
R129 100
R1281.0K
R1231.0K
R127 10K
R138 100
DNP
R113 10K
C84
220 pF
C79 150 pF
C78 150 pF
R114 10K
TP19
R139
100
DNP
R125 100
C89
220 pF
R118 0
C77 150 pF
C83 150 pF
C90
220 pF
C82
220 pF
J24
HDR_1X3
JUMPER DEFAULT = 1-2
1
2
3
GA0
GB0
GC4
GA1
GB1
GF0
GA4
GB4
OPB_P
OPA_OUT
OPB_OUT
OPA_N
CUR_A
CUR_B
Figure 14. OPAMP test circuit schematic
• With external OPAMP (default)
In phase A current sensing circuit, when the external OPAMP on FRDM-MC-LVPMSM
is used for current sensing, the jumpers configuration is described as follows. The pin 1
and pin 2 of J24 are connected, and J20 and J23 are both unconnected.
The sensing signal from the output of the external OPAMP is connected with GPIOA0
(ANA0) through an RC filter. The following figure shows the equivalent circuit.
R125
C82
GA0_IN
GA0
Figure 15. Equivalent circuit for phase A current sensing — with external OPAMP
For phase B current sensing, connect pin 1 and pin 2 of J25. Sensed phase B current
signal is connected to GPIOB0 (ANB0) through an RC filter. Figure 16 shows the
equivalent circuit.
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R
129
C84
GB0_IN
GB0
Figure 16. Equivalent circuit for phase B current sensing — with external OPAMP
• With DSC internal OPAMP
In phase A current sensing circuit, when the DSC internal OPAMP is used for current
sensing, the jumpers configuration is described as follows.
The pin 2 and pin 3 of J24 are connected, and J20 and J23 are both connected. The
equivalent circuit is shown in Figure 17. In this condition, GA0_IN and GA1_OPA_P
are signals at both sides of the shunt resistor, and ADC_MID is a bias voltage, which
makes sure the output of the OPAMP is a positive value and the typical value is 1.65 V.
GA0_IN is connected with GPIOA0 (OPAMPA_IN3) through R123, GPIOA0
(OPAMPA_IN3) is configured as inverting input of the OPAMPA. GA1_OPA_P
and ADC_MID are connected with GPIOA1 (OPAMPA_IN0) through R116 and
R113, respectively. GPIOA1 (OPAMPA_IN0) is configured as non-inverting input
of the OPAMPA. The R122 is between GPIOA0 (OPAMPA_IN3) and GPIOC4
(OPAMPA_OUT), and GPIOC4 (OPAMPA_OUT) is used as output of the OPAMPA.
Therefore, R122 is a negative feedback resistor. The signal of the GPIOC4
(OPAMPA_OUT) is the phase A current sensing signal.
The OPAMPA output signal OPA_OUT on GPIOC4 can be connected with ANA7
directly within DSC though ADC register configuration. RC filter can also be added
between the OPAMP and the ADC input when R138 and R140 are soldered, which is
not populated by default. In this case, the filtered OPAMP output signal is connected
with GPIOA4 (ANA4). If a 0 Ω resistor is soldered at the R138 position, and R140 is
DNP, C89 is connected with the OPAMPA output directly, which can reduce the noise
too.
OPAMPOPAMP
R123
R122
GC4
GA1
OPA_OUT
-
+
v-
v+
GA1_OPA_P
ADC_MID
GA0_IN
R116
R113
GA0
R138
DNP
C89
R140
GA4
DNP
C77
C79
OPAMP
R123
R122
GC4
GA1
OPA_OUT
-
+
v-
v+
GA1_OPA_P
ADC_MID
GA0_IN
R116
R113
GA0
R138
DNP
C89
R140
GA4
DNP
C77
C79
Figure 17. Equivalent circuit for phase A current sensing — with DSC internal OPAMP
The circuit designed for phase B current sensing is similar as phase A current sensing
circuit, connect pin 2 and pin 3 of J25, and the equivalent circuit is shown in Figure 18.
OPAMPOPAMP
R128
R127
GF0
GB1OPA_OUT
-
+
v-
v+
GB1_OPB_P
ADC_MID
GB0_IN
R117
R114
GB0R139
DNP
C90
R141
GB4
DNP
C78
C83
OPAMP
R128
R127
GF0
GB1OPA_OUT
-
+
v-
v+
GB1_OPB_P
ADC_MID
GB0_IN
R117
R114
GB0R139
DNP
C90
R141
GB4
DNP
C78
C83
Figure 18. Equivalent circuit for phase B current sensing — with DSC internal OPAMP
2.8 OpenSDA
OpenSDA is a serial and debug adapter circuit. It bridges serial and debug
communications between the USB host and the target processor MC56F80748.
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The OpenSDA circuit is based on the NXP Kinetis K26 family microcontroller
(MK26FN2M0VMI18) with 2 MB of embedded flash and an integrated USB controller.
OpenSDA comes preloaded with the firmware, which provides a debug protocol interface
and a virtual serial port interface.
The OpenSDA circuit provides a JTAG debug interface to MC56F80748. A standard USB
A male to micro B male cable is used for debugging via the USB connector (J12).
USB drivers for this onboard OpenSDA circuit are available in the host PC once the latest
CodeWarrior IDE or any P&E tools that support DSC have been installed.
For details about the JTAG connector, see Section 1.8.
The following table describes the OpenSDA signals connected to the target MCU
(MC56F80748).
OpenSDA signals MC56F80748 pin Description
SDA_RST_TGTMCU GPIOD4 (RESET_MCU) Reset to target MCU
OPENSDA_UART_RX GPIOC2 (Boot_TXD0) Function = TXD0; Peripheral = SCI0;
Direction = IO
OPENSDA_UART_TX GPIOC3 (Boot_RXD0) Function = RXD0; Peripheral = SCI0;
Direction = I
SDA_SWD_SWO GPIOD1 (TGTMCU_TDO) Test data out
SDA_SWD_SCK GPIOD2 (TGTMCU_TCK) Test clock
SDA_SWD_DOUT GPIOD3 (TGTMCU_TMS) Test mode select
SDA_SWD_DOUT_TDI GPIOD0 (TGTMCU_TDI) Test data in
Table 14. OpenSDA interface signals
2.9 Input/output headers
The MC56F80748 microcontroller is packaged in a 64-pin QFP package. Some pins
are utilized in onboard circuitry, however, many are directly connected to one of four I/O
headers (J1, J2, J3, and J4), which are also compatible with Arduino R3 pin layout.
The following tables describe the MC56F80000-EVK Arduino connectors pinout.
Pin Signal Pin Signal
2 GPIOF6 1 GA0_IN (CUR_A/CS_A_H)
4 GPIOE6 (GE6/PWMA_3B) 3 GB0_IN (CUR_B/CS_B_H)
6 GPIOE7 (GE7/PWMA_3A) 5 GA3/GB3_RC (CUR_C)
8 GPIOC10 (MOSI0/XB_OUT9) 7 GA2_RC (VOLT_DCB)
10 GPIOC8 (MISO0) 9 GB2_RC (CUR_DCB)
12 GPIOC9 (SCK0) 11 GA1_OPA_P (CS_A_L)
14 GND 13 GB1_OPB_P (CS_B_L)
16 AREF 15 ADC_MID
18 GPIOF2 (LP_SDA0) 17 Not connected
20 GPIOF3 (LP_SCL0) 19 Not connected
Table 15. J2 (2x10-pin) connector pinout
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