ST EVALSPEAr320PLC User manual

December 2010 Doc ID 16542 Rev 4 1/50
UM0842
User manual
EVALSPEAr320PLC evaluation board for the SPEAr320
Introduction
This user manual describes the implementation of the SPEAr320PLC evaluation board
(order code: EVALSPEAr320PLC). This evaluation board can be used to evaluate the
SPEAr320 microprocessor with a variety of devices and especially its Media Independent
Interface (MII) Automation mode.
The EVALSPEAr320PLC evaluation board kit comprises two boards:
●CPU board
●MII mode application board
The SPEAr320 microprocessor is mounted on the CPU board that is plugged on the MII
mode application board.
The application board is equipped with two Ethernet, three RS-232, one RS-485, two CAN,
SPI, I²C communication interfaces and MicroSD card socket with SDIO interface. There are
also two general-purpose push-buttons, four LEDs, a temperature sensor and a
potentiometer available for the user interface.
The application board also includes digital input/output serial/parallel connectors with a
pinout compatible to many existing evaluation boards from ST:
●Digital input serial: STEVAL-IFP007V1
●Digital input parallel: STEVAL-IFP004V1 and STEVAL-IFP008V1
●Digital output serial: STEVAL-IFP009V1
●Digital output parallel: STEVAL-IFP002V1, STEVAL-IFP001V1 and STEVAL-IFP006V1
The application board can be powered using a standard DC power supply (7 V to 30 V DC)
or directly using a 24 V DC industrial mains supply.
Figure 1. SPEAr320 MII mode application board
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Contents UM0842
2/50 Doc ID 16542 Rev 4
Contents
1 CPU board features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 CPU board block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Application board features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Application board block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Application board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Connecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Bootinging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 Digital input / digital output connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.3 Controller–area network bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.4 RS-232 and RS-485 transceivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.5 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.6 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.7 Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.8 General-purpose ADC connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.9 General-purpose buttons (B1 and B2) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.10 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.11 Reset button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.12 MicroSD card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 CAN DB9 plug connectors (CN1 and CN2) . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Digital input serial connector (CN3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Digital output serial connector (CN4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4 Digital input parallel connector (CN5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
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UM0842 Contents
Doc ID 16542 Rev 4 3/50
6.5 Digital output parallel connector (CN6) . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.6 Ethernet RJ-45 connectors (CN7 and CN8) . . . . . . . . . . . . . . . . . . . . . . . 20
6.7 General-purpose ADC connector (CN9) . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.8 General-purpose GPIO and I2C connector (CN10) . . . . . . . . . . . . . . . . . 21
6.9 RS-485 DB9 socket and header connector (CN11 and CN12) . . . . . . . . 22
6.10 RS-232/UART0 DB9 plug connector (CN13) . . . . . . . . . . . . . . . . . . . . . . 22
6.11 RS-232/UART2 DB9 plug connector (CN14) . . . . . . . . . . . . . . . . . . . . . . 23
6.12 RS-232/UART1 DB9 plug connector (CN15) . . . . . . . . . . . . . . . . . . . . . . 23
6.13 MicroSD card connector (CN16) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.14 Power supply connectors (CN17 and CN18) . . . . . . . . . . . . . . . . . . . . . . 25
6.15 SPEAr320 CPU board connectors (J1 and J2) . . . . . . . . . . . . . . . . . . . . 25
Appendix A CPU board hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
A.1 CPU board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
A.2 Block descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
A.2.1 Dynamic memory subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
A.2.2 Static memory subsystem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
A.2.3 USB 2.0 subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
A.2.4 Debug interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
A.2.5 Serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
A.2.6 Real time clock (battery powered) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
A.2.7 General power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
A.3 CPU board switch and jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A.3.1 Switch 1 settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
A.3.2 Switch 2 settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
A.3.3 Jumpers & connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A.4 CPU board expansion connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
A.5 CPU board bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Appendix B Application board bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Appendix C License agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
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List of figures UM0842
4/50 Doc ID 16542 Rev 4
List of figures
Figure 1. SPEAr320 MII mode application board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. CPU board block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Application board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. EVALSPEAR320PLC board with digital input and digital output cards . . . . . . . . . . . . . . . 11
Figure 6. 8/16 input channel current limiter based on SCLT3-8, STEVAL-IFP007V1 . . . . . . . . . . . . 12
Figure 7. CAN DB9 plug connectors pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 8. Digital input serial connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9. Digital output serial connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 10. Digital input parallel connector (CN5) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 11. Digital output parallel connector (CN6) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 12. Ethernet RJ-45 connectors (CN7 and CN8) - Front view . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 13. General-purpose ADC connector (CN9) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14. General-purpose GPIO and I2C connector (CN10) pinout . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15. RS-485 DB9 socket connector CN11 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 16. RS-485 header connector CN12 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 17. RS-232/UART0 DB9 plug connector (CN13) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 18. RS-232/UART2 DB9 plug connector (CN14) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 19. RS-232/UART1 DB9 plug connector (CN15) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 20. MicroSD card connector (CN16) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 21. Power supply connector CN18 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 22. Power supply connector CN17 diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 23. 86-pin connectors (J1 and J2) pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 24. CPU board layout (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 25. CPU board layout (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 26. Serial cable setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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UM0842 List of tables
Doc ID 16542 Rev 4 5/50
List of tables
Table 1. MII addresses of the Ethernet PHYs (U5 and U6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 2. Default configuration of the Ethernet PHYs (U5 and U6) . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 3. SMI interface configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 4. CAN0 transceiver settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5. CAN1 transceiver settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6. UART2 RS-232/RS-485 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 7. UART0/RS-232 transceiver signals from the CPU board . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 8. U16 DC/DC converter jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 9. ADC conversion settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 10. General-purpose LED configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 11. CAN DB9 plug connectors description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 12. Digital input serial connector description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 13. Digital output serial connector description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 14. Digital input parallel connector (CN5) description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 15. Digital output parallel connector (CN6) description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 16. Ethernet RJ-45 connectors (CN7 and CN8) description . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 17. General-purpose ADC connector (CN9) description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 18. General-purpose GPIO and I2C connector (CN10) pinout description. . . . . . . . . . . . . . . . 21
Table 19. RS-485 DB9 socket connector CN11 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 20. RS-485 header connector CN12 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 21. RS-232/UART0 DB9 plug connector (CN13) description . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 22. RS-232/UART2 DB9 plug connector (CN14) description . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 23. RS-232/UART1 DB9 plug connector (CN15) description . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 24. MicroSD card connector (CN16) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 25. Power supply connector CN18 description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 26. Power supply connector CN17 description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 27. 86-pin connector (J1) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 28. 86-pin connector (J2) description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 29. Switch SW1 bits [2:1] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Table 30. Switch 1 (SoC functional configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 31. Switch 1 (debug configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 32. Switch 1 (functional configuration) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table 33. Switch 2 settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 34. CPU board extension connector J12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 35. CPU board extension connector J13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 36. List of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 37. List of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 38. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
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CPU board features UM0842
6/50 Doc ID 16542 Rev 4
1 CPU board features
●SPEAr320 embedded MPU
●Up to 2 Gbit DDR2 333 MHz (standard 128 Mbytes)
●Up to 16 Mbyte Serial Flash memory (standard 8 Mbytes)
●Two USB 2.0 full host port channels
●One USB 2.0 host device port
●One serial port (up to 115 baud)
●JTAG Debug ports
For more information about the CPU board, please refer to Appendix A: CPU board
hardware description on page 28.
1.1 CPU board block diagram
Figure 2. CPU board block diagram
NOR
Flash DDR2
Power
Supply
Expansion Connector (Bottom)
Expansion Connector (Top)
SPEAr320
Debug I/F
USB 2.0
Device
USB 2.0
Host 1
USB 2.0
Host 0
Serial I/F
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UM0842 Application board features
Doc ID 16542 Rev 4 7/50
2 Application board features
●2 x Ethernet RJ-45 connectors (ST802RT1A)
●2 x CAN DB9 plug connectors
●3 x RS-232 DB9 plug connectors (ST3232EBTR)
●1 x RS-485 DB9 socket connector (ST3485EBDR)
●Digital input connectors (parallel and serial) compatible with STEVAL-IFP007V1,
STEVAL-IFP008V1 and STEVAL-IFP004V1 evaluation boards
●Digital output connectors (parallel and serial) compatible with STEVAL-IFP009V1,
STEVAL-IFP001V1, STEVAL-IFP002V1 and STEVAL-IFP006V1 evaluation boards
●On-board temperature sensor (STLM20W87F) and potentiometer (analog input for
ADC)
●Analog extension connector featuring 8 ADC lines
●General-purpose extension connector with GPIOs and I2C functionality
●DC/DC converter L7986A (+24 V / +5 V)
●MicroSD card socket
●4 LEDs, 2 general-purpose buttons and system reset button
2.1 Application board block diagram
Figure 3. Block diagram
ST802RT1A
SPEAr™320
CPU
Board
CAN 2
Digital input serial
Digital input
Digital output serial
Digital output
ST802RT1A
RJ
4
DC/DC
+5V
Button
Reset
RJ4
RS232
DB9/M
RS232
DB9/M
DB9/M
RS232
DB9/F
RS485
Potentiometer
Temperatur
e
ADC connector
DB9/M
GPIO/I2C
LEDs
Micro SD card CAN 1 DB9/M
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Application board layout UM0842
8/50 Doc ID 16542 Rev 4
3 Application board layout
Figure 4. Application board layout
U9
Temperature
sensor
LEDs
CN16
MicroSD
card
CN1
CAN0
CN2
CAN1
RS232_0/
UART0
RS232_1/
UART1
CN14
RS232_2/
UART2
CN12
RS485/
UART2
CN7
E
t
h
e
rn
et
1
CN8
Ethernet2
CN3
Digital
input
serial
CN5
Digital
input
parallel
CN18, CN17
Power plugs
CN6
Digital output
p
ara l lel
R62
Potentiometer
CN4
Digital output
serial
B1
User
button 1
B2
User
button 2
B3
Reset SPEAr320
CPU board
CN10
GPIO, I2C
connector
CN9
ADC
connector
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UM0842 Getting started
Doc ID 16542 Rev 4 9/50
4 Getting started
4.1 Unpacking
Warning: This board contains static sensitive devices.
The EVALSPEAr320PLC evaluation board is shipped in protective anti-static packaging. Do
not submit the board to high electrostatic potentials, and follow good practices for working
with static sensitive devices.
●Wear an anti-static wristband. Wearing a simple anti-static wristband can help
prevent ESD from damaging the board.
●Zero potential. Always touch a grounded conducting material before handling the
board, and periodically while handling it.
●Use an anti-static mat. When configuring the board, place it on and anti-static mat to
reduce the possibility of ESD damage.
●Handle only the edges. Handle the board by its edges only, and avoid touching board
components.
4.2 Connecting
1. Connect a serial cable from the application board (connector CN13: RS232_0/UART0)
to a host PC (see Figure 4: Application board layout).
2. On a host PC running Windows or Linux, start the Terminal program.
3. Connect a power supply to the SPEAr320 PLC evaluation board as described in
Section 5.5: Power supply on page 14.
4. Power on the board. The Terminal program displays a sequence of boot messages
followed by the Linux console prompt.
For more information, refer to user manual UM0844 "Getting started with Linux for SPEAr"
available at www.st.com/spear.
4.3 Bootinging
The SPEAr320 PLC evaluation board can boot a Linux kernel pre-installed in the serial NOR
Flash.
At power on, the serial port outputs a brief header message with some uBoot information
(uBoot version, SDK version, and some internal hardware information). At this point you can
choose to:
●Stop the system directly in uBoot: Press the spacebar on the host computer
keyboard before the boot delay time expires (default is 3 seconds).
●Boot Linux: The system logs you in automatically as super user and the Linux shell
prompt displays on the screen.
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Configuration UM0842
10/50 Doc ID 16542 Rev 4
5 Configuration
5.1 Ethernet
There are two Ethernet PHYs (U5 and U6) available on the board that are connected
through the media independent interfaces (MII) to the Ethernet MACs on the CPU board
processor.
By default the MII addresses of the Ethernet PHYs are selected as shown in Ta b l e 1.
)
By default the initial configuration of the Ethernet PHYs is selected as shown in Table 2.
There are two LEDs embedded in each RJ-45 connector (CN7 and CN8) that indicate the
status of the line:
●The green LED in the connector is driven on continuously when the Ethernet link is
established with the counterpart.
●The yellow LED in the connector blinks when there is TX or RX activity.
The Serial Management Interface (SMI) is part of the MII interface and is used to transfer
management information between the MAC and PHY (access of the PHY registers). There
are two SMI interfaces coming from each Ethernet MAC. It is possible to use only one of
them to control both Ethernet PHYs or each SMI can be used separately for each PHY.
Table 1. MII addresses of the Ethernet PHYs (U5 and U6)
Ethernet PHY MII address
U5 0x01
U6 0x02
Table 2. Default configuration of the Ethernet PHYs (U5 and U6)
Function Default configuration
Auto negotiation Enabled
10/100 Mbits 100 Mbits selected for auto negotiation advertisement
Half/Full duplex Full duplex selected for auto negotiation advertisement
Internal Loopback Disabled
Power down Disabled (PHY is not in Power down state)
MII/RMII mode MII selected
Table 3. SMI interface configuration
Function Default configuration
MII1_MDC, MII1_MDIO used for PHY1 (U5) and
MII2_MDC, MII2_MDIO used for PHY2 (U6)
R93,R94, R95, R96 loaded
R27, R29 not loaded (Default)
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UM0842 Configuration
Doc ID 16542 Rev 4 11/50
For the two Ethernet PHYs (U5 and U6 in MII mode) to function correctly, it is necessary to
clock them using a 25-MHz clock. There are two ways to deliver the 25-MHz clock signal to
the devices.
5.2 Digital input / digital output connectors
The digital input and digital output connectors are used to extend the EVALSPEAR320PLC
board with the industrial input and output cards.
The input sensors (for example, proximity switches) of the controlled industrial process are
normally decoupled and connected by the current limiters based on the CLT and SCLT
devices of the microcontroller. The digital outputs, also electrically decoupled, are based on
high-side drivers which are used in industrial environments to switch industrial loads (valves,
relays, …) and process control. For both the inputs and outputs, we can use either serial
(SPI) or parallel (GPIO) IN/OUT cards.
The EVALSPEAR320PLC board is compatible with the following cards:
●Digital input serial (CN3): STEVAL-IFP007V1
●Digital output serial (CN4): STEVAL-IFP009V1
●Digital input parallel (CN5): STEVAL-IFP004V1 and STEVAL-IFP008V1
●Digital output parallel (CN6): STEVAL-IFP002V1, STEVAL-IFP001V1 and STEVAL-
IFP006V1
Figure 5. EVALSPEAR320PLC board with digital input and digital output cards
MII1_MDC, MII1_MDIO used for both PHYs (U5, U6) R93, R94, R27, R29 loaded
R95, R96 not loaded
MII2_MDC, MII2_MDIO used for both PHYs (U5, U6) R95, R96, R27, R29 loaded
R93, R94 not loaded
Table 3. SMI interface configuration (continued)
Function Default configuration
Digital input
(
current limiters
)
EVALSPEAR320PLC
board
Controlled
p
rocess
Digital output
(
hi
g
h side drivers
)
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Configuration UM0842
12/50 Doc ID 16542 Rev 4
Figure 6. 8/16 input channel current limiter based on SCLT3-8, STEVAL-IFP007V1
5.3 Controller–area network bus
The EVALSPEAR320PLC evaluation board supports two channels of CAN2.0A/B compliant
controller–area network (CAN) bus communication based on a 3.3 V CAN transceiver. High-
speed mode, standby mode and slope control mode are available and can be selected by
setting jumper JP1 for CAN0 and jumper JP4 for CAN1.
Table 4. CAN0 transceiver settings
Jumper Description Configuration
JP1
CAN0 transceiver works in Standby mode when JP1 is set.
CAN0 transceiver works in High-speed mode when JP1 is set
(Default).
CAN0 transceiver works in Slope control mode when JP1 is
open.
JP2 CAN0 terminal 120 Ωresistor is enabled when JP2 is loaded.
Default setting: loaded
123
123
123
12
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UM0842 Configuration
Doc ID 16542 Rev 4 13/50
5.4 RS-232 and RS-485 transceivers
There are three RS-232 DB9 plug connectors and one RS-485 DB9 socket connector with a
Profibus DP compliant pinout available on the board.
UART0 features the full modem control signals and fully utilizes U10, U12 and partly U14
RS-232 transceivers. The RS232_0 signals are available through the CN13 connector.
Optionally when the U10 RS-232 transceiver is not soldered on the board, it is possible to
line in RS232_TXD and RS232_RXD signals from the CPU board to the CN13 connector.
UART1 features only RX/TX functionality and is connected to the U14 RS-232 transceiver
which RS232_1 signals are then available from the CN15 connector.
UART2 features only RX/TX functionality and uses U13 RS232 transceiver which RS232_2
signals are available from the CN14 connector. Optionally by setting jumpers JP12 and
JP13, the UART2 RX/TX lines can be connected to the RS-485 transceiver U11 whose
outputs are then available from connectors CN11 and CN12. The RS-485 transceiver U11
can be controlled through GPIO pins PL_GPIO77 (receiver enable, R70 - pull up) and
PL_GPIO78 (driver output enable, R73 pull down). Check the ST3485 datasheet for further
details about all possible transceiver configurations.
Table 5. CAN1 transceiver settings
Jumper Description Configuration
JP4
CAN1 transceiver works in standby mode when JP4 is set.
CAN1 transceiver works in high-speed mode when JP4 is set
(Default).
CAN1 transceiver works in slope control mode when JP4 is
open.
JP5 CAN1 terminal 120Ωresistor is enabled when JP5 is loaded.
Default setting: loaded
123
123
123
12
Table 6. UART2 RS-232/RS-485 configuration
Jumper Description Configuration
JP11
Connects +5.0 V to the RS-485 (R71, R72 and R74)
termination network.
Connects +3.3 V to the RS-485 (R71, R72 and R74)
termination network (Default).
123
123
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Configuration UM0842
14/50 Doc ID 16542 Rev 4
Caution: Do not fit the jumpers when the U10 RS-232 transceiver is soldered on the evaluation
board.
5.5 Power supply
There are two options to supply the SPEAr320 PLC evaluation board:
1. Connecting the +5 V voltage adapter (delivered in the EVALSPEAr320PLC package) to
the J11 power voltage connector on the CPU board.
2. Connecting a 7 V to 30 V DC power source (not included in the EVALSPEAr320PLC
package) to either connectors CN17 or CN18 on the application board.
The input voltage is connected to the DC/DC converter U16 (L7986A or optionally L5973A).
The board is protected against overvoltages by the D4 transil diode (SM6T33A) and against
possible reverse polarity voltage from an incorrect power plug-in by the D3 Schottky diode
(STPS3L40U).
Warning: Do not use both Power supply options at the same time.
Doing this may destroy the boards.
JP12
(SMD
resistor) (1)
UART2_TX line is connected to the RS-485 transceiver U11.
UART2_TX line is connected to the RS-232 transceiver U13
(Default).
JP13
(SMD
resistor)(1)
UART2_RX line is connected to the RS-485 transceiver U11.
UART2_RX line is connected to the RS-232 transceiver U13
(Default).
1. The configuration of this JP is done loading a 0 ohm resistance between two different positions.
Table 7. UART0/RS-232 transceiver signals from the CPU board
Jumper Description
JP17 Connects the RS232_TXD signal of the CPU board RS-232 transceiver to CN13
(UART0) Default setting: Not loaded
JP18 Connects the RS232_RXD signal of the CPU board RS-232 transceiver to CN13
(UART0) Default setting: Not loaded
Table 6. UART2 RS-232/RS-485 configuration (continued)
Jumper Description Configuration
1 2 3
1 2 3
1 2 3
1 2 3
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UM0842 Configuration
Doc ID 16542 Rev 4 15/50
5.6 Temperature sensor
There is an analog temperature sensor (STLM20) available on the board that is connected
to the analog input AIN0 of the CPU board. It is possible to disconnect it by removing jumper
JP10. The jumper is loaded by default.
5.7 Potentiometer
There is a 10 kΩpotentiometer available on the board connected to the analog input AIN1 of
the CPU board. It is possible to disconnect it by removing jumper JP9. The jumper is loaded
by default.
5.8 General-purpose ADC connector
Eight analog input lines are available on connector CN9. Inside the connector it is also
possible to determine the range of the conversion by setting the conversion limits on the pin
CN9-19 (lower limit) and CN9-1 (upper limit) via jumpers JP7 and JP8.
Table 8. U16 DC/DC converter jumpers
Jumper Description Configuration
JP14 Can be used to disconnect the +5 V delivered from the DC/DC
converter U16 (Default - loaded).
JP15
(SMD
resistor)(1)
1. The configuration of this JP is done loading a 0 ohm resistance between two different positions.
For L7986A the jumper must be set (Default).
Optional when L5973A would be assembled, the jumper must
be set as shown at right.
JP16
(SMD
resistor)(1)
For L7986A the jumper must be set as shown at right. (Default)
Optional when L5973A would be assembled, the jumper must
be set as shown at right.
12
1 2 3
1 2 3
1 2 3
1 2 3
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Configuration UM0842
16/50 Doc ID 16542 Rev 4
The following relation between the pins should be guaranteed in the application:
5.9 General-purpose buttons (B1 and B2)
There are two general-purpose buttons (B1 and B2) available on the top side of the board.
Button B1 can be disconnected from the input CPU board by soldering out resistor R56 and
button B2 by soldering out resistor R61.
5.10 LEDs
There are 4 general-purpose LEDs (LD1-LD4) available on the top side of the board. All
LEDs are driven on when the related GPIO pin is driven high.
Table 9. ADC conversion settings
Jumper Description Configuration
JP7
Connects the +2.5 V ADC evaluation board ADC supply
voltage to the ADC_VREFP pin of the CPU board (Default).
Connects the external ADC application supply voltage to the
ADC_VREFP pin of the CPU board.
JP8
Connects the evaluation board GND of the ADC supply voltage
domain to the ADC_VREFN pin of the CPU board (Default).
Connects the external ADC application GND (lower limit)
supply voltage to the ADC_VREFN pin of the CPU board.
0 V ≤CN9-1 ≤CN9-3 - CN9-17 ≤CN9-19 ≤+2.5 V
GND ≤ADC_VREFN ≤AIN0 -AIN7 ≤ADC_VREFP ≤+2.5 V ADC
123
123
123
123
Table 10. General-purpose LED configuration
GPIO pin LED
PL_GPIO47 LD1
PL_GPIO49 LD2
PL_GPIO58 LD3
PL_GPIO64 LD4
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UM0842 Configuration
Doc ID 16542 Rev 4 17/50
5.11 Reset button
A manual reset button (B3) is available on the board's top side. It resets the microprocessor
on the core board. It can be disconnected from the input reset signal of the core board by
soldering out resistor R65. In order to perform a hardware reset of the first Ethernet PHY U5
(ETH1), it is necessary to drive low pin PL_GPIO66 of the microprocessor. In order to
perform a hardware reset of the second Ethernet PHY U6 (ETH2), it is necessary to drive
low pin PL_GPIO76 of the microprocessor.
5.12 MicroSD card
The MicroSD card connector connected to the SDIO interface of the EVALSPEAR320PLC is
available on the board. MicroSD card detection is managed by the standard SDIO signal
SDCD when the card is inserted. In order to power-up the MicroSD card properly, it is
necessary to detect the card insertion and then to enable the single channel power switch
U15 by means of PL_GPIO61 (active low).
Using the thermal and short-circuit protection of the power switch, it is possible to detect
overcurrent conditions (> 500 mA) on the MicroSD card connector by pin PL_GPIO57 which
is connected to the overcurrent pin of U15. By default the U15 power output is disabled by
the R83 pull-up resistor connected to the Enable pin of the power switch.
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Connectors UM0842
18/50 Doc ID 16542 Rev 4
6 Connectors
6.1 CAN DB9 plug connectors (CN1 and CN2)
Figure 7. CAN DB9 plug connectors pinout
6.2 Digital input serial connector (CN3)
This connector enables connection of industrial output card STEVAL-IFP007V1.
Figure 8. Digital input serial connector pinout
Table 11. CAN DB9 plug connectors description
Pin Description Pin Description
1, 4, 8 NC 7 CANH
2CANL 3,6GND
5 Chassis 9 Optional supply voltage (+3.3 V or +5.0 V)
Table 12. Digital input serial connector description
Pin Signal Pin Signal Pin Signal Pin Signal
1NC6NC11
SSP_MOSI
(PL_GPIO9) 16 NC
2NC7NC12
SSP_CLK
(PL_GPIO8) 17 +3.3 V
3NC8NC13
SSP_SS0
(PL_GPIO7) 18 GND
4NC9NC14
SSP_MISO
(PL_GPIO6) 19 +3.3 V
5 NC10NC15NC20GND
1
2
3579
46810
11 13 15 17 19
12 14 16 18 20
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UM0842 Connectors
Doc ID 16542 Rev 4 19/50
6.3 Digital output serial connector (CN4)
This connector enables connection of industrial output card STEVAL-IFP009V1.
Figure 9. Digital output serial connector pinout
6.4 Digital input parallel connector (CN5)
This connector enables connection of industrial input cards based on CLT, PCLT devices -
STEVAL-IFP004V1 and STEVAL-IFP008V1.
Figure 10. Digital input parallel connector (CN5) pinout
Table 13. Digital output serial connector description
Pin Signal Pin Signal Pin Signal Pin Signal
1 NC 6 NC 11 NC 16 NC
2NC7NC12
SSP_MOSI
(PL_GPIO9) 17 +3.3 V
3NC8NC13
SSP_MISO
(PL_GPIO6) 18 GND
4NC9
SSP_CLK
(PL_GPIO8) 14 SSP_SS3
(PL_GPIO35) 19 +3.3 V
5 NC 10PL_GPIO5615 NC 20 GND
1
2
3579
46810
11 13 15 17 19
12 14 16 18 20
Table 14. Digital input parallel connector (CN5) description
Pin Signal Pin Signal
1 +3.3 V 6 PL_GPIO71
2 GND 7 PL_GPIO70
3 PL_GPIO74 8 PL_GPIO73
4 PL_GPIO79 9 PL_GPIO72
5 PL_GPIO75 10 PL_GPIO69
1
2
3579
46810
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Connectors UM0842
20/50 Doc ID 16542 Rev 4
6.5 Digital output parallel connector (CN6)
This connector enables connection of industrial output cards: STEVAL-IFP002V1, STEVAL-
IFP001V1, STEVAL-IFP006V1.
Figure 11. Digital output parallel connector (CN6) pinout
6.6 Ethernet RJ-45 connectors (CN7 and CN8)
Figure 12. Ethernet RJ-45 connectors (CN7 and CN8) - Front view
Table 15. Digital output parallel connector (CN6) description
Pin Signal Pin Signal Pin Signal
1 +3.3 V 6 PL_GPIO52 11 PL_GPIO55
2 GND 7 PL_GPIO65 12 NC
3 PL_GPIO53 8 PL_GPIO62 13 NC
4 PL_GPIO54 9 PL_GPIO59 14 NC
5 PL_GPIO68 10 PL_GPIO60
1
2
3579
46810
11 13
12 14
Table 16. Ethernet RJ-45 connectors (CN7 and CN8) description
Pin Description Pin Description
1 TxData+ 2 TxData-
3 RxData+ 4 NC
5 NC 6 RxData-
7NC8NC
18
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