ST EVALCOMMBOARD User manual

June 2006 Rev 1 1/39
UM0240
User manual
ST Industrial Communication Board - EVALCOMMBOARD
Introduction
ST Industrial Communication Board (order code: EVALCOMMBOARD) is a platform for
Communication, Command and Control exchange with Industrial reference design boards.
Its goal is to provide ST Industrial customers a reliable and easily accessible communication
channel, between a controlling PC and Industrial reference design boards.
It is a unique platform that allows evaluating a wide range of Industrial products in their
application environment.
Application fields covered by this platform are:
●Power line communication
●Motor control and gate driving
●Intelligent power switches
Industrial Communication Board
www.st.com

Contents UM0240
2/39
Contents
1 System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Main power supply (VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 MCU Flash programming (VPP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 OpAmp negative supply (-5V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Microcontroller features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Internal time base generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 10-bit digital-to-analog converter (DAC) . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Operational amplifiers (OpAmp) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 Interfaces and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 USB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 Power line communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.5 In-circuit communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.6 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.7 Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.1 Power line communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.2 Motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
10 Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

UM0240 Contents
3/39
10.1 Device firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
10.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.2.1 Power Line Communication (PLC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.2.2 Motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
11 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.1 PLC ST7538/40 DEMOKIT software evaluation tool . . . . . . . . . . . . . . . . 28
11.1.1 The user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.2 Motor control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
12 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12.1 Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12.2 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12.3 PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
12.4 Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

List of tables UM0240
4/39
List of tables
Table 1. Voltages present on board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 2. Motor control interface pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 3. PLC interface digital signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 4. PLC interface analog signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 5. PLC interface control signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 6. Power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 7. ST motor control evaluation boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 8. Bil of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 9. Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

UM0240 List of figures
5/39
List of figures
Figure 1. Main power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 2. Flash programming and OpAmp power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 3. Power supplies PCB area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4. Industrial Communication Board connectors schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 5. Industrial Communication Board connectors pcb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 6. USB cable plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 7. Industrial Communication Board jumpers and switches on PCB . . . . . . . . . . . . . . . . . . . . 20
Figure 8. General purpose switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 9. General purpose switches voltages and decisions level . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10. Industrial Communication Board leds on PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 11. ST7538 dual channel reference design board (Rev 3.1) . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 12. ST7540 reference design board (Rev 2.0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 13. Motor control evaluation board EVAL6207N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 14. DFU graphic user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 15. A simple schematic of the PLC application environment . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 16. The main window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 17. Stepper motor GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 18. DC motor driving GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 19. Power dissipation and thermal analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 20. Industrial Communication Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 21. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 22. Industrial Communication Board and power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

System overview UM0240
6/39
1 System overview
The ST Industrial Communication Board is a general purpose board developed around the
following principles:
●Provide a reliable communication channel between a controlling PC and Industrial
reference design boards
●Provide flexibility, one board to control all Industrial reference designs
●Run dedicated firmware (FW) available for all reference designs
●Interact with dedicated software (SW) implementing reference design Graphical User
Interface (GUI)
This enables ST Industrial customers to control and test all products using the same
controlling platform.
The ST Industrial Communication Board is based on a ST72F651AR6 USB microcontroller,
providing as main interface to controlling Personal Computer a standard 12 Mbs USB,
available on all modern PCs. This provides very easy interconnections to globally available
laboratory equipment. An RS232 interface is present too, and can be used as spare
communication port.
Specific interfaces to reference design boards are present to provide flexibility towards
different applications.
A 10-bit Digital to Analog Converter (DAC) and high gain, high bandwidth amplifiers are
present on board.
Jumpers, switches and LEDs give further adaptability and visualization tools.
A full range of dedicated FW, GUIs and reference design boards are available for every ST
Industrial product, fully compatible with the ST Industrial Communication Board.

UM0240 Power supply
7/39
2 Power supply
Board components require the following voltage supplies.
These supplies are all derived from an input power supply that can be taken from four
different sources:
1. PLM 10V: connected to the 10V line of the PLM connector
2. 5V Motor: connected to the 5V line of the Motor connector
3. Phone Jack: external connector, compatible with common notebook power supply
connectors, bringing power supply in the 5V÷ 35V range
4. USB 5V: connected to the 5V line of the USB supply
This enhanced flexibility of source and source voltage selection coexists due to diodes D7,
D8, D10 and D12, which prevent the reverse current flowing in the supply inputs, keeping
different sources independent.
The higher voltage input will be the dominant supply.
LED D11 is turned on when the power supply is active.
Table 1. Voltages present on board
Function Supply Converter Device Input Range Output Value
Main Power
Supply VDD
Switching
Converter
(Buck)
L5973D 5V ÷ 35V 5V
MCU Flash
Programming VPP
Regulated
Charge Pump
Converter
ST662A (pin VOUT) Vdd 12V
OpAmp negative
supply -5V Non regulated Charge Pump ST662A (pin C1-) Vdd -5

Power supply UM0240
8/39
Figure 1. Main power supply

UM0240 Power supply
9/39
Figure 2. Flash programming and OpAmp power supply

Power supply UM0240
10/39
Figure 3. Power supplies PCB area
2.1 Main power supply (VDD)
The main power supply system of Industrial Com Board consists of a DC-DC switching
converter based on step-down regulator L5973 from ST. The switching regulator is designed
to provide 5V (VDD) stabilized on the output with an input range 5V ÷ 35V and it can be
assembled in the two following configurations:
●Buck: referring to Figure 1, the N-MOS M1 is removed and the diode D9 is replaced
with a short
●Buck-Boost (not optimized)
2.2 MCU Flash programming (VPP)
A second power supply is implemented in the Industrial board, in order to provide the 12V
voltage supply required by the microcontroller during the In-Application Programming (IAP)
of the embedded Flash memory.
This power supply consists in a charge pump DC-DC regulator implemented by the ST
device ST662A, which is a step-up converter designed for the Flash memory programming.
Note that the charge pump converter is itself supplied by the switching regulator output VDD.
The device can be shut down through line PD3 of the microcontroller, in order to reduce
power consumption and noise when IAP is not needed.

UM0240 Power supply
11/39
The connection between the charge pump output and the Vpp line is switched by the P-
MOS STS5DPF20L controlled by pin PF1 of the microcontroller.
This separates the IAP and In-Circuit Programming (ICP) and delivers VPP with a shorter
rising time.
The switch is closed when PF1 is low.
2.3 OpAmp negative supply (-5V)
The last power supply consists of a non-regulated negative charge pump derived from the
pin C1- of the ST622A, which works as an oscillator between 0V and VCC for the negative
charge pump composed by the two diodes, D14 and D15, and the two capacitors, C35 and
C36. This supply is used as negative supply for the two OPAMP U3A and U3B of LM358, in
order to provide them a complete rail-to-rail output range between -5V and VDD.

Microcontroller UM0240
12/39
3 Microcontroller
3.1 Microcontroller features
The board is based on the ST72F651AR6 USB microcontroller, its mains features are:
●Up to 8MHz ST7 control unit
●32 KBytes embedded Flash program memory
●5 KBytes embedded RAM memory
●UVLO
●Up to 47 general purpose IOs with 3 Interrupt sources, two separated IO banks (one
supplied at 5V and one between 2.7V and 5V).
This microcontroller embeds several on-chip peripherals:
●Programmable watchdog timer/counter
●Programmable DMA controller (DTC) with 256 bytes dedicated memory
●Full-speed USB controller with 5 endpoints and a 1280 bytes dedicated memory for
buffers
●One 16-bit timer with 2 Output Compare units
●A 10-bit PWM generator with 2 channels
●A full-duplex SPI peripheral (master / slave)
●I²C bus interface (single master)
●8-channels, 8-bit A/D Converter
3.2 RS-232 Interface
The RS-232 interface is emulated by software using:
●One general purpose IO () as TxD signal
●One Interrupt source IO () as RxD signal.
●One Output compare unit to generate the correct timing for transmission and reception.
The firmware implements a half-duplex RS-232 interface, whenever a simultaneous
reading/writing operation occurs the writing operation is aborted and the reading operation
is performed without loss of data.
3.3 Internal time base generation
An internal 1ms time base is generated using one output compare resource and a free
counter. The free counter is then used to generate up to 10 programmable timeout counters
(with 1ms resolution).

UM0240 10-bit digital-to-analog converter (DAC)
13/39
4 10-bit digital-to-analog converter (DAC)
The Industrial Communication Board embeds a 10(12)-bit buffered voltage-output DAC
implemented by the AD5317 (AD5327) converter from Analog Devices. The IC provides four
buffered rail-to-rail outputs, in the range 0 ÷ Vcc, with a slew rate of 0.7 V/µs.
The DAC is controlled by the Microcontroller (PC2, PC3, PC4) through a 3-wires serial
interface and is compatible with SPI, QSPI, MICROWIRE and DSP interface standards.
The AD5317 is connected to the microcontroller through its SPI interface (MOSI to DIN and
SCK to SCLK). The references for the four DACs are derived from two reference pins:
VrefAB for VoutA and VoutB, VrefCD for VoutC and VoutD. These reference inputs can be
configured as buffered or unbuffered inputs, through interface command.
On the Industrial board the reference for the output pair AB is connected directly to Vcc
supply, while the VrefCD is available in a double option configuration, thanks to the jumper
JP3:
1. Connected to the VCC supply
2. Connected to the DAC output VoutB. This option is designed in order to provide a fine
voltage adjustment for the CD output pair DAC reference: this function is suitable, e.g.,
in Motor Control Applications using Micro-stepping technique, for the synthesis of
discrete sinusoidal waveforms. In fact, while the DAC output VoutC or VoutD can
generate a discrete sinusoidal waveform, the DAC output VoutB is able to control the
amplitude of the said signal, in order to control finely the torque of the stepper motor.
The AD5317(AD5327) DACs incorporate a power-on reset circuit, which ensures that the
DAC outputs power up to 0 V and remain there until a valid write to the device takes place.
There is also an asynchronous active low CLR pin, connected to the RES line of Industrial
board, that clears all DACs to 0 V. The outputs of all DACs may be updated simultaneously
using the asynchronous LDAC input, controlled by the MCU pin PD1.
The DAC IC contains a power-down feature that reduces the current consumption of the
devices to 300 nA @ 5 V, by setting all outputs in high impedance state. The devices goes
into power-down mode when the pin PD connected to the PD2 MCU line is tied low.
On the PLM connector, the four DAC outputs VOUTA, VOUTB, VOUTC and VOUTD are
available directly, while on the Motor connector, VREF_A and VREF_B are available. These
two signals are provided by the two difference amplifiers U3A and U3B implemented by
LM358.

Operational amplifiers (OpAmp) UM0240
14/39
5 Operational amplifiers (OpAmp)
The LM358 consists of two independent, high gain (100 dB), high bandwidth (1.1 MHz) and
internally compensated operational amplifiers. In the Industrial Communication Board the
two amplifiers are designed in differential configuration, with a bipolar power supply 5V ÷ -
5V. The output signals consists of the difference signals VREF_A and VREF_B, obtained by:
●VREF_A = VOUTC - VOUTA
●VREF_B = VOUTD - VOUTA
The main purpose of the two OPAMPs is then to provide an analog voltage shifting of the
two signals VOUTC and VOUTD, with a voltage shift equal to VOUTA. The bipolar power
supply of the OPAMPs guarantees an output swing both positive and negative to the
resulting signals VREF_A and VREF_B.
This feature is important, for example in Motor Control Applications using Micro-stepping
techniques, for the synthesis of discrete sinusoidal waveforms: the OPAMPs analog shifting
provides the centering of the sinusoidal signal generated by the DACs around the 0 voltage
level.

UM0240 Interfaces and connectors
15/39
6 Interfaces and connectors
The ST Industrial Communication Board has 6 connectors to interface with power supply
(J9), Personal Computer (CON1 and J10), In Circuit Communication (J8) and ST Devices
Evaluation Boards (J6 and J7).
Figure 4. Industrial Communication Board connectors schematic

Interfaces and connectors UM0240
16/39
Figure 5. Industrial Communication Board connectors pcb
6.1 USB
The main communication channel with the controlling PC is through the ST72F651 Full
Speed USB interface, based on a Vendor Specific Class embedded in the Industrial
Communication Board firmware and a dedicated driver, part of the controlling software.
Once the USB cable is plugged to connector CON1, the Industrial Communication Board
takes its power supply from the 5V USB interface of the PC.
A second function of the USB interface is to provide the DFU (Device Firmware Upgrade)
functionality used to upgrade firmware.
The connecting cable should have a USB-B plug toward Industrial Communication Board
and a USB-A plug toward the PC as shown in Figure 6.
Figure 6. USB cable plugs

UM0240 Interfaces and connectors
17/39
6.2 RS-232 Interface
The RS-232 interface can be used as a communication channel to a PC running control
software. It consists of female connector J10, where only three pins are connected with the
DCE connections:
●5 →Ground
●3 →DCE TX
●2 →DCE RX
So the connection to a PC RS-232 port (DTE) must be done by a direct cable connecting:
●DTE pin3 to DCE pin 3
●DTE pin 2 to DCE pin 2
RS-232 signals are obtained and adapted to 5V circuitry by means of the ST232 multi-
channel RS-232 driver and receiver connected to two general purpose IOs (PD7 and PF0).
The microcontroller emulates the RS-232 interface by software.
The ST232 can be powered down, to reduce power consumption when RS232 interface is
not used, by opening jumper J11. In this case, two microcontroller pins (#44 and #52) can
be used as General Purpose IOs (PD7 and PF0).
6.3 Motor control
Communication with Motor Control boards is possible through connector J7. This is a 34-pin
connector providing the following signals, in the EVAL6207N case:
Table 2. Motor control interface pins
Pin number Signal name Description Generated by
1 VCC_REF 5V Supply Voltage EVAL6207N
3 SENSE_A Channel A Sense Voltage EVAL6207N
7 SENSE_B Channel B Sense Voltage EVAL6207N
11 +5V 5V Supply Voltage MCU
23 Ground Ground
27 LIMIT_A Channel A Over Current Flag EVAL6207N
29 LIMIT_B Channel B Over Current Flag EVAL6207N
31 VREFA Ch A PWM Current Control Ref Voltage MCU
33 VREFB Ch B PWM Current Control Ref Voltage MCU
4 LIMIT_B Channel A Over Current Flag EVAL6207N
8 LIMIT_A Channel B Over Current Flag EVAL6207N
10 RCA Ch A RC Monostable Voltage EVAL6207N
14 ENA Ch A Enable Signal MCU
20 IN1 Ch A Input 1 MCU
22 IN4 Ch B Input 2 MCU
26 IN3 Ch B Input 1 MCU

Interfaces and connectors UM0240
18/39
6.4 Power line communication
The board can communicate with a Power Line Communication Board through its 50-pin J6
connector providing four kinds of signals: digital signals, analog signals, control signals and
power signals.
28 IN2 Ch A Input 2 MCU
32 ENB Ch B Enable Signal MCU
Table 2. Motor control interface pins (continued)
Pin number Signal name Description Generated by
Table 3. PLC interface digital signals
Pin number Signal name Description Generated by
11 REGOK Register Ok signal. Modem
14 !CH2 Secondary channel select (active low). MCU
18 CH2 Secondary channel select (active high). MCU
35 CDPD Carrier or preamble detected signal. Modem
37 REG/DATA Register or Data access. Modem
39 RxD Serial Data Out. Modem
41 RxTx Reception or Transmission select signal. MCU
43 ZCOUT Zero crossing detection output. Modem
45 CLR/T Serial Data Clock. Modem
46 WD Watchdog counter reset. MCU
47 TOUT Timeout event signal (even Thermal
event on ST7538). Modem
48 BU/THERM Band in Use detection signal (even
Thermal event on ST7540). Modem
49 TxD Serial Data Input. MCU
50 PG Power good signal. Modem
Table 4. PLC interface analog signals
Pin number Signal name Description Generated by
3 MCLK Oscillator output (programmable) Modem
5 VDDF_Force Force MCU digital level to VDDF.Modem
8 RESET Reset Out for microcontroller Modem
16 SMeter Analog Signal Peak Meter output. Modem

UM0240 Interfaces and connectors
19/39
The two PLC interface control signals are connected in the PLM board either to the GND or
to VDD and are used to detect which modem is mounted on the board. There are four
possible configurations but only two are, at present, in use:
●00 (GND,GND) for the ST7538
●10 (GND,VDD) for the ST7540
6.5 In-circuit communication
The In Circuit Communication connector provides access to several debug features and to
the In Circuit Programming function that enables complete writing to the MCU Flash
memory.
6.6 Power supply
As described in Section 2: Power supply, the ST Industrial Communication Board can take
is power supply from different sources. If an external dedicated power supply is selected, it
must be in the 5V ÷ 35V range.
Taking into account that the board has a power consumption in steady state of
approximately 50mW, a value of 500mW is suggested.
The external power supply connector is a standard 2.5-mm phone jack that is compatible
with common PC notebook power supply connectors.
6.7 Jumpers
Five jumpers are present on the board to give flexibility on the use of reset management,
DAC reference voltage; In Circuit Communication and RS232 interface power supply.
Table 5. PLC interface control signals
Pin number Signal name Description Generated by
20 B_ID_PLM_1 Board ID for PLM Applications (MSB) Modem
28 B_ID_PLM_0 Board ID for PLM Applications (LSB) Modem
Table 6. Power connections
Pin number Signal name Description Generated by
2 PLM_10V 10V power supply Modem
4 VDD 3.3V/5V power supply Modem
6 VDDF Digital power supply Modem
22,34 GND Ground Ground

Interfaces and connectors UM0240
20/39
Figure 7. Industrial Communication Board jumpers and switches on PCB
Jumper JP2 connects the ST72F651 reset pin to a reset signal coming from the PLM board.
This is used to reset the MCU after a Power Line Modem reset event.
Setting:
●Open = MCU reset not connected to PLM reset
●Closed = MCU reset connected to PLM reset
Jumper JP3 selects the DAC voltage reference for the C-D output pair. Section 4: 10-bit
digital-to-analog converter (DAC) describes JP3 use.
Setting:
●1-2 = Reference from VDD
●2-3 = Reference from AB output
Jumpers JP4 and JP5 disconnect LED DL3 and DL4 loads from the MCU for use with In
Circuit Communication.