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UM0240 датащи(PDF) 17 Page - STMicroelectronics

номер детали UM0240
подробное описание детали  ST Industrial Communication Board - EVALCOMMBOARD
PDF  39 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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UM0240 датащи(HTML) 17 Page - STMicroelectronics

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UM0240
Interfaces and connectors
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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



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