Rs-232 Interface; Motor Control; Table 2. Motor Control Interface Pins - ST EVALCOMMBOARD Manual

UM0240
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.
Pin number
1
3
7
11
23
27
29
31
33
4
8
10
14
20
22
26
Motor control interface pins
Signal name
VCC_REF
SENSE_A
SENSE_B
+5V
Ground
LIMIT_A
LIMIT_B
VREFA
VREFB
LIMIT_B
LIMIT_A
RCA
ENA
IN1
IN4
IN3
Description
5V Supply Voltage
Channel A Sense Voltage
Channel B Sense Voltage
5V Supply Voltage
Ground
Channel A Over Current Flag
Channel B Over Current Flag
Ch A PWM Current Control Ref Voltage
Ch B PWM Current Control Ref Voltage
Channel A Over Current Flag
Channel B Over Current Flag
Ch A RC Monostable Voltage
Ch A Enable Signal
Ch A Input 1
Ch B Input 2
Ch B Input 1
Interfaces and connectors
Generated by
EVAL6207N
EVAL6207N
EVAL6207N
MCU
EVAL6207N
EVAL6207N
MCU
MCU
EVAL6207N
EVAL6207N
EVAL6207N
MCU
MCU
MCU
MCU
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