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UM0193 Datasheet(PDF) 4 Page - STMicroelectronics

Part # UM0193
Description  Getting Started with the ARMIC30 Evaluation Board
PDF  35 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0193 Datasheet(HTML) 4 Page - STMicroelectronics

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Hardware
UM0193
4/35
1.1
RS-232 interface
The ST202E Transceiver ensures RS-232 communication through the UART0 serial
channel of the STR730F microcontroller as shown in Figure 4.
The maximum speed of this interface is 230 Kbps.
The UART0 channel can be used for simple communication and internal Flash memory
programming (for example, when using the RFLASHER application from Raisonance).
A male, 9-pin D-Sub connector (J8) provides the RS-232 connection. For correct
interconnection with a PC, a “null-modem” cable (crossed Rx | Tx signals) should be used.
Jumper 35 can be used to select Loop mode (for testing purposes) as described in
Appendix C: Jumper settings.
Figure 3.
RS-232 (J8), RS-485 (J12) and CAN (J15) connector pinout
Figure 4.
RS-232 schematic diagram
Table 1.
RS-232 Connections
J8 Pin
Signal
STR730F MCU
Peripheral
2
RxD (Receive Data)
Port 6.8
UART0
3
TxD (Transmit Data)
Port 6.9
UART0
5GND
1, 4, 6 to 9
Not connected
Shielding
Connected to GND by R24 || C23 (100 k
Ω || 4.7 nF)
1
234
5
6
7
89
1
234
5
6
7
89
RS-485
RS-232 and CAN
ETXD0
ERXD0
5V
5V
5V
TxD 232
RxD 232
1
2
J35
R22
10k
R22
10k
1
2
3
4
5
6
7
8
9
M1
M2
J8
R24 M1
C21
100n
C21
100n
R23 0R
C24
100n
n
C20
100n
C1+
1
C1-
3
C2+
4
C2-
5
V+
2
V-
6
R1OUT
12
R2OUT
9
T1IN
11
T2IN
10
R1IN
13
R2IN
8
T1OUT
14
T2OUT
7
U3
ST202E
U3
ST202E
C23
4n7/500V
22
00n
C22
100n
C19
100n
C19
100n
DSUB9-Plug
Ai11693



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