ST TN100 RF, Руководство пользователя, Страница: 11 / 37

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UM0579 TN100 sensor board
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3.1.5 RS-232 connector (CN5)
The RS-232 communication is realized by the RS-232 transceiver connected to the
USART1 microcontroller serial channel. Signal connections are shown in
Table 6 . This
channel can be used for simple communication and for microcontroller internal Flash
memory programming. The female 9-pin D-SUB connector type is assembled. The
connector pinout and signal connection is shown in
Figure 9 . For correct interconnection
with a PC, a direct cable should be used.
Figure 9. RS-232 connector (CN5) pinout
Figure 10. Switch S7 - RS-232 lines TX/RX cross or direct cable selection
Table 5. USB connector (CN4) pin description
Pin Connector pin
1 V
BUS
+5 V
2 D– (not used with nanoLOC TN100 board)
3 D+ (not used with nanoLOC TN100 board)
4 NC
5 GND
Table 6. RS-232 connector (CN5) pin description
Pin Connector pin
1 Optionally connected to pins 4, 6 if R32 assembled
2 TX/RX (see Figure 10 , Table 7 )
3 RX/TX (see Figure 10 , Table 7 )
4 Connected to pin 6
5 GND
6 Connected to pin 4
7 Connected to pin 8
8 Connected to pin 7
9 NC
AM00266
5 4 3 2 1
9 8 7 6
AM00264
2 4
1 3