Texas Instruments TRS3221RGTEVM, Руководство пользователя

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5 4 3 2 1
9 8 7 6
GND DTR
DSR
TX1 RX1
NC
NC
NC NC
Figure 3-2. Female DB9 Connector Pinout
The pin connection of 16-pin jumper connector is listed in Table 3-3 , which provides access to the TRS3221
device communication pins as well as control, output, and power pins. Pin 2 connects to the INVALID pin, which
has the function described by the
Table 3-4 . Pin 10 connects to the FORCEOFF pin, and Pin 4 connects to the
FORCEON pin. Please see the Table 3-5 and the Table 3-6 for pin functions.
Table 3-3. J2 jumper pin connection
Connection Type Description
1 GND Ground
2 Output INV, pin 7 of transceiver
3 GND Ground
4 Input ON, pin 9 of transceiver
5 GND Ground
6 Output TX2, pin 6 of transceiver
7 GND Ground
8 Input RX2, pin 8 of transceiver
9 GND Ground
10 Input OFF, pin 13 of transceiver
11 GND Ground
12 Input EN, pin 14 of transceiver
13 GND Ground
14 Power Vcc
15 GND Ground
16 GND Ground
Table 3-4. INVALIDPin Function
INPUTS
(1)
OUTPUT
RIN FORCEON FORCEOFF EN INVALID
L X X X H
H X X X H
Open X X X L
(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
Table 3-5. Driver Function Table
INPUTS
(1)
OUTPUT
DRIVER STATUS
DIN FORCEON FORCEOFF
VALID RIN RS-232
LEVEL
DOUT
X X L X Z Powered off
L H H X H
Normal operation with
automatic power down disabled
H H H X L
L L H Yes H
Normal operation with
automatic power down enabled
H L H Yes L
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SLLU328 – DECEMBER 2020
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