Linx Technologies SDM-USB-QS-S - Manual (Page 9)

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PDN
RSSI
DATA
AUDIO
AREF
NC
NC
NC
NC
NC 1
8 9
10
11
12
13
14
15
16
GND
VCC
USBDP
USBDM
GND
DSR
DATA_IN
DATA_OUT
RTS
CTS
DTR
TX_IND
VCC
SUSP_IND
RX_IND
485_TX
RI
DCD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
5V
DAT -
DAT+
GS
HD
GS
HD
GND GND
2
3
4
5 6
GND
SDM-USB-QS-S
RXM-XXX-ES
VCC 220
ANT
GND
LVL ADJ
PDN
/CLK DATA
GND
LOW V DET
/CLK SEL
9
10
TXM-XXX-ES
1
2
3
4
5
6
7
8
USBDP
USBDM
GND
DSR
DATA_OUT
RTS
CTS
DTR
TX_IND
VCC
SUSP_IND
RX_IND
485_TX
RI 1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
USB Type B
Connector
5V
DAT -
DAT+
GND
GS
HD
GS
HD
GND
5 6
GND
SDM-USB-QS-S
VCC
VCC 220
USB Type B
Connector
Figure 13: Wireless Modem Using ES Series RF Modules
TX Side RX Side
Figure 14 below shows the QS module connected to a microprocessor.
This is the design used in the QS Master Development Kit and the
documentation for the kit describes the connections and software.
USBDP
USBDM
GND
DSR
DATA_IN
DATA_OUT
RTS
CTS
DTR
TX_IND
VCC
SUSP_IND
RX_IND
485_TX
RI
DCD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
USB Type B
Connector
5V
DAT -
DAT+
GND
GS
HD
GS
HD
1
2
3
4
5 6
SDM-USB-QS-S
VCC
RA2/AN2
1
RA3/AN3
2
RA4/AN4
3
MCLR/VPP
4
GND
5
RB0/INT
6
RB1
7
RB2/RX
8
RB3
9
RB4
10
RB5/TX
11
RB6
12
RB7
13
VCC
14
RA6
15
RA7
16
17
RA1/AN1
18
PIC16F88
220
220
220
SW-PB
VCC
200K
VCC
220
220
10K
VCC
220
220
Typical Applications
There are many potential uses for the QS Series modules, three of which
will be described here. Figure 12 shows the QS and a MAX213 RS-232
level converter IC from Maxim. This creates a USB-to-RS-232 converter
that supports all of the standard handshaking lines. Similarly, RS-485 or
RS-422 level converter chips could be used for designs requiring those
standards.
The QS Series modules can be used with Linx RF modules to create a
wireless link between two PCs. Figure 13 shows a design using the ES
Series RF modules. An option not shown in the schematic below is that
one of the output lines of the QS module (RTS or DTR) could be connected
to the PDN lines of the RF modules, enabling the host to turn the RF
modules on and off.
+
5k
R1
T1
400k
VCC
T2
400k
VCC
T3
400k
VCC
T4
400k
VCC
5k
R2
5k
R3
5k
R4
5k
R5
7 T1 IN T1 OUT 2
3 6 T2 IN T2 OUT
T3 OUT T3 IN 20 1
28 21 T4 IN T4 OUT
R1 OUT R1 IN 8 9
4 5 R2 OUT R2 IN
R3 IN R3 OUT 26 27
23 22 R4 OUT R4 IN
R5 IN R5 OUT 19 18
GND SHDN
24 EN
+10V TO -10V
VOLTAGE INVERTER
+5V TO =10V
VOLTAGE DOUBLER
16
15 C2+
C2-
0.1uF
16V
+
14
12 C1+
C1-
0.1uF
6.3V
+ 0.1uF
+ 13
0.1uF
6.3V
+
0.1uF
16V
17
VCC
11
V+
V-
+5V INPUT
10
25
GND SHDN
EN
C2+
C2-
C1+
C1-
VCC
V+
V- +
16
15
0.1uF
16V
+
14
12
0.1uF
6.3V
+ 0.1uF
+
13
0.1uF
6.3V
11
+
0.1uF
16V
17
24
10
25
T1 IN T1 OUT
7 2
T2 IN T2 OUT
3 6
T3 OUT T3 IN
20 1
28
21 T4 IN T4 OUT
R1 OUT R1 IN
8 9
R2 OUT R2 IN
4 5
R3 IN R3 OUT
26 27
R4 OUT R4 IN
23 22
R5 IN R5 OUT
19 18
VCC
DSR2
DCD2
TX DATA2
RI2
DTR2
RTS2
RX DATA2
CTS2
DSR
DCD
TX DATA
RI
DTR
RTS
RX DATA
CTS
MAX213
SUSP_IND
VCC
DCD2
DSR2
RTS2
CTS2
DTR2
RI2
TX DATA2
RX DATA2
1
2
3
4
5
6
7
8
9
DB9M
USBDP
USBDM
GND
DSR
DATA_IN
DATA_OUT
RTS
CTS
DTR
TX_IND
VCC
SUSP_IND
RX_IND
485_TX
RI
DCD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
USB Type B
Connector
GND
5V
DAT -
DAT+
GND
GS
HD
GS
HD
GND GND
1
2
3
4
5 6
GND
SDM-USB-QS-S
VCC
220 220
DSR
DCD
TX DATA
RI
DTR
RTS
RX DATA
CTS
SUSP_IND
Figure 12: RS-232 to USB Converter
Figure 14: Interface with a Microprocessor