Application circuits
4.2-16V
RX
3V
re gula tor
RSSI (1a )
Vdd
Vss
ADC
TXD
RF GND
1k
Ω
Vc c (2a )
TXD (3a )
AF (4a )
1kΩ
Te st point
RXD (5a )
TXE (6a )
PGM (7a )
RXD
1
6
2
TX/RX
TX
1k
7
3
TXD
8
4
9
5
Ω
0V (1b)
S0 (2b)
S1 (3b)
S2 (4b)
Pa ra lle l
Cha nne l
Se le c t
SGD
Figure 4: SMX1 interfaced to host microcontroller and serial port for configuration
5 - 16V
2K2
(for 5V)
RSSI (1a )
Vc c (2a )
RF GND
TXD (3a )
AF (4a )
PC se ria l port
MOD RXD (5a )
MOD TXD (6a )
PGM (7a )
1200 bps
1
2
6
7
8
9
RXD
TXD
2400 bps
SETMOD
SW1
SMX1
3
0V (1b)
S0 (2b)
S1 (3b)
S2 (4b)
4
5
SGD
Figure 5: SMX1 interfaced to PC serial port (0V / 5V RS232 level)
5 - 16V
16 (+ 5V)
2K2
(for 5V)
MAX232
5K
RSSI (1a )
Vc c (2a )
RF GND
TXD (3a )
AF (4a )
PC seria l port
MOD RXD (5a )
MOD TXD (6a )
PGM (7a )
1200 bps
1
6
2
RXD
7
SW1
SMX1
3
TXD
0V (1b)
S0 (2b)
S1 (3b)
S2 (4b)
8
9
4
5
SGD
Figure 6: SMX1 interfaced to serial port (+10V / -10V RS232 level)
Radiometrix Ltd
SMX1 Data Sheet
page 7
RADIOMETRIX [ RADIOMETRIX LTD ]
