RF620T
RF620R
SmartRadio Transmitter / Receiver
RF620R - Pin Description
Pin No
Name
Vcc-RF
GND-RF
ANT
Description
+5V Supply Voltage – RF section.
RF Ground.
1
2
Connect Antenna to this input.
RF Ground.
3
7
GND-RF
GND-AF
RSSI
AF Ground.
11
13
14
15
16
Received Signal Strength Indicator (RSSI)
Raw Data output from RF receiver (CMOS/TTL signal)
+5V Supply Voltage – digital section.
AF Ground – digital section.
O/P-AF
Vcc-digital
GND-digital
Pulls Microcontroller into reset if connected to Ground
May be left unconnected if not required (internally tied high)
17
MCLR
Serial data output, active low
19
20
\Serial Data
\RTS
/RTS input, active low
Dual function:
Programming Switch input, When grounded places the module into ‘learn’ mode.
External LED output, Indicates data reception, and programming status.
\Learn
&
\LED
21
leave unconnected
22
23
24
25
spare
spare
O/P1
O/P2
leave unconnected
Data Output 1. (has a 220Ω series resistor)
Data Output 2. (has a 220Ω series resistor)
RF620R - Typical application circuit
LED drive example
470R
O/P 2
O/P 1
RF620R
1
3
7
11
15
20
22
25
Vcc
1k
Status
LED
Vcc
RTS input
Serial data output,
CMOS/TTL Level
Learn Switch
GND
DS620-3 Jan ‘07
©2007 Reg. No. 227 4001, ENGLAND
Page 3
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