ER400RS EASY RADIO, ER400RS Datasheet - Page 8

MODULE, RX, FM, 433MHZ

ER400RS

Manufacturer Part Number
ER400RS
Description
MODULE, RX, FM, 433MHZ
Manufacturer
EASY RADIO
Datasheet

Specifications of ER400RS

External Depth
4mm
External Length / Height
14mm
External Width
37mm
Frequency
433MHz
Operating Temperature Max
65°C
Operating Temperature Min
-20°C
Rf Sensitivity
-105dBm
Range
250m
The host should check before sending data that the ‘Busy’ line is not high, as this would indicate that the
transceiver is either transmitting or receiving data over the radio link. It should also pull the ‘Host Ready’ line
low and check that no data appears on the Serial Data Output line.
Detailed operation of interfacing, handshaking (including timing) is described in the ‘Easy-Radio Software
Guide’.
Timing Specifications – Applies to all Easy-Radio Modules.
Notes
LPRS Data Sheet
Parameters
Host Serial Input/Output
Host Character Format
End of Data Delay
RF Transmit
Buffer Size
Easy -Radio ER400TS, ER400RS & ER400TRS 1-1.doc
1. Data is inverted i.e. Start Bit is logic low. The inputs are intended for direct connection to a
2. 1 start, 8 data, 1 stop = 10 bits @ 104uS/bit = 0.52mS/character at 19200 Baud. (Default)
3. The ‘End of Data’ delay is fixed at twice the character time.
4. A fixed package overhead of 13.2mS is added to all packets.
5. The buffer size is limited to 128 bytes. Sending more than 128 bytes will cause loss of data.
microcontroller UART or to RS232 inputs and outputs via an RS232 Level translator such as a
Maxim MAX232 which invert the logic of the RS232 signals. This allows direct connection to, for
example a PIC UART. The data rate is user programmable (Default 19200 baud) and may differ
between individual units within a system. (See Application Circuit diagram for logic level to
RS232 interface figure 11, page 13).
Easy -Radio ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver
1 Start, 8 Data, No Parity, 1 Stop
2400, 4800, 9600, 19200, 38400
2 x BAUD BYTE Duration
13.2 + (n Bytes X 0.8)
1-128
Min
Copyright LPRS 2003. March2004
Bytes
Units
baud
Bits
mS
mS
Notes
1
2
3
4
5
Page 8 of 15

Related parts for ER400RS