Figure 3: COR3 Flat mounted footprint
Pin Description - COR3
Pin
1A
2A
Name
RF in
RF GND
Function
50Ω RF input from antenna
RF ground, internally connected to the module screen and pin 2 (0V)
1
2
3
4
5
RSSI
GND
Vcc
AF
RXD
DC level between 0.5V and 2.5V. 60dB dynamic range
Ground (0V)
Supply input 4.5V – 15V DC
700mV p-p audio. DC coupled, approx 1V bias
Open collector output of data slicer suitable for Bi-phase codes
Requires external pull-up resistor to required output voltage level
Parallel Channel select LSB
6
P0/PGM
Serial frequency programming / configuration1
Parallel Channel select
7
8
9
P1
P2
P3
Parallel Channel select
Parallel Channel select MSB
Notes:
1. There is no pull-up on the open collector RXD output.
2. P0-P3 are inverted parallel frequency select inputs. They have 10k pullups to 4.4V
3. P0 requires a 4.4V level UART (inverted RS232) serial command strings for programming
4. A version of the LMR2 firmware is used (so most variants of the LM_series will also be
possible for the COR3
5. Two pinout versions are offered: With conventional pins, out of the bottom of the unit (flat
mount) and with right-angle pins, to allow 'SIL' vertical mounting.
6. The actual pinout and footprint follows the NRX1/NRX2 type radio, with the addition of P0-
P3
Radiometrix Ltd, COR3 Data Sheet
page 3
RADIOMETRIX [ RADIOMETRIX LTD ]
