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SPM2-433-18-3V Datasheet(PDF) 5 Page - Radiometrix Ltd |
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SPM2-433-18-3V Datasheet(HTML) 5 Page - Radiometrix Ltd |
5 / 15 page Radiometrix Ltd, SpacePort Modem page 5 2 THE HOST INTERFACE 2.1 SIGNALS The connection to the SPM is a full duplex serial interface supporting baud rates from 600bps to 115200bps. Additional control signals are provided to assist in flow control, configuration and power saving in the SPM. Figure 3 shows an overview of the interface signals to the SPM. Pin name Pin Pin Function In/Out Description RF GND 1, 3 RF signal ground BNC casing/coax braid connection RF 2 RF signal Input or Output Antenna pin/coax core connection RXSELCT 4 Receiver Select Input or Output Manual RF Receiver Enable or RF Receiver Active Indicator TX SELECT 5 Transmitter Select Input or Output Manual RF Transmitter Enable or RF Transmitter Active Indicator TXD/AF 7 Transmitted Data or demodulated signal Input or Output Transmitted Packetised Data to BiM2 Analogue Demodulated signal from BiM2 D3 8 SP2 Data line NC Internal data line between RPM and FRPC D2 9 SP2 Data line NC Internal data line between RPM and FRPC SIGNAL 10 Preamble Detect Output Valid preamble indicator RST 11 FRPC reset NC Resets FRPC which also isolates BiM2 RXA 12 Receive Acknowledge NC Host to FRPC download request acknowledge RXR 13 Receive Request Output Valid Data packet indicator RESET 14 Reset Input Hardware reset of the SPM SETUP 15 Enter Setup Input Enter SPM configurator after a reset WAKE/DTR 16 Wake or Shutdown Input Wakes SPM when low, shuts down when high TXD 17 Serial transmitted data Input Host (DTE) to SPM serial data RXD 18 Serial Received data Output SPM to host (DTE) serial data CTS 19 Flow control Output SPM to Host (DTE) flow control DEFAULT 20 Force 9600bps Input Force the SPM serial interface to 9600bps VCC 21 Vcc Supply Input +5VDC GND 6, 22 Ground - Ground internally connected to RF GND notes: 1. RXD/TXD lines are true data 2. The 4 input control lines are active low 3. Logic levels are 5V CMOS. See electrical specifications 4. Input control pins must be terminated, as pull-ups are not provided 5 Indicator outputs are active low which can be connected to LEDs 2.2 SPACEPORT RESET RESET The Reset signal may either be driven by the host (recommended) or pulled up to Vcc via a suitable resistor (10k Ω). A reset aborts any transfers in progress and restarts the SPM. HOST DRIVEN RESET Minimum low time: 1.0 µs, after reset is released (returned high). The host should allow a delay 1ms after reset for the SPM to initialise itself. TX Select Fast Radio Packet Controller (FRPC) BiM2 UHF Transceiver SPACEPORT MODEM RX Select TXD RXD RESET DEFAULT SETUP CTS/DSR TXD RXD Radio Packet Modem (RPM) Host µµµµcontroller D0 D1 D2 D3 TXA RXR RXA RST TXR SIGNAL WAKE/DTR Figure 3: Host to SPM connection |
Similar Part No. - SPM2-433-18-3V |
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Similar Description - SPM2-433-18-3V |
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