RLC2

EW N Issue 4, 27 July 2005 Radiometrix Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233 TLC2/RLC2 UHF Narrow Band FM Low Cost multi channel radio modules UHF multi The TLC2 transmitter RLC2 receiver modules offer a low power, reliable data link in an industry-standard pin out and footprint. This makes the TLC2/RLC2 pair ideally suited to those low power applications where existing wideband modules have insufficient range, or where low cost multi-channel operation is needed without compromising on RF specification or regulatory requirement. Figure 1: RLC2 receiver, TLC2 transmitter Features • • • • • • • • • 433MHz version conforms to EN 300 220-3 and EN 301 489-3 High performance double superhet. PLL synthesizer with TCXO SAW front-end filter Data rates up to 5 kbps for standard module Usable range over 500m Fully screened. Low profile Feature-rich interface (RSSI, analogue and digital baseband) Re-programmable via RS232 interface Low power requirements Applications • • • • • • • • • Handheld terminals EPOS equipment, barcode scanners Data loggers Industrial telemetry and telecommand In-building environmental monitoring and control High-end security and fire alarms DGPS systems Vehicle data up/download Heavy vehicle/machinery controls Technical Summary • • • • • • • • • Operating frequency: 433.875-434.650MHz Any custom frequency on 433MHz – 435MHz 32 channels in 433MHz band Transmit power: +10dBm (10mW) Supply range: 4.0 - 15V (TLC2), 1.8 - 10V (TLC2LV) 3.7 - 15V (RLC2) Current consumption: 32mA (TX), 18mA (RX) Data bit rate: 5kbps max. (standard module) Receiver sensitivity: -120dBm (for 12 dB SINAD) Serial configuration by inverted RS232 at 3V CMOS level Radiometrix Ltd TLC2/RLC2 Data Sheet page 1 Radiometrix Ltd TLC2/RLC2 Data Sheet Figure 2: TLC2 block diagram page 2 Figure 3: TLC2 footpint (top view) Pin description – TLC2 Pin 1 2 3 4 5 P0/PGM P1 P2 P3 Jumper P4 Name Vcc No pin TXD No pin 0V Parallel channel select, bit 0 Parallel channel select, bit 1 Parallel channel select, bit 2 Parallel channel select, bit 3 Parallel channel select, bit 4 (MSB) Function power supply : 4 – 15V (TLC2) and 1.8 – 10V (TLC2LV) Not present TLC2: DC coupled input for 3V CMOS logic. Rin=100kΩ TLC2LV: DC coupled input for CMOS logic5. Rin=47kΩ Not present Ground True logic (0V = low). Weak pullup to 3V; Serial frequency programming / configuration1 True logic (0V = low). Weak pullup to 3V True logic (0V = low). Weak pullup to 3V True logic (0V = low). Weak pullup to 3V Jumper soldered, P4=0 (Channel 00 – Channel 15 at 50kHz step) Jumper clear, P4=1 (Channel 16 – Channel 31 at 50kHz step) 1. Serial programming is by an inverted 2400 baud RS232 at 3V CMOS level command into the PGM. If connection to a true RS232 port is desired, then a suitable inverting level shifter / buffer (MAX232 or NPN switch transistor) is needed. 2. Parallel channel selection is by a true logic (0V=0, 3V=1), 4-pin parallel input (MSB selected by jumper). 3. Channel select inputs have 10kΩ weak internal pull-up to 3V internal rail. Do not exceed 3V logic levels on this port. 4. TLC2LV will shutdown if Vcc falls below 1.6V 5. TXD (TLC2LV): logic low < 1.3V, logic high > 1.7V. TXD maximum voltage = 10V Radiometrix Ltd TLC2/RLC2 Data Sheet page 3 Radiometrix Ltd TLC2/RLC2 Data Sheet Figure 4: RLC2 block diagram page 4 Figure 5: RLC2 footpint (top view) Pin description – RLC2 Pin 1 2 3 4 5 P0/PGM P1 P2 P3 Jumper P4 Name Vcc RSSI 0V RXD AF Parallel channel select, bit 0 Parallel channel select, bit 1 Parallel channel select, bit 2 Parallel channel select, bit 3 Parallel channel select, bit 4 Function DC supply (3.7V to 15V, at 18mA). 0.5V-2.5V DC level. 60dB dynamic range. 40kΩ output impedance Ground Open collector digital data output with internal 47kΩ pull-up to Vcc 600mV pk-pk audio. DC coupled, approx 0.8V bias. True logic (0V = low). Weak pullup to 3.5V Serial frequency programming / configuration1 True logic (0V = low). Weak pullup to 3.5V True logic (0V = low). Weak pullup to 3.5V True logic (0V = low). Weak pullup to 3.5V Jumper soldered, P4=0 (Channel 00 – Channel 15 at 50kHz step) Jumper clear, P4=1 (Channel 16 – Channel 31 at 50kHz step) NOTES: 1. Serial programming is by a 2400 baud inverted 'RS232' (3V CMOS levels) datastream applied to the P0 pin. If connection to a true RS232 port is desired, then a suitable inverting level shifter / buffer (MAX232 or NPN switch transistor) is needed. 2. Parallel channel select is by a 4 pin parallel input (MSB selected by jumper). 3V CMOS levels should be used. 3. As supplied the frequency table is thus: ch 0-15 433.875 – 434.625 MHz (50KHz steps) ch 16-31 433.9 - 434.65 MHz (50KHz steps) Radiometrix Ltd TLC2/RLC2 Data Sheet page 5 Serial interface commands 2400 baud RS232. 8 bit data, no parity, 1 start bit, 1 or 2 stop bits. Serial data is sent to the unit on one of the parallel channel select pins (P0). It is very important that the unit does not ‘decode’ switch bounce in ordinary operation as a command string, or spurious rewriting of the EEPROM will result. For this reason the user must send the 16 character string ENABLESERIALMODE to fully enable the serial command mode before sending any of the command strings listed below. Command mode is disabled on power down, or on reception of a # character. GOCHAN xx LOAD aa nnnnn SETPAR SETSER RVALUE rrrr SINGLE nnnnn / # Serially select of channel xx, where xx is 0 to 31 Set value of N register for channel aa, where aa is Channels 0 to 31 Channel selected by 5 bit parallel inputs (4pins + jumper) Channel selected by most recent GOCHAN operation Set value for R register Set value of N for single channel operation. N value NOT stored in EEPROM Process entry Clear all buffers Disable command mode xx = a channel number from 00 to 31 aa = a two digit channel number from 00 to 31 nnnnn = synthesizer N register value (up to 65535) rrrr = synthesizer R register value (up to 16383) N TX = f RF f Channelspacing = 433.875MHz = 17355 25kHz R= f TCXO f channelspacing = 13MHz , So R=520 25kHz N RX = f RF − 21.4MHz 433.875MHz − 21.4 = = 16499 f Channelspacing 25kHz Note: A pause of at least 25ms must be allowed between command strings (EEPROM programming time). SINGLE mode does not store the N value in EEPROM. Therefore the unit is inoperative after a power down until either another valid SINGLE command is received, or mode is changed by a GOCHAN, SETPAR or SETSER command. SINGLE mode is intended for frequency agile applications. Radiometrix Ltd TLC2/RLC2 Data Sheet page 6 TLC2, RLC2 channels are spaced at 50kHz interval into two frequency groups. 50kHz spacing between sequential channels minimises adjacent channel interference. P4 jumper link determines which frequency group is selected. Channel (P4 soldered) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Frequency (MHz) 433.875 433.925 17 433.975 18 434.025 19 434.075 20 434.125 21 434.175 22 434.225 23 434.275 24 434.325 25 434.375 26 434.425 27 434.475 28 434.525 29 434.575 30 434.625 31 434.650 434.600 434.550 434.500 434.450 434.400 434.350 434.300 434.250 434.200 434.150 434.100 434.050 434.000 433.950 Channel (P4 clear) 16 Frequency (MHz) 433.900 Radiometrix Ltd TLC2/RLC2 Data Sheet page 7 Condensed specifications Frequency Peak deviation Frequency stability Channel spacing Number of channels Operating temperature Spurious radiations Transmitter Output power TX on switching time Modulation type TX modulation bandwidth Adjacent channel TX power TX spurious Supply Voltage Current 433.875-434.675MHz (custom variants on 433MHz – 435MHz) ±3kHz ±1.5kHz 25kHz (12.5kHz by special order) 32 channels selected via RS232 interface or 2 x 16 groups by parallel port -10 ºC to +60 ºC (Storage -30 ºC to +70 ºC) Compliant with ETSI EN 300 220-3 and EN 301 489-3 +10dBm (10mW) ±1dB (1mW or 5mW by special order) 50ms from power up FSK (F3D) DC – 5kHz (3V CMOS compatible)