• • • • • IC1003 Provides RF Uart Functions, 12 Bit Symbols to Serial TX And Serial RX to 12 bit Symbols with Start Symbol Detection Supports data rates from 100Kbps to 1Mbps Allows unsquelched receiver operation for improved sensitiviy Compatible with RFM’s TR-Series ASH transceivers RF Uart IC The IC1003 RF Uart IC detects a start-of-data pulse sequence and then provides clocking pulses in the middle of each following data bit. The IC1003 is designed to support a host protocol processor which can be in sleep mode until interrupted into active operation by the start-of-data detect pulse. The IC1003 is compatible with RFM's 2nd generation ASH transceivers and receivers and allows these radios to operate with no threshold for improved system sensitivity. Absolute Maximum Ratings Please refer to the latest revision of Xilinx data sheet for the XC9572-7VQ64 Characteristic Supply Voltage Supply Current At 40Mhz Clock(1Mbs Data) Logic Low Input Logic High Input Logic Low Output Logic High Output Supported Data Rates: Sym VDD IDD Notes VIL VIH VOL VOH Transmitted Bit Rate Tolerance Operating Temperature Range RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Minimum 3.0 Typical Maximum 3.5 Units V mA 0.8 0.2 VDD - 0.7 0.6 100 1000 VDD VDD V V Kbps -40 ±1 85 % °C 48 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 1 of 11 RF Uart IC1003 Operation A typical IC1003 application the RX Data output from the 2nd generation ASH transceiver (or receiver) is applied to the IC1003. In receive mode the IC1003 detects the presence of a specific unique Start Symbol sequence and outputs a Start Detect. The IC1003 generates data clocking (data valid) and shifts the data into a 12 bit shift register and will rise the data Ready pin when a Symbol is ready to be read. After the packet is received the Start Detect Signal must be reset by Start Detect reset pin going high. The IC1003 used as an transmitter interface will write in a 12 bit symbol and while TX Enable is high will shift out the data out the data out pin at the Clock Frequency dived by 40(40Mhz clock will obtain a 1Mbps data rate). The IC1003 supports data rates from 100K – 1000K bits per second (bps).. The IC1003 is implemented in an industrial temperature range of Xilinx data sheet for the XC9572-7VQ64 CPLD. Please refer to the latest revision of Xilinx data sheet for detailed electrical and mechanical specifications. Start-of-Data Pulse Sequence Generation The IC1003 start-of-data pulse sequence is a steady High pulse of eight bit periods, followed by a sequence of eight bits in an alternating high-low-high-low… pattern. This pulse sequence is very unlikely to occur in a stream of white noise (data sliced), providing good false triggering performance. The IC1003 outputs the Start Detect pulse when the RX Data input line to the IC1003 has remained a steady low for eight bit periods. After eight bit periods of a steady high, the data input should begin the eight-bit sequence of alternating high and low bits. The eight-bit alternating high-low sequence provides data clocking alignment training under low signal-to-noise conditions (data edge jitter) and should be used for best results. RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Note that the ASH radio RX Data output signal is inverted before being applied to the IC1003. The steady high pulse that begins the start-of-data pulse sequence to the IC1003 is generated by the reception of an eight-bit long RF transmission. This pulse also helps "train" the base-band coupling capacitor in the ASH radio for best data slicer noise rejection. The host processor should generate inverted data for transmission by the ASH radio and should input the same inverted data that drives the IC1003. Data Encoding Data should be encoded to provide frequent logic state transitions (edges) to facilitate data clock alignment, and should exhibit good dynamic DC-balance (50% high bits and 50% low bits over any interval of 16 bits or less) to maintain the radio's base-band capacitor training for best noise performance. The popular encoding method is byte-to-12 bit symbolizing, which encodes each byte as a pattern of 12 bits, always with six one bits and six zero bits. Symbolizing requires fewer bits than Manchester to encode a message, and also provides frequent state transitions and good DC-balance. An example of 12-bit symbolizing can be found in page 4. Note that the IC1003 has no provisions for detecting end-ofdata. This provides flexibility in message length and data encoding, but requires the message length and/or an end-ofdata symbol to be embedded in the data by the user and Start Symbol Reset brought high will clear Start Symbol Detect. Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 2 of 11 RF Uart IC1003 Pin Name Pin TX Data 0 31 TX Data 1 47 TX Data 2 5 TX Data 3 8 TX Data 4 10 TX Data 5 6 TX Data 6 16 TX Data 7 17 TX Data 8 59 TX Data 9 4 TX Data 10 49 TX Data 11 56 TX Write/ 32 TX Enable 57 RX Data 0 40 RX Data 1 39 RX Data 2 38 RX Data 3 36 RX Data 4 35 RX Data 5 34 RX Data 6 33 RX Data 7 18 RX Data 8 42 RX Data 9 62 RX Data 10 50 RX Data 11 22 RX Read/ 11 Data Ready 44 TX Busy 43 Start Detect 60 Start Detect Reset 7 RX Enable 58 TX OUT 19 RX IN 2 Reset 64 Clock in 15 RF Monolithics, Inc. RFM Europe Discription Data bit 0 of Transmit Symbol, true data Data bit 1 of Transmit Symbol, true data Data bit 2 of Transmit Symbol, true data Data bit 3 of Transmit Symbol, true data Data bit 4 of Transmit Symbol, true data Data bit 5 of Transmit Symbol, true data Data bit 6 of Transmit Symbol, true data Data bit 7 of Transmit Symbol, true data Data bit 8 of Transmit Symbol, true data Data bit 9 of Transmit Symbol, true data Data bit 10 of Transmit Symbol, true data Data bit 11 of Transmit Symbol, true data Transfers TX Data to shift register on falling edge of high to low Enables serial data out to TR1100 Data bit 0 of Receive Symbol, true data Data bit 1 of Receive Symbol, true data Data bit 2 of Receive Symbol, true data Data bit 3 of Receive Symbol, true data Data bit 4 of Receive Symbol, true data Data bit 5 of Receive Symbol, true data Data bit 6 of Receive Symbol, true data Data bit 7 of Receive Symbol, true data Data bit 8 of Receive Symbol, true data Data bit 9 of Receive Symbol, true data Data bit 10 of Receive Symbol, true data Data bit 11 of Receive Symbol, true data Transfers RX Data to Output register on falling edge of high to low Receive Symbol Read, cleared by RX Read/, Active High TX Buffer Full, Active High Start Symbol Detected, cleared by Start Symbol Reset, Active High Start Symbol Rest, Active High Enables Start Symbol Detection, Active High TX Serial Data output TR1100, Active High RX Serial Data input TR1100, Active High Reset, Active Low Clock In, valid speeds of 8Mhz to 40Mhz, Clock in ÷ 40 = Baud Rate 40Mhz = Data Rate of 1Mbs, 20Mhz = Data Rate of 500Mbs 10Mhz = Data Rate of 250Kbs Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 3 of 11 RF Uart IC1003 DC balanced Symbols Nibble 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Hex value 0x15 0x31 0x32 0x23 0x34 0x25 0x26 0x16 0x1A 0x29 0x2A 0x0B 0x2C 0x0D 0x0E 0x1C Binary Value 010101 110001 110010 100011 110100 100101 100110 010110 011010 101001 101010 001011 101100 001101 001110 011100 Start Symbol: Bit Posion Symbol 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 1 1 1 1 1 1 1 1 0 Preamble Symbol: Bit Posion Symbol 11 10 9 8 7 6 5 4 3 2 1 0 1 0 1 0 1 0 1 0 1 0 1 0 A 12 bit Symbol for a hex 31 would look like: Bit Posion Symbol RF Monolithics, Inc. RFM Europe 11 10 9 8 7 6 5 4 3 2 1 0 1 0 0 0 1 1 1 1 0 0 0 1 Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 4 of 11 RF Uart IC1003 Start Symbol Detect Start Detect Data In Clock Start Symbol: Bit Posion Symbol RF Monolithics, Inc. RFM Europe 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 1 1 1 1 1 1 1 1 0 Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 5 of 11 RF Uart IC1003 TX Busy, TX Write/ Data In TX Busy TX Write/ RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 6 of 11 RF Uart IC1003 Start Detect, RX Data, Data Ready & RX Read/ Start Detect RX Data Data Ready RX Read/ RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 7 of 11 RF Uart IC1003 Start Detect. RX Data, Data Ready, Start Detect Reset Start Detect RX Data RX Data Ready Start Detect Reset RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 8 of 11 RF Uart IC1003 TX Busy, TX Write, TX Data Output TX Write TX Busy TX Data Output Start Detect (at Receiver) RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 9 of 11 RF Uart IC1003 TX Busy, TX Write, TX Data, Start Detect TX Write/ TX Busy TX Data Output Start Detect at Receiver RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 10 of 11 RF Monolithics, Inc. RFM Europe Phone: (972) 233-290 Phone: 44 1963 251383 Fax: (972) 387-8148 Fax: 44 1963 251510 ©1999 by RF Monolithics, Inc. The stylized RFM logo are registered trademarks of RF Monolithics, Inc. E-mail: [email protected] http://www.rfm.com IC1003-050103 Page 11 of 11