FX829D2 CMLMICRO [CML Microcircuits], FX829D2 Datasheet
FX829D2
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FX829D2 Summary of contents
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CML Semiconductor Products Baseband Signal Processor 1.0 Features Rx Audio Processing Tx Audio Processing 1200/2400 Baud Modem DTMF Encoder 1.1 Brief Description The FX829 is a low voltage CMOS integrated circuit, designed to provide the baseband audio and system signal-processing ...
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Baseband Signal Processor Section 1.1 Brief Description.........................................................................................1 1.2 Block Diagram ............................................................................................3 1.3 Signal List ...................................................................................................4 1.4 External Components.................................................................................7 1.5 General Description....................................................................................8 1.5.1 Software Description ..................................................................9 1.5.2 FFSK Checksum Generation and Checking ............................18 1.6 Application Notes .....................................................................................20 1.7 Performance Specification.......................................................................25 1.7.1 ...
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Baseband Signal Processor 1.2 Block Diagram 1997 Consumer Microcircuits Limited Figure 1 Block Diagram 3 FX829 D/829/4 ...
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Baseband Signal Processor 1.3 Signal List Package Signal D2/D5 Pin No. Name 1 XTALN 2 XTAL/CLOCK 3 SERIAL CLOCK 4 COMMAND DATA 5 REPLY DATA 6 CSN 7 IRQN 8 CARRIER DETECT 1997 Consumer Microcircuits Limited Description Type O/P The ...
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Baseband Signal Processor 1.3 Signal List (continued) Package Signal D2/D5 Pin No. Name 9 CARDCAP 10 V BIAS 11 MIC DEMODIN 14 DEMODFB 15 FILTER OUT 16 FFSK/DTMFOUT 17 SUM IN 18 SUM OUT 19 MOD1 ...
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Baseband Signal Processor 1.3 Signal List (continued) Package Signal D2/D5 Pin No. Name 23 MOD2 Notes: I/P = Input O/P = Output 1997 Consumer Microcircuits Limited Description Type O/P Output of MOD2 audio gain control. Power The ...
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Baseband Signal Processor 1.4 External Components C1 22pF ±20% C2 22pF ±20% C3 68pF ±20% C4 0.1µF ±20% C5 0.1µF ±10% C6 100pF ±20% C7 0.1µF ±20% C8 Note 2 ±20% C9 5.6nF ±20% Notes: 1. R2, R3, R4 and ...
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Baseband Signal Processor 1.5 General Description The FX829 consists of five main sections: the audio filter section, the programmable attenuators, the DTMF encoder, the FFSK transmitter and the FFSK receiver. All these sections are controlled via a serial ("C-BUS") interface. ...
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Baseband Signal Processor 1.5.1 Software Description Address/Commands Instructions and data are transferred, via "C-BUS", in accordance with the timing information given in Figure 11. Instruction and data transactions to and from the FX829 consist of an Address/Command (A/C) byte followed ...
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Baseband Signal Processor REGISTER NAME CONTROL 1 CONTROL 2 CONTROL 3/IRQ ENABLE AUDIO ATTENUATION TXDATA MOD LEVELS (1) MOD LEVELS (2) RX SYNC WORD (1) RX SYNC WORD (2) STATUS RXDATA CONTROL1 Register (Hex address $10) This register is used ...
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Baseband Signal Processor MIC When this bit is "1", the MIC input is enabled and the AMP1 (DEMODIN) input is (Bit 1) disabled. When this bit is "0", the AMP1 (DEMODIN) input is enabled and the MIC input is disabled. ...
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Baseband Signal Processor 1997 Consumer Microcircuits Limited Figure 3 Checksum Generation in Tx Mode Figure 4 Checksum Calculation in Rx Mode 12 FX829 D/829/4 ...
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Baseband Signal Processor DTMFEN When this bit is "1", the DTMF output is enabled. (Bit 6) When this bit is "0", the DTMF output is disabled. As the powersave of the DTMF is performed in the DTMFHI and DTMFLO registers, ...
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Baseband Signal Processor AUDIO ATTENUATION Register (Hex Address $13) The five least significant bits in this register are used to set the attenuation of the audio volume control according to the table below Audio Attenuation ...
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Baseband Signal Processor TXIDLEM When this bit is "1", the TXIDLE interrupt will be gated out to the IRQN pin. (Bit 5) When this bit is "0", the TXIDLE interrupt will be inhibited. This bit has no effect on the ...
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Baseband Signal Processor MOD LEVELS Register (Hex address $12) The six least significant bits of the first byte in this register are used to set the attenuation of the Modulator 1 amplifier and the five least significant bits of the ...
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Baseband Signal Processor 8-bit Read Only Registers HEX ADDRESS/ REGISTER BIT 7 COMMAND NAME (D7) $41 STATUS 0 $42 RXDATA BIT 7 Read Only Register Description STATUS Register (Hex address $41) This register is used to indicate the status of ...
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Baseband Signal Processor SYNCF This bit is only defined when SYNC PRIME is enabled. (Bit 0) When the data sequence specified by SYNC has been successfully matched to the Rx incoming data, this bit will be set to "1". This ...
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Baseband Signal Processor Checking The checksum checker performs two tasks: It takes the first n-1 bits of a received ( bits) message, inverts bit n-1, and divides them modulo-2, by the generating polynomial: The 15 bits ...
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Baseband Signal Processor 1.6 Application Notes The following block diagrams show the possible arrangements for the pre- and de-emphasis required by PAA1382 and MPT1327 specifications. (showing both pre-emphasis positions, as required by the PAA1382 specification. Remove pre-emphasis 2 for the ...
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Baseband Signal Processor The FX829 should be programmed in the following manner: 1. Perform a General Reset when first applying power to the FX829. 2. Program the FX829 configuration whilst in powersave. e.g. UK/F, MIC, B/W, 1200/2400, DTMF0-3, DTMFHI, DTMFLO, ...
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Baseband Signal Processor (c) Subsequent bytes of Tx data should be written to the TXDATA register as soon as the TXDATAF bit has been set to”1”. After the last byte of Tx data has been loaded, the TXDATAF bit will ...
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Baseband Signal Processor 1997 Consumer Microcircuits Limited Figure 8 Reception of 2 Bytes of Data 23 FX829 D/829/4 ...
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Baseband Signal Processor 1997 Consumer Microcircuits Limited Figure 9 Transmission of 3 Bytes of Data 24 FX829 D/829/4 ...
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Baseband Signal Processor 1.7 Performance Specification 1.7.1 Electrical Performance Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the device. Supply ( Voltage on any pin Current into or ...
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Baseband Signal Processor Operating Characteristics For the following conditions unless otherwise specified: Xtal Frequency = 4.032MHz, Bit Rate = 1.2k bits/sec, Noise Bandwidth = Bit Rate, Audio Level 0dB ref = 308mVrms at 1kHz V = 3.3V to 5.0V, Tamb ...
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Baseband Signal Processor Amp 1 and Amp 2 Open Loop Gain (I/P = 1mV at 100Hz) Unity Gain Bandwidth Input Impedance (at 100Hz) Output Impedance (Open Loop) (Closed Loop) Distortion (DTMF) FFSK/DTMF TX OUT Tx O/P impedance (not powersaved) Tx ...
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Baseband Signal Processor FFSK Receiver Signal Input Dynamic Range Bit Error Rate (SNR = 12dB at 1200 Baud) (SNR = 12dB at 2400 Baud) (SNR = 20dB at 1200/2400 Baud) Receiver Synchronisation Probability of Bit 16 being correct Carrier Detect ...
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Baseband Signal Processor 10 0 -10 -20 -30 -40 -50 -60 10 Figure 10a Overall Audio Frequency Response for 12.5kHz Channel Separation 10 0 -10 -20 -30 -40 -50 -60 10 Figure 10b Overall Audio Frequency Response for 20kHz/25kHz Channel ...
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Baseband Signal Processor 1.7.1 Electrical Performance (continued) For the following conditions unless otherwise specified: Xtal Frequency = 4.032MHz, V Parameter t "CS-Enable to Clock-High" CSE t Last "Clock-High to CS-High" CSH t "CS-High to Reply Output 3-state" HIZ t "CS-High" ...
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Baseband Signal Processor Figure 13 Typical Variation of Bit Error Rate with Input Signal Level 1997 Consumer Microcircuits Limited Figure 12 Bit Error Rate Graph 31 FX829 D/829/4 ...
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... Baseband Signal Processor 1.7.2 Packaging Figure 14 D2 Mechanical Outline: Order as part no. FX829D2 Figure 15 D5 Mechanical Outline: Order as part no. FX829D5 1997 Consumer Microcircuits Limited 32 FX829 D/829/4 ...
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Baseband Signal Processor Figure 16 P4 Mechanical Outline: Order as part no. FX829P4 Handling precautions: This product includes input protection, however, precautions should be taken to prevent device damage from electro-static discharge. CML does not assume any responsibility for the ...
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CML Microcircuits COMMUNICATION SEMICONDUCTORS In the process of creating a more global image, the three standard product semiconductor companies of CML Microsystems Plc (Consumer Microcircuits Limited (UK), MX-COM, Inc (USA) and CML Microcircuits (Singapore) Pte Ltd) have undergone name changes ...