CMX605 Consumer Microcircuits Limited, CMX605 Datasheet
CMX605
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CMX605 Summary of contents
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... Digital Ringing Voltage Generator 1.1 Brief Description The CMX605 is an integrated telecom tone generator and DTMF encoder/decoder designed for ISDN interfaces, Wireless Local Loop and Analogue to Digital Phone Conversion systems. The tone generator covers an extensive range of pre-programmed tones used in analogue phone systems (POTS). Three outputs are provided: ‘ ...
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... Tone/FSK Encoder and Tone Encoder .................................. 7 1.5.4 SPM Generator ...................................................................... 10 1.5.5 Transmit Operator................................................................. 10 1.5.6 Tx UART ................................................................................ 10 1.5.7 DTMF Tone Decoder ............................................................. 12 1.5.8 ‘C-BUS’ Interface................................................................... 13 1.5.9 ‘C-BUS’ Registers ................................................................. 14 1.6 Application Notes 1.6.1 Telecom Tones ....................................................................... 15 1.6.2 C-BUS Timing......................................................................... 19 1.7 Performance Specification 1.7.1 Electrical Performance.......................................................... 22 1.7.2 Packaging.............................................................................. 26 2001 Consumer Microcircuits Limited CONTENTS ............................................................................ 1 ................................................................................. 3 ......................................................................................... 4 ................................................................... 6 ...................................................................... 7 ........................................................................ 15 ....................................................... 22 2 CMX605 Page D/605/6 ...
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... Digital Line to POTS Interface 1.2 Block Diagram 2001 Consumer Microcircuits Limited Figure 1 Block Diagram 3 CMX605 D/605/6 ...
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... C Interrupt Request input. This output is pulled down when active and is high impedance when inactive. An external pullup resistor is required. Power The negative supply rail (ground). SS O/P The sinewave output of the Tones and FSK signal generators. O/P The sinewave output of the SPM signal generator. 4 Description CMX605 D/605/6 ...
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... V decoupling and protecting the receive path from extraneous in-band signals are very BIAS important recommended that the printed circuit board is laid out with a ground plane in the CMX605 area to provide a low impedance connection between the V V decoupling capacitors. BIAS 2001 Consumer Microcircuits Limited ...
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... Digital Line to POTS Interface 1.4 External Components Figure 2 Recommended External Components R1 X1 Resistors ±5%, capacitors ±10% unless otherwise stated. 2001 Consumer Microcircuits Limited C1, C2 100k 3.579545 MHz C3 C4 CMX605 18pF 0.1µF 1.0µF D/605/6 ...
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... If the clock is supplied from an external source, C1, C2 and X1 should not be fitted. If the clock is provided by an external source which is not always running, then the CMX605 should be reset when the clock is not available. Resetting the CMX605 will also turn off the on-chip oscillator. ...
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... CMX605 (Hz) * 17.1 * 20.5 * 24.9 * 34.1 * 41.0 * 51.2 - 262.9 293.6 348.2 392.6 1600 1633 1827 587.2 (Hz) 330 416 420 425 433 440 450 460 480 500 600 620 720 930 - D/605/6 ...
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... CMX605 (Hz) 700 900 1100 1300 1500 1700 - 2100 2225 - 2750 1209 1336 1477 1633 (Hz) 540 660 780 900 1020 1140 - 1380 1500 1620 1740 1860 1980 ...
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... DTMF High Frequency Tone DTMF Low Frequency Tone FSK Signal . SS Signal Level Adjustment Bit 3 Bit 0dBm -3dBm -3dBm -5dBm 0dBm V peak to peak. When the RING signal DD (dB -10 -12 -14 CMX605 » 2dB D/605/6 ...
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... Mark (‘1’) signal will be transmitted until a new value is loaded into TX DATA. If the ‘Tx Sync’ mode is selected then the byte already in the TX DATA Register will be re-transmitted. 2001 Consumer Microcircuits Limited Figure 3a Transmit UART Function (Async) Figure 3b Transmit UART Function (Sync) 11 CMX605 D/605/6 ...
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... Pairs Upper Frequency Keypad (Hz) Legend 1633 D 1209 1 1336 2 1477 3 1209 4 1336 5 1477 6 1209 7 1336 8 1477 9 1336 0 1209 * 1477 # 1633 A 1633 B 1633 C CMX605 D/605/6 ...
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... Address byte sent from the µC which may be followed by a single data byte sent from the µ written into one of the CMX605’s Write Only Registers single byte of data read out from one of the CMX605’s Read Only Registers, as illustrated in Figure 4. ...
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... Sync 1 = Async Tx Level: Tx Level: Tone Fields: (lsb) (msb DTMF: DTMF: DTMF: Rx Data Rx Data Rx Data (D3) (msb) (D2) (D1) and internal circuits to stabilize when CMX605 0 N/A FSK mode V23 1 = Bell 202 Tone Fields: (lsb DTMF: Rx Data (D0) (lsb) D/605/6 ...
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... The tables are not exhaustive, but list the more commonly used tones. Ringing Signals (f 2.5%) (Hz) Off 16 2001 Consumer Microcircuits Limited Figure 5 Tone Starting and Stopping Figure 6 Tone Changing Field 0 (Hex) $00 $01 $02 $03 $04 $05 $06 15 BIAS, . BIAS CMX605 and D/605/6 ...
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... Group B Field 0 (Hex) $10 $20 $30 $40 $50 $60 Field 1 (Hex) $00 $10 $20 $30 $40 $50 $60 $C0 $04 $06 $07 $09 $0A $0B $0C 16 Field 0 (Hz) (Hex) $6E $7E $8E $9E $AE $BE $CE $DE Field 0 (Hz) (Hex) 468 $80 495.8 $90 520.6 $A0 562.8 $C0 595 $E0 612.5 $F0 CMX605 D/605/6 ...
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... Consumer Microcircuits Limited M Field 1 (Hex) $00 $66 $F6 $FC $C4 $C7 $D4 $F4 $1C $27 Field 2 (Hex) $00 $FF $CC $CD $CE $DC $DD $DE $EC $ED $EE $FD $FC $FE $CF $DF $EF Field 2 (Hex) $00 $80 $30 $40 $90 $A0 $08 $09 $BB 17 ultiplicative ixing M Field 1 (Hz) (Hex) 400*16.2 $B2 400*20 $A3 400*25 $94 400*33 $85 400*40 $76 400*50 $67 450*25 $E4 600*120 $FD CMX605 D/605/6 ...
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... Backward mode Field 3 (Hex) (Hz) $00 Off $89 1140+1020 $8A 1140+900 $9A 1020+900 $8B 1140+780 $9B 1020+780 $AB 900+780 $8C 1140+660 $9C 1020+660 $AC 900+660 $BC 780+660 $8D 1140+540 $9D 1020+540 $AD 900+540 $BD 780+540 $CD 660+540 18 CMX605 Field 3 (Hex) $00 $65 $64 $54 $63 $53 $43 $62 $52 $42 $32 $61 $51 $41 $31 $21 D/605/6 ...
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... Please note that the C-BUS timing is not shown to the same scale as the FSK output (it has been magnified by at least 20 times to make it visible on the same scale). Figure 7a ASYNC mode after GENERAL RESET 2001 Consumer Microcircuits Limited 19 CMX605 D/605/6 ...
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... Digital Line to POTS Interface Figure 7b SYNC mode after GENERAL RESET 2001 Consumer Microcircuits Limited 20 CMX605 D/605/6 ...
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... Digital Line to POTS Interface Figure 7c SYNC mode after GENERAL RESET 2001 Consumer Microcircuits Limited (using alternative order of commands) 21 CMX605 D/605/6 ...
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... A Xtal frequency of 3.579545MHz ±0.1% is required for correct operation. 2001 Consumer Microcircuits Limited pins SS Notes 1 22 Min. Max. Unit -0.3 7 -50 +50 mA -20 +20 mA Min. Max. Unit 800 mW 13 mW/°C -55 +125 °C -40 +85 °C Min. Max. Unit 2.7 5.5 V -40 +85 °C 3.575965 3.583125 MHz CMX605 D/605/6 ...
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... DTMF Low Frequency Group Output Impedance Tone frequency resolution Tone output distortion Notes not including any current drawn from the CMX605 pins by external circuitry other than X1, C1 and C2 nominal signal frequencies and without skew. 3. Excluding XTAL/CLOCK pin ...
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... Min. Typ. Max. -29 -40.0 -9.0 - 10.0 ±1.8 - ±4 45.0 40 20 20.0 Min. Typ. Max. -1.5 0 1.0 -1.0 0 0.5 -14.0 - 14 10.0 - Min. Typ. Max 5 10.0 - Min. Typ. Max Min. Typ. Max. 100 - - 100 - - - 1 CMX605 Unit dBm dBm Unit dBm Unit dB MHz M k Unit ms Unit D/605/6 ...
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... Reply Data Hold time RDH Note: These timings are for the latest version of the ‘C-BUS’ as embodied in the CMX605, and allow faster transfers than the original ‘C-BUS’ timings given in CML Publication D/800/Sys/3 July 1994. Typical UART Timings (See Figures 3a and 3b) ...
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... Digital Line to POTS Interface 1.7.2 Packaging Figure 9 16-pin SOIC (D4) Mechanical Outline: Order as part no. CMX605D4 Figure 10 16-pin DIL (P3) Mechanical Outline: Order as part no. CMX605P3 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 use of any circuitry described. No IPR or circuit patent licences are implied ...
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... CML Microcircuits Product Prefix Codes Until the latter part of 1996, the differentiator between products manufactured and sold from MXCOM, Inc. and Consumer Microcircuits Limited were denoted by the prefixes MX and FX respectively. These products use the same silicon etc. and today still carry the same prefixes. ...