CMX969D5 MX-COM, Inc., CMX969D5 Datasheet
CMX969D5
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CMX969D5 Summary of contents
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... The CMX969 uses signal filtering, data block formats and FEC/CRC algorithms compatible with the MDC and RD-LAP over-air standards. The device is programmable to operate from a wide choice of Xtal frequencies and is available in 24-pin PDIP (CMX969P4), 24-pin SSOP (CMX969D5), and 24-pin TSSOP (CMX969E2) packages. ...
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... Lowpass Filter Delay ............................................................................................................ 24 4.6.5 Status Register ..................................................................................................................... 24 4.6.6 Data Quality Register............................................................................................................ 26 ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 2 CONTENTS All trademarks and service marks are held by their respective companies. ...
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... Operating Characteristics ..................................................................................................... 30 6.2 Packaging........................................................................................................................ 34 MX-COM, Inc. reserves the right to change specifications at any time and without notice. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA ...
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... XTAL XTAL RXFB Rx Input Amp From FM V Demod BIAS RXIN ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 4 STATUS QUALITY REGISTER REGISTER 8 COMMAND ...
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... DD Note: Internal protection diodes are connected from each signal pin to V ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 5 A 'wire-ORable' output for connection to the host µ C's Interrupt Request input ...
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... Tuning fork crystals generally cannot meet this requirement. To obtain DD crystal oscillator design assistance, please consult your crystal manufacturer. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA ...
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... In receive mode, this block translates received symbols to binary data, using the FEC information to correct a large proportion of transmission errors. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... If an external clock source used, then it should be connected to the XTAL input pin, the XTAL pin should be left unconnected, and X1, C3, C4 and R3 not fitted. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Forward Error Correcting coding scheme for the block oriented tasks THB, TIB, TLB, TSID, RHB, RILB and RSID described in Section 4.5.4. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... SYNC SYNC BLOCK (bits 112 ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 10 Intermediate Blocks Address & ...
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... Symbol Sync: +3 sent first Figure 6: RD-LAP Over Air Signal Format ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 11 Header Block ...
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... Control register bits 7-6 set to ‘1 0’ or ‘1 1’ 4.5.2.2 Control Register B5: Reserved for future use. This bit should always be set to ‘0’. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 12 ...
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... Setting this bit to '1' puts the modem into Transmit mode, clearing it to '0' puts the modem into Receive mode. Note that changing between receive and transmit modes will cancel any current task. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Data Buffer when the BFREE (Buffer Free) bit of the Status Register is '0'. Different tasks apply in RD-LAP and MDC receive and transmit modes. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... BFREE bit of Status Register IRQ bit of Status Register IRQ output ( IRQ EN = '1') TXOUT signal ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 16 RD-LAP NULL ...
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... Once the modem has read the data bytes from the Data Block Buffer, the BFREE and IRQ bits of the Status Register will be set to '1'. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Note that due to delays in the transmit low pass filter, it will take several symbol times for any change to appear at the TXOUT pin. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 18 is applied or the ZP bit of the Mode Register changed from ‘ ...
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... NULL: This ‘task’ allows the AFSD or RXEYE bits to be changed without any other effect. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA ...
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... Register IRQ bit will also be set to '1'.) Note that when the third 'S' symbol is received in RD-LAP mode the SRDY bit will be set to '1' coincidentally with the BFREE bit also being set to '1'. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Register will be updated and the BFREE, SRDY and IRQ bits set to '1' to indicate that the µC may read the 3 received bytes from the Data Block Buffer and write the next task to the modem's Command Register. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Max time allowed from BFREE going logic '1' (high) for next task (and data written to modem ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 22 ...
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... Maximum time from the last bit of the task 7 entering the de-interleave circuit to BFREE going to a logic '1' (high) ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 23 ...
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... Mode Register is '1', then the chip IRQ output will be pulled low (to V IRQ bit is set to '1', and will go high impedance when the Status Register is read. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... The bit is cleared to '0' immediately after a read of the Status Register RESET task or by changing the TX PSAVE bits of the Mode Register. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 25 ...
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... A low reading will be obtained if the received signal waveform is distorted in any significant way. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA ...
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... AFSD should be left running so that it can detect the new transmitter and automatically abort any current task and adjust the timing and level settings to suit the new signal. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Frame Sync detection. Not that the SFS task signals that it has found a Frame Sync pattern by setting the Status Register BFREE bit to 1, whereas AFSD sets the AFSDET bit. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 ...
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... Correct operation for supply voltages less than 3.0V are subject to a restricted temperature range. Supply ( Operating Temperature Symbol Rate Xtal Frequency ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 29 Min. -0.3 -0 ...
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... Output Logic "1" Level (l = 120µA) OH Output Logic "0" Level (l = 360µA) OL 'Off' State Leakage Current (V ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 30 Notes 1 1 ...
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... Timing for an external input to the XTAL pin and A1 pins pins. 9. IRQ pin. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 31 = 5.0V and T = 25°C. ...
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... Note: BER vs. S/N measured under nominal working conditions, after a Frame Sync has been detected using AFSD, with pseudo-random data. ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA ...
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... DATA logical 'or and RD signals Figure 17: µ µ µ µ C Parallel Interface Timings ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 33 Notes Min. 0 ...
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... A PIN 1 PIN Figure 19: 24-pin SSOP (D5) Mechanical Outline: Order as part no. CMX969D5 ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA ...
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... RD-LAP MDC4800 Modem Figure 20: 24-pin PDIP (P4) Mechanical Outline: Order as part no. CMX969P4 ¤ ¤ ¤ ¤ 2001 MX-COM, Inc. www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054 4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA 35 CMX969 Advance Information All trademarks and service marks are held by their respective companies ...