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CMX608 Datasheet(PDF) 9 Page - CML Microcircuits |
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CMX608 Datasheet(HTML) 9 Page - CML Microcircuits |
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9 / 70 page  RALCWI Vocoder CMX608/CMX618/CMX638 2014 CML Microsystems Plc 9 D/608_18_38/11 4. External Components 1 2 3 4 5 6 7 8 9 10 11 12 NC Vss Vss 48 47 46 45 44 43 42 41 40 39 38 37 25 26 27 28 29 30 31 32 33 NC XTALSEL3 XTALSEL2 IOVDD IOVDD ENABXTAL XTALSEL1 R1 C3 Vss RESETN XTAL out XTAL in Vss XTAL C1 C2 Vss Vss Vss SYNC 13 14 15 16 17 18 19 20 21 22 24 23 VDD C5 VDD IOVDD C6 Vss Vss Vss Vss Vss IOVDD CBUS 34 35 36 IOVDD CMX608 IOVDD Vss C7 IOVDD C4 Vss Vss Vss D1 R2 IOVDD NC NC IOVDD Vss Vss NC NC IOVDD IOVDD CODEC PORT Vss C8 Vss C9 Vss C10 Vss C11 Vss C12 Vss IOVDD IOVDD C1 22pF C9 100nF C2 22pF C10 100nF C3 1.0µF C11 1.0µF C4 100nF C12 100nF C5 1.0µF C6 100nF R1 470k C7 100nF R2 100k C8 100nF D1 small signal diode Notes: 1. On CMX608/CMX618/CMX638 devices, the crystal selection pins (XTALSEL1, XTALSEL2 and XTALSEL3) must be permanently tied to either IOVDD or VSS and not driven from a logic level output of the host µController (see Table 1 for a list of crystal frequencies). For 9.6MHz and 12.0MHz operation, either a crystal or a clock can be used. For all other frequencies, a clock must be injected into the XTALIN pin and the XTALOUT pin must be left unconnected. 2. To use the CMX608/CMX618/CMX638, tie the ENABXTAL pin to IOVDD. If the ENABXTAL pin is connected to VSS it will force the device into a deep powersave mode, where the C-BUS interface and clock input (XTALIN) are disabled and the crystal oscillator is powered down. 3. A single 10µF electrolytic capacitor may be fitted in place of C5 and C11, providing the two VDD pins are connected together on the pcb with an adequate width power supply trace. Figure 2 CMX608 Recommended External Components |
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