CMX7262 Datasheet, PDF (4/52 Pages) CML Microcircuits – Half-duplex operation

TWELP Vocoder
CMX7262
6.14 C-BUS Register Summary.......................................................................................... 43
7 Performance Specification ................................................................................................... 44
7.1 Electrical Performance ............................................................................................... 44
7.1.1 Absolute Maximum Ratings ................................................................................. 44
7.1.2 Operating Limits ................................................................................................... 44
7.1.3 Operating Characteristics..................................................................................... 45
7.1.4 Parametric Performance ...................................................................................... 48
7.2 C-BUS Timing............................................................................................................. 49
7.3 Packaging ................................................................................................................... 50
Table
Page
Table 1 Definition of Power Supply and Reference Voltages........................................................ 10
Table 2 BOOTEN Pin States......................................................................................................... 25
Table 3 Packet Sizes..................................................................................................................... 29
Table 4 C-BUS Registers .............................................................................................................. 43
Figure
Page
Figure 1 Block Diagram................................................................................................................... 6
Figure 2 CMX7262 Power Supply and De-coupling ...................................................................... 11
Figure 3 Recommended External Components – Xtal Interface................................................... 12
Figure 4 Recommended External Components – C-BUS Interface.............................................. 12
Figure 5 Interfacing the CMX7262 to Serial Memory .................................................................... 13
Figure 6 Analogue Audio Output Routing...................................................................................... 14
Figure 7 Recommended External Components – ANAOUT1/ANAOUT2 Reconstruction Filter... 15
Figure 8 Recommended External Components – SPKR2 Output ................................................ 15
Figure 9 Recommended External Components – SPKR1 Output ................................................ 15
Figure 10 Analogue Audio Input Routing ...................................................................................... 16
Figure 11 Recommended External Components – Single-Ended Audio Input Interface .............. 17
Figure 12 CMX7262 Inputs and Outputs....................................................................................... 19
Figure 13 CMX7262 Using Internal Audio Codec Interfaced With CMX7141............................... 20
Figure 14 CMX7262 Interfaced With CMX7141 Using CMX7141’s Audio Codec ........................ 21
Figure 15 Basic C-BUS Transactions ........................................................................................... 23
Figure 16 C-BUS Data-Streaming Operation................................................................................ 24
Figure 17 FI Loading from Host .................................................................................................... 26
Figure 18 FI Loading from Serial Memory..................................................................................... 27
Figure 19 Input Data Transfer into the CMX7262 ......................................................................... 36
Figure 20 Output Data Transfer from the CMX7262 ..................................................................... 36
Figure 21 TWELP Encoder Operation Flowchart.......................................................................... 40
Figure 22 C-BUS Timings ............................................................................................................. 49
Figure 23 Mechanical Outline of 64-pin VQFN (Q1) ..................................................................... 50
Figure 24 Mechanical Outline of 64-pin LQFP (L9)....................................................................... 51
Information in this data sheet should not be relied upon for final product design. It is always recommended
that you check for the latest product datasheet version from the CML website: [www.cmlmicro.com].
 2013 CML Microsystems Plc
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