MX803AJ データシートの表示（PDF） - MX-COM Inc

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MX803AJ

Audio Signaling Processor

MX-COM Inc  

Audio Signaling Processor

5

MX803A PRELIMINARY INFORMATION

Pin No.

18

19

20

21

23

24

8, 9, 22

Name

CAL/CUES Out

Sum in

Sum Out

Switched Sum

Out

Serial Clock

VDD

N/C

Type Description

Output

An auxiliary, selectable tone frequency output, providing a square wave

CALibration signal from the Tone 2 Generator or a sine wave CUES (beep)

signal from the Summing Amplifier. The output mode (CAL or CUES) is

selected by Bit 14 in the TX Tone Generator 2 Register (Table 5). When Tone

Generator 2 is set to Notone, the CAL input is pulled to VBIAS; during a

powersave of Tone Generator 2 it is held at VSS.

Input

Input to the on-chip Summing Amplifier. This amplifier is available for

combining Tone 1 and Tone 2 outputs (DTMF). Gain and coupling components

should be used at this input to provide the required system gains. See Figure 2

and Figure 3

Output Output of the on-chip summing amplifier. Combined tones (1 and 2) are

available at this output. See Figure 2 and Figure 3.

Output This is the combined tone output available for transmitter modulation. The

switch allows control of the MX803A output. Control of this switch is by Bit 4 of

the Control Register. See Figure 2 and Figure 3.

Input C-BUS serial clock input. This clock, produced by the µC, is used for transfer

timing of commands and data to and from the MX803A. See Figure 8 and

Figure 9.

Power Positive supply. A single +5 volt power supply is required. Levels and voltages

within this Audio Signaling Processor are dependent upon this supply..

No Internal Connection. These pins may be connected to VSS to improve

screening and reduce noise levels around the MX803A.

© 1996 MX•COM, INC.

Tele: 800 638 5577 910 744 5050 Fax: 910 744 5054

Doc. # 20480122.003

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