CS9236-CQ データシートの表示（PDF） - Cirrus Logic

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CS9236-CQ

Single-Chip Wavetable Music Synthesizer

Cirrus Logic 

CS9236

CS9236/CS4333 Typical Connections

In applications which require analog audio output from the

CS9236 synthesizer, the CS4333 Stereo DAC is utilized.

Figure 2 shows typical connections for a stand-alone music

synthesizer application (e.g. low-cost musical keyboards,

MIDI modules, game boxes). In this application the CS9236

digital audio output, SOUT, and the associated clocks, LR-

CLK and XTALO, are input to the CS4333. The CS4333

converts the stereo digital audio data stream into left and right

analog audio outputs, LOUT and ROUT.

Note that the example shown in Figure 2 employs an R-C fil-

ter circuit to generate a reset signal which is applied to both

the CS9236 RST and PDN inputs. In some applications it

may be desirable to control one or both of these control sig-

nals dynamically.

The CS4333 clock input is driven by the CS9236 crystal os-

cillator output pin. The CS9236 must be placed as close as

possible to the CS4333 in order to minimize the length of the

XTALO/MCLK trace. The XTALO capacitor must be 10 pF,

while the XTAL3I capacitor remains the typical 22 pF. If the

CS9236 cannot be placed close to the CS4333, the buffered

crystal circuit shown in Figure 3 or a MicroClock MK1444-

02 clock generator may be used. Do not use separate 16.9344

MHz crystals/clock sources for the synthesizer and DAC.

Figure 2. CS9236/CS4333 Typical Connections.

Figure 3. Buffered Crystal Oscillator Circuit.

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DS214PP11

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