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CRD4412 Datasheet(PDF) 7 Page - Cirrus Logic |
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CRD4412 Datasheet(HTML) 7 Page - Cirrus Logic |
7 / 15 page DS749RD1 7 CRD4412 switching outputs in the 30-50 MHz range. The snubbing components should be as close as practical to the output pins to maximize their effectiveness. • A separate ground plane with a solid electrical connection to the chassis and which surrounds the speaker output connector should be implemented. This allows the speaker outputs to be RF decoupled to the chassis just before they exit the chassis from the speaker connector. • Make use of source termination resistors on all digital signals whose traces are longer than about 25 mm. It is extremely critical that the layout of the power amplifier section of the CRD4412 be copied as exactly as possible to assure best RF/EMI performance. 4. SYSTEM CONNECTIONS AND JUMPERS Connector Name Reference Designator Signal Direction Connector Function Speaker Connector J5 Output Analog output from CS4525. Table 1. System Connections Connector Name Reference Designator Header Function CRD4412 I/F J2 Connection to CRD4525 controller card. - J1 Selects between mono and stereo PWM input mode. -J4 Connects CS4412 thermal warning output to CRD4412 interface header. Allows direct access to CS4412 TWR and CS4525 DLY_SDIN signals when CRD4525 is connected. -J6 Allows direct access to CS4412 ERROC12/34 and CS4525 DLY_SDOUT signals when CRD4525 is connected. Table 2. System Headers Pin Signal Name Signal Function 1 SDA I²C serial data. 2 +3.3 V Positive VD power. 3 SCL I²C serial clock. 4 DLY_SDIN/TWR CS4525 delay port serial audio data input/CS4412 thermal warning output. 5 ERROC1234 CS4412 over-current error outputs. 6 DLY_SDOUT CS4525 delay port serial audio data output. 7, 9, 11, 13, 15, 16 GND Ground reference. 8 PWM_SIG1 Left channel logic level PWM input. 10 PWM_SIG2 Right channel/mono logic level PWM input. 12 ERRUVTE CS4412 under-voltage/temperature error output. 14 RST CS4412 reset input. 17, 18, 19, 20 +9 V to +18 V High voltage VP power. Table 3. CRD4412 Interface Header Signal Assignments |
Similar Part No. - CRD4412 |
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Similar Description - CRD4412 |
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