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0W344-004-XTP 数据表(PDF) 6 Page - ON Semiconductor |
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0W344-004-XTP 数据表(HTML) 6 Page - ON Semiconductor |
6 / 43 page BelaSigna 200 Table 2: Non-Critical Signal Pin Name Description Routing Guideline CAP0, CAP1 Internal charge pump - capacitor connection Place 100nF capacitor close to pins DEBUG_TX, DEBUG_RX Debug port Not critical Connect to test points TWSS_SDA, TWSS_CLK TWSS port Not critical GPIO[14..0] General-purpose I/O Not critical GPIO[15] General-purpose I/O Determines voltage mode during boot. For 1.8V operation, should be connected to DGND Not critical UART_RX, UART_TX General-purpose UART Not critical PCM_FRAME, PCM_CLK, PCM_OUT, PCM_IN Pulse code modulation port Not critical I2S_INA, I2S_IND, I2S_FA, I2S_FD, I2S_OUTA, I2S_OUTD Philips I²S compatible port Not critical DCLK Programmable clock output Not critical If used, keep away from analog inputs/outputs LSAD[5..0] Low-speed A/D converters Not critical SPI_CLK, SPI_CS, SPI_SERI, SPI_SERO Serial peripheral interface port Connect to EEPROM Not critical 3.3 Audio Inputs The audio input traces should be as short as possible. The input impedance of each audio input pad (e.g., AI0, AI1, etc.,) is high (approximately 500kΩ); therefore a 10nF capacitor is sufficient to decouple the DC bias1. Keep audio input traces strictly away from output traces. Microphone ground terminals should be connected to the AGND plane (if present) or share a trace with the input ground reference voltage pin (AIR) to the star point. Analog and digital outputs MUST be kept away from microphone inputs. 3.4 Audio Outputs The audio output traces should be as short as possible. If the direct digital output is used, the trace length of RCVRx+ and RCVRx- should be approximately the same to provide matched impedances. If the analog audio output is used, the ground return for the external power amplifier should share a trace with the output ground reference voltage pin (AOR) to the star point. 1 The capacitor and the internal resistance form a first-order analog high pass filter whose cutoff frequency can be calculated by f3dB (Hz) = 1/(R C 2π), which results with ~30Hz for 10nF capacitor. Rev. 16 | Page 6 of 43 | www.onsemi.com |
类似零件编号 - 0W344-004-XTP |
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类似说明 - 0W344-004-XTP |
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