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CM108AH Datasheet(PDF) 6 Page - C-Media Electronics |
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CM108AH Datasheet(HTML) 6 Page - C-Media Electronics |
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6 / 27 page  CM108AH Highly Integrated USB Audio I/O Controller www.cmedia.com.tw Copyright© C-Media Electronics Inc. Rev. 2.1︱ Page 6/27 3.3 Pin Signal Descriptions Pin # Symbol Type Description 1 SPDIFO DO, 8mA, SR SPDIF output 2 DI DIO, 8mA, PD, 5VT EEPROM interface data read from EEPROM 3 DO DO, 4mA, SR EEPROM interface data write to EEPROM 4 SK DO, 4mA, SR EEPROM interface clock 5 CS DO, 4mA, SR EEPROM interface chip select 6 MUTER DI, ST, PU Mute recording (edge trigger with de-bouncing) 7 PWRSEL DI, ST Chip power select pin, worked by MODE Pin Speaker mode – H: 100mA self-powered L: 500mA Bus-powered Headset mode – H: 100mA Bus-powered, L: 500mA Bus-powered (H: push up to 3.3V, L: push down to ground) 8 XI DI Input pin for 12MHz oscillator 9 XO DO Output pin for 12MHz oscillator 10 MODE DI, ST Operating mode selection H: speaker mode - playback only L: headset mode - playback & recording (H: push up to 3.3V, L: pull down to ground) 11 N.C. 12 LEDO DO, SR, 8mA LED operation light: output H for power on, toggling for data transmit 13 GPIO3 DIO, 8mA, PD, 5VT GPIO pin 14 DVSS1 P Digital ground 15 GPIO4 DIO, 8mA, PD, 5VT GPIO pin 16 SDIN DIO, 8mA, PD, 5VT ADC I2S data input 17 ADSCLK DIO, 4mA, SR ADC I2S serial clock 18 MUTEP DI, ST, PU Mute playback (edge trigger with de-bouncing) 19 ADLRCK DO, 4mA, SR ADC I2S left/right clock 20 ADMCLK DIO, 4mA, SR 11.2896MHz output for 44.1KHz sampled data and 12.288MHz output for 48KHz sampled data 21 LEDR DO, SR, 8mA LED for mute recording indicator, output H when recording is muted 22 ADSEL DI, ST, PD ADC input source select pin H: use external (via I2S) ADC L: use internal ADC (H: push up to 3.3V, L: push down to ground) 23 TEST DI, ST, PD Test mode select pin, H: test mode L: normal operation (H: push up to 3.3V, L: push down to ground) 24 AVSS1 P Analog ground 25 VBIAS AO Microphone bias voltage supply (4.5V), with small driving capability 26 VREF AO Connecting to external decoupling capacitor for embedded bandgap circuit, 2.25V output 27 MICIN AI Microphone input 28 N.C. 29 AVDD1 P 5V analog power for analog circuit 30 LOL AO Line out: left channel 31 LOBS AO DC 2.25V output for line out bias 32 LOR AO Line out: right channel 33 AVSS2 P Analog ground |
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