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PCM2903 Datasheet(PDF) 7 Page - Texas Instruments |
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PCM2903 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 33 page PCM2901 PCM2903 SLES034B − MARCH 2002 − REVISED JUNE 2004 www.ti.com 7 PCM2901 Terminal Functions TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION AGNDC 11 − Analog ground for codec AGNDP 18 − Analog ground for PLL AGNDX 22 − Analog ground for oscillator D– 2 I/O USB differential input/output minus(1) D+ 1 I/O USB differential input/output plus(1) DGND 26 − Digital ground DGNDU 4 − Digital ground for USB transceiver HID0 5 I HID key state input (mute), active high(3) HID1 6 I HID key state input (volume up), active high(3) HID2 7 I HID key state input (volume down), active high(3) SEL0 8 I Must be set to high(5) SEL1 9 I Connected to the USB port of VBUS(5) SSPND 28 O Suspend flag, active low (Low: suspend, High: operational) TEST0 24 I Test pin, must be connected to GND TEST1 25 O Test pin, must be left open VBUS 3 − Must be connected to VDD VCCC 10 − Analog power supply for codec(4) VCCP1 17 − Analog power supply for PLL(4) VCCP2 19 − Analog power supply for PLL(4) VCCX 23 − Analog power supply for oscillator(4) VCOM 14 − Common for ADC/DAC (VCCC/2) (4) VDD 27 − Digital power supply(4) VINL 12 I ADC analog input for L-channel VINR 13 I ADC analog input for R-channel VOUTL 16 O DAC analog output for L-channel VOUTR 15 O DAC analog output for R-channel XTI 21 I Crystal oscillator input(2) XTO 20 O Crystal oscillator output (1) LV-TTL level (2) 3.3-V CMOS level input (3) 3.3-V CMOS level input with internal pulldown. This pin informs the PC of serviceable control signals such as mute, volume up, or volume down, which has no connection with the internal DAC or ADC directly. See the Interface #3 and End-Points sections. (4) Connect a decouple capacitor to GND (5) TTL Schmitt trigger, 5 V tolerant |
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