Datasheet

www.ti.com
PCM2901
PCM2903
SLES034C – MARCH 2002 – REVISED NOVEMBER 2007
PCM2903 TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
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
DIN 24 I S/PDIF input
(2)
DOUT 25 O S/PDIF output
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
(4)
SEL1 9 I Connected to the USB port of V
BUS
(4)
SSPND 28 O Suspend flag, active-low (Low: suspend, High: operational)
V
BUS
3 – Must be connected to V
DD
V
CCC
10 – Analog power supply for codec
(5)
V
CCP1
17 – Analog power supply for PLL
(5)
V
CCP2
19 – Analog power supply for PLL
(5)
V
CCX
23 – Analog power supply for oscillator
(5)
V
COM
14 – Common for ADC/DAC (V
CCC
/2)
(5)
V
DD
27 – Digital power supply
(5)
V
IN
L 12 I ADC analog input for L-channel
V
IN
R 13 I ADC analog input for R-channel
V
OUT
L 16 O DAC analog output for L-channel
V
OUT
R 15 O DAC analog output for R-channel
XTI 21 I Crystal oscillator input
(6)
XTO 20 O Crystal oscillator output
(1) LV-TTL level
(2) 3.3-V CMOS-level input with internal pulldown, 5-V tolerant
(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 have no direct connection with the internal DAC or ADC. See the Interface #3 and End-Points sections.
(4) TTL Schmitt trigger, 5-V tolerant
(5) Connect a decoupling capacitor to GND.
(6) 3.3-V CMOS-level input
8 Submit Documentation Feedback Copyright © 2002 – 2007, Texas Instruments Incorporated
Product Folder Link(s): PCM2901 PCM2903