Datasheet
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28
27
26
25
24
23
22
21
20
19
18
17
16
15
D+
D-
V
BUS
DGNDU
HID0
HID1
HID2
SEL0
SEL1
V
CCCI
AGNDC
V L
IN
V R
IN
V
COM
SSPND
TEST0
V
CCXI
AGNDX
XTO
V
CCP2I
DGND
V
CCP1I
V L
OUT
XTI
TEST1
V
DDI
AGNDP
V R
OUT
PCM2900C
PCM2900C
PCM2902C
SBFS039 –SEPTEMBER 2011
www.ti.com
PCM2900C PIN ASSIGNMENTS
DB PACKAGE
SSOP-28
(TOP VIEW)
Table 1. PCM2900C TERMINAL FUNCTIONS
TERMINAL
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
(2)
HID1 6 I HID key state input (volume up), active-high
(2)
HID2 7 I HID key state input (volume down), active-high
(2)
SEL0 8 I Must be set to high
(3)
SEL1 9 I Must be set to high
(3)
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
V
BUS
3 – Connect to USB power (V
BUS
)
V
CCCI
10 – Internal analog power supply for codec
(4)
V
CCP1I
17 – Internal analog power supply for PLL
(4)
V
CCP2I
19 – Internal analog power supply for PLL
(4)
V
CCXI
23 – Internal analog power supply for oscillator
(4)
V
COM
14 – Common for ADC/DAC (V
CCCI
/2)
(4)
V
DDI
27 – Internal digital power supply
(4)
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
(5)
XTO 20 O Crystal oscillator output
(1) LV-TTL level.
(2) 3.3-V CMOS-level input with internal pull-down. This pin informs the PC of serviceable control signals such as mute, volume up, or
volume down, which have no connection with the internal DAC or ADC directly. See the Interface #3 and End-Points sections.
(3) TTL Schmitt trigger, 5-V tolerant.
(4) Connect a decoupling capacitor to GND.
(5) 3.3-V, CMOS-level input.
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Product Folder Link(s): PCM2900C PCM2902C