Texas Instruments PCM2704, Manual

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PCM2704
,,
PCM2705
PCM2706, PCM2707
www.ti.com ....................................................................................................................................................... SLES081F – JUNE 2003 – REVISED JANUARY 2009
Terminal Functions (PCM2706PJT/PCM2707PJT)
TERMINAL
I/O DESCRIPTION
NAME NO.
AGNDL 26 — Analog ground for headphone amplifier of L-channel
AGNDR 31 — Analog ground for headphone amplifier of R-channel
CK 14 O Clock output for external ROM (PCM2706). Must be left open (PCM2707).
D+ 23 I/O USB differential input/output plus
(1)
D– 22 I/O USB differential input/output minus
(1)
DGND 20 — Digital ground
DOUT 17 O S/PDIF output/I
2
S™ data output
DT 15 I/O Data input/output for external ROM (PCM2706). Must be left open with pullup resistor (PCM2707).
(1)
FSEL 9 I Function select (LOW: I
2
S DATA output, HIGH: S/PDIF output)
(1)
FUNC0 5 I/O HID key state input (next track), active HIGH (FSEL = 1). I
2
S LR clock output (FSEL = 0).
(2)
FUNC1 19 I/O HID key state input (previous track), active HIGH (FSEL = 1). I
2
S bit clock output (FSEL = 0).
(2)
FUNC2 18 I/O HID key state input (stop), active HIGH (FSEL = 1). I
2
S system clock output (FSEL = 0).
(2)
FUNC3 4 I HID key state input (play/pause), active HIGH (FSEL = 1). I
2
S data input (FSEL = 0).
(2)
HID0/MS 6 I HID key state input (mute), active HIGH (PCM2706). MS input (PCM2707)
(2)
HID1/MC 7 I HID key state input (volume up), active HIGH (PCM2706). MC input (PCM2707)
(2)
HID2/MD 8 I HID key state input (volume down), active HIGH (PCM2706). MD input (PCM2707)
(2)
HOST 3 I Host detection during self-powered operation (connect to V
BUS
). Max power select during bus-powered
operation. (LOW: 100 mA, HIGH: 500 mA).
(3)
PGND 1 — Analog ground for DAC, OSC, and PLL
PSEL 16 I Power source select (LOW: self-power, HIGH: bus-power)
(1)
SSPND 11 O Suspend flag, active LOW (LOW: suspend, HIGH: operational)
TEST 10 I Test pin. Must be set HIGH
(1)
V
BUS
24 — Connect to USB power (V
BUS
) for bus-powered operation. Connect to V
DD
for self-powered operation.
V
CCL
27 — Analog power supply for headphone amplifier of L-channel
(4)
V
CCP
2 — Analog power supply for DAC, OSC, and PLL
(4)
V
CCR
30 — Analog power supply for headphone amplifier of R-channel
(4)
V
COM
32 — Common voltage for DAC (V
CCP
/2). Connect decoupling capacitor to PGND.
V
DD
21 — Digital power supply
(4)
V
OUT
L 28 O DAC analog output for L-channel
V
OUT
R 29 O DAC analog output for R-channel
XTI 12 I Crystal oscillator input
(1)
XTO 13 O Crystal oscillator output
ZGND 25 — Ground for internal regulator
(1) LV-TTL level
(2) LV-TTL level with internal pulldown
(3) LV-TTL level, 5-V tolerant
(4) Connect decoupling capacitor to GND. Supply 3.3 V for self-powered applications.
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Product Folder Link(s): PCM2704 PCM2705 PCM2706 PCM2707