ꢀ ꢁꢂ ꢃ ꢄ ꢅ ꢆꢇ ꢀꢁ ꢂ ꢃ ꢄ ꢅ ꢈ
ꢂ
ꢀ
ꢁ
ꢂ
ꢃ
ꢄ
ꢅ
ꢉꢇ
ꢀ
ꢁ
ꢃ
ꢄ
ꢅ
ꢄ
www.ti.com
SLES081A − JUNE 2003 – REVISED MAY 2004
Terminal Functions (PCM2704DB/PCM2705DB)
TERMINAL
NAME
I/O
DESCRIPTION
Analog ground for headphone amplifier of L-channel
NO.
12
17
2
AGNDL
—
AGNDR
CK
—
Analog ground for headphone amplifier of R-channel
O
Clock output for external ROM (PCM2704). Must be left open (PCM2705).
(1)
D+
9
I/O USB differential input/output plus
(1)
I/O USB differential input/output minus
D–
8
DGND
DOUT
DT
6
—
O
Digital ground
S/PDIF output
5
(1)
I/O Data input/output for external ROM(PCM 2704). Must be left open with pullup resistor (PCM2705).
3
(3)
HID0/MS
HID1/MC
HID2/MD
HOST
22
23
24
21
I
I
I
I
HID key state input (mute), active HIGH (PCM2704). MS input (PCM2705).
HID key state input (volume up), active HIGH (PCM2704). MC input (PCM2705).
HID key state input (volume down), active HIGH (PCM2704). MD input (PCM2705).
(3)
(3)
). Max power select during bus-powered
Host detection during self-powered operation (connect to V
BUS
(2)
operation (LOW: 100 mA, HIGH: 500 mA).
PGND
PSEL
19
4
—
I
Analog ground for DAC, OSC and PLL
(1)
Power source select. (LOW: self-power, HIGH: bus-power)
SSPND
TEST0
TEST1
27
26
25
10
13
20
16
18
7
O
I
Suspend flag, active LOW (LOW: suspend, HIGH: operational)
(1)
(1)
Test pin. Must be set HIGH
Test pin. Must be set HIGH
I
V
V
V
V
V
V
V
V
—
—
—
—
—
—
O
O
I
Connect to USB power (V ) for bus-powered operation. Connect to V for self-powered operation.
BUS DD
BUS
CCL
CCP
CCR
COM
DD
(4)
Analog power supply for headphone amplifier of L-channel
(4)
Analog power supply for DAC, OSC and PLL
Analog power supply for headphone amplifier of R-channel
Common voltage for DAC (V
(4)
/2). Connect decoupling capacitor to PGND.
CCP
(4)
Digital power supply
L
OUT
14
15
28
1
DAC analog output for L-channel
DAC analog output for R-channel
R
OUT
(1)
Crystal oscillator input
XTI
XTO
O
—
Crystal oscillator output
ZGND
(1)
11
Ground for internal regulator
LV-TTL level
(2)
(3)
(4)
LV-TTL level, 5-V tolerant
LV-TTL level with internal pulldown
Connect decoupling capacitor to GND. Supply 3.3 V for self-powered applications.
6
TI [ TEXAS INSTRUMENTS ]
