Datasheet
PCM3070
www.ti.com
SLAS724 – FEBRUARY 2011
Multifunction Pins
Table 8 shows the possible allocation of pins for specific functions. The PLL input, for example, can be
programmed to be any of 4 pins (MCLK, BCLK, DIN, GPIO).
Table 8. Multifunction Pin Assignments
1 2 3 4 5 6 7 8
Pin Function MCLK BCLK WCLK DIN DOUT GPIO
MFP3/ MFP4/
MFP1 MFP2 MFP5
SCLK MISO
A PLL Input S
(1)
S
(2)
E S
(3)
B Codec Clock Input S
(1)
,D
(4)
S
(2)
S
(3)
C I
2
S BCLK input S
(2)
,D
D I
2
S BCLK output E
(5)
E I
2
S WCLK input E, D
F I
2
S WCLK output E
G I
2
S ADC word clock input E E
H I
2
S ADC WCLK out E E
I I
2
S DIN E, D
J I
2
S DOUT E, D
K General Purpose Output I E
K General Purpose Output II E
K General Purpose Output III E
L General Purpose Input I E
L General Purpose Input II E
L General Purpose Input III E
M INT1 output E E E
N INT2 output E E E
Q Secondary I
2
S BCLK input E E
R Secondary I
2
S WCLK in E E
S Secondary I
2
S DIN E E
T Secondary I
2
S DOUT E
U Secondary I
2
S BCLK OUT E E E
V Secondary I
2
S WCLK OUT E E E
W Reserved
X Aux Clock Output E E E
(1) S
(1)
: The MCLK pin can be used to drive the PLL and Codec Clock inputs simultaneously
(2) S
(2)
: The BCLK pin can be used to drive the PLL and Codec Clock and audio interface bit clock inputs simultaneously
(3) S
(3)
: The GPIO/MFP5 pin can be used to drive the PLL and Codec Clock inputs simultaneously
(4) D: Default Function
(5) E: The pin is exclusively used for this function, no other function can be implemented with the same pin (e.g. if GPIO/MFP5 has been
allocated for General Purpose Output, it cannot be used as the INT1 output at the same time)
Analog Audio I/O
The analog I/O path of the PCM3070 features a large set of options for signal conditioning as well as signal
routing:
• 6 analog inputs which can be mixed and/or multiplexed in single-ended and/or differential configuration
• 2 programmable gain amplifiers (PGA) with a range of 0 to +47.5dB
• 2 mixer amplifiers for analog bypass
• 2 low power analog bypass channels
• Mute function
• Automatic gain control (AGC)
• Channel-to-channel phase adjustment
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