Datasheet
TAS2505
SLAS778A –FEBRUARY 2013–REVISED FEBRUARY 2013
www.ti.com
5.3.3 Multifunction Pins
Table 5-1 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 5-1. Multifunction Pin Assignments
1 2 3 4 5 6 7
Pin Function MCLK BCLK WCLK DIN GPIO SCLK MISO
/DOUT
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 DIN E, D
I General Purpose Output I E
I General Purpose Output II E
J General Purpose Input I E
J General Purpose Input II E
J General Purpose Input III E
K INT1 output E E
L INT2 output E E
M Secondary I
2
S BCLK input E E
N Secondary I
2
S WCLK input E E
O Secondary I
2
S DIN E E
P Secondary I
2
S BCLK OUT E E
Q Secondary I
2
S WCLK OUT E E
R Secondary I
2
S DOUT E
S Aux Clock Output E E
(1) S
(1)
: The MCLK pin can drive the PLL and Codec Clock inputs simultaneously.
(2) S
(2)
: The BCLK pin can drive the PLL and Codec Clock and audio interface bit clock inputs simultaneously.
(3) S
(3)
: The GPIO/DOUT pin can 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. (If GPIO/DOUT has been
allocated for General Purpose Output, it cannot be used as the INT1 output at the same time.)
5.4 Audio Analog I/O
The TAS2505 features a mono audio DAC. It supports a wide range of analog interfaces to support
different headsets such as 16-Ω to 200-Ω impedance and analog line outputs. TheTAS2505 can drive a
speaker upto 4-Ω impedance.
5.5 Analog Signals
The TAS2505 analog signals consist of:
• Analog inputs AINR and AINL, which can be used to pass-through or mix analog signals to output
stages
• Analog outputs class-D speaker driver and headphone/lineout driver providing output capability for the
DAC, AINR, AINL, or a mix of the three
20 Application Overview Copyright © 2013, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links: TAS2505