Texas Instruments TLV320AIC26EVM, User Manual

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I/O Connector and Signals
3-6
3.3.3 External Power Connectors
While it is most convenient to power the AIC26EVM from the USB bus,
external power supplies can be used. The two connectors detailed in
Table 3−5 are provided for the external power.
Table 3−5. External Power Connectors
Reference
Designator Description Pin
Number Signal Name
J9 External power 1 6 VDC to 10 VDC input
terminal block
2 Ground
J10 External power jack − 6 VDC to 10 VDC input, positive center terminal
3.3.4 External Audio Data (I
2
S) Connector
The I
2
S bus, which carries audio data to and from the AIC26, is brought out
to header J11 and can be connected to external I
2
S devices if the I
2
S interface
to the on-board TAS1020B is disabled.
Table 3−6. Audio Data Connector
Reference Designator Description Pin Number Signal Name
1 MCLK
3 BCLK
5 LRCLK
J11 Audio data (I
2
S) connector
7 I2SDIN
J11 Audio data (I S) connector
9 I2SDOUT
11 PWD/AWDS
2,4,6,8,10,12 Ground
3.3.5 External SPI Connector
The AIC26 SPI port is brought out to the J12 header. It can be driven by an
external source if the onboard microprocessor is disabled.
Table 3−7. External SPI Connector
Reference
Designator
Description
Pin
Number Signal
Name
Function
1 RESET Reset line
3 SS Slave select for SPI bus.
5 SCLK Serial clock for SPI bus.
External SPI
7 MOSI
Master out, slave in data line for SPI bus. Data
travels to the AIC26 over this line.
J12
External SPI
Bus
9 MISO
Master in, slave out data line for SPI bus. Data
travels from the AIC26 over this line.
11 PENIRQ AUX, BAT1, BAT2 data available (DAV) interrupt.
2, 4, 6, 8,
10, 12
GND Ground