Texas Instruments TAS5715EVM Evaluation Module TAS5715EVM TAS5715EVM 数据表
产品代码
TAS5715EVM
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OUT B
OUT A
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Installation
Figure 5. BTL Connection
2.1.4
USB Interface
The TAS5715 registers are accessed through I
2
C™ bus lines SDA and SCL. The USB circuit and USB
connector on the MC57xxPSIA board facilitates the connection between a host computer and the device.
The EVM USB circuit is powered by the 5V USB line of the host PC and is independent of the power
supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments.
The EVM USB circuit is powered by the 5V USB line of the host PC and is independent of the power
supplies available on the board. The USB device that is used is a TAS1020B from Texas Instruments.
2.1.5
Digital Audio Interface SPDIF
The Digital Audio Interface SPDIF (RCA/OPTO) accepts digital audio data using the I
2
S protocol. See the
TAS5715 data sheet for more information.
The RCA connector and the OPTO connector are the two SPDIF interfaces on the MC57xxPSIA board.
The switch S3 toggles between the OPTO and RCA connector to accommodate the signal source. When
the RCA cable or optical cable is connected and the signal source is powered up, verify that the SPDIF
lock indicator (blue LED5) illuminates, confirming that a viable signal is available to the device. Install a
jumper on JP4 across the middle pin and the pin marked SPDIF to connect the digital source to SDIN1.
Install a jumper on JP5 to connect the digital source to SDIN2.
The switch S3 toggles between the OPTO and RCA connector to accommodate the signal source. When
the RCA cable or optical cable is connected and the signal source is powered up, verify that the SPDIF
lock indicator (blue LED5) illuminates, confirming that a viable signal is available to the device. Install a
jumper on JP4 across the middle pin and the pin marked SPDIF to connect the digital source to SDIN1.
Install a jumper on JP5 to connect the digital source to SDIN2.
For detailed information on how the data and clocks are provided to the TAS5715, see the schematic
appearing at the end of this document and the DIR9001 device data sheet (
appearing at the end of this document and the DIR9001 device data sheet (
2.1.6
ADC Interface
In the absence of a digital signal source, the PCM1808 ADC can be used to convert an analog audio
signal to a digital signal to the TAS5715. The DIR9001 still provides clock signals to the ADC in this
process. A 12MHz crystal is installed on the MC57xxPSIA board. The ADC is an additional feature of this
board to provide flexibility in sourcing an audio signal to the TAS5715. Review the PCM1808 data sheet
(
signal to a digital signal to the TAS5715. The DIR9001 still provides clock signals to the ADC in this
process. A 12MHz crystal is installed on the MC57xxPSIA board. The ADC is an additional feature of this
board to provide flexibility in sourcing an audio signal to the TAS5715. Review the PCM1808 data sheet
(
) for a detailed description of the ADC on this EVM. Install the jumper on JP4 across the middle
pin and the pin marked ADC to select ADC as the source for SDIN1.
2.1.7
Board Power-Up General Guidelines
Connect the MC-57xx and the TAS5715EVM boards by locating pin 1 on each board, indicated by a small
white triangle. The MC-57xx plugs down onto the TAS5715EVM board (i.e., the TAS5715EVM board fits
underneath the MC57xxPSIA board). Pin 1 on each board must be connected to each other.
white triangle. The MC-57xx plugs down onto the TAS5715EVM board (i.e., the TAS5715EVM board fits
underneath the MC57xxPSIA board). Pin 1 on each board must be connected to each other.
Install the EVM software on the PC before powering up the board. After connecting the loudspeakers or
other loads, power supplies, and the data line, power up the 5V power supply first; then power up the
PVDD power supply. It is recommended initially to set the PVDD level to 10V, then ramp it up to 20V to
verify cable connections.
other loads, power supplies, and the data line, power up the 5V power supply first; then power up the
PVDD power supply. It is recommended initially to set the PVDD level to 10V, then ramp it up to 20V to
verify cable connections.
5
SLOU304 – December 2010
25W Digital Input Amplifier with EQ and 2-Band DRC
© 2010, Texas Instruments Incorporated