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Original question:

AM5728: McASP7 noise issue

AM5728： McASP connection

Kanae
Guru 10275 points

Part Number: AM5728

Hi Support Team,

Please make sure that there is no problem with the McASP connection of the custom board.
The specifications of the custom board are as follows

Terminal Direction Connection
XO_OSC1 output Not connected
XI_OSC1 input Connected to ground
Note: SYS_CLK2 connection is not necessary for AM5728 because it is not the clock master for audio in the system.
　 　 　
*1 MCASP6_ACLKX input 2.8224MHz (64 times 44.1kHz) is supplied from the customer sound source system.
*2 MCASP6_FSX  input 44.1kHz is supplied from the customer sound source system.
MCASP6_AXR0 input Input I2S format audio signal synchronized with MCASP6_ACLKX.
MCASP6_AXR1 output Output I2S format audio signal synchronized with MCASP6_ACLKX.
Note: MCASP_ACLKXCTL 0x4847_40B0 bit[5]=0x0: The clock source for external transfer is the bit clock from the ACLKX pin.
　 　 　
*1 MCASP7_ACLKX input 2.8224MHz (64 times 44.1kHz) is supplied from the customer sound source system.
*2 MCASP7_FSX input 44.1kHz is supplied from the customer sound source system.
MCASP7_AXR1 input Input I2S format audio signal synchronized with MCASP7_ACLKX.
Note: MCASP_ACLKXCTL 0x4847_80B0 bit[5]=0x0: The clock source for external transfer is the bit clock from the ACLKX pin.

*1: Same clock are connected in parallel.
*2: Same clock are connected in parallel

Please let us know if there is any other information you need.

Best regards,
Kanae

  • +1
    TI__Guru 56555 points

    OSC1 is optional for AM57x devices. (OSC0 is required)

    For McASP ports, ACLK can be configured as either input or output.  Both are supported (OK)

    Frame Sync (FSX) can be configured as either input or output.  Both are supported (OK)

    AXR bits can each be configured as either input or output.  (OK)

    Do you have any additional questions/concerns?