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TS3A27518E: TS3A27518E: NC to COM has some issue

Max CHANNG
Prodigy 120 points
Part Number: TS3A27518E

Hi All,

We have some issues that need your help.

We found that "NC" to "COM" has a high fail rate. "NO" to "COM" always test pass.

We also had changed input as "NC" connect to I2S5 & "NO" connect to I2S3. It still fail on "NC" to "COM"

 

The structure is a loop test for I2S as below.

  • 0
    TI__Expert 5660 points

    Hello,

    Thank you for reaching out and providing the block diagram and schematic.

    • Could you describe what behavior is indicating a "fail"?
    • Does this behavior occur on every NC/COM channel path (1 - 6)?
    • What voltages do you read on NC and COM?
    • When NC and COM signal path is "ON", what is the measured voltage on the control pins IN1, IN2?

    Thank you and best regards,
    Kate

  • 0 in reply to Kate Dickson
    Prodigy 120 points

    Hi Kate,

    1.Please refer to 2 txt files. It's a test pass & fails log.

    We will output a signal (I2S3 & I2S5) and the CPU input the signal(I2S6). After the CPU receive the signal, the CPU will compare whether the signal is the same or not.

    Pass log:

    I2S5 to I2S6 pass.txt 
    [SYS ] iface=[audio-4], cmd=[audio], host arg=[--port 4] client arg=[--port 4]
[SYS ] testing...[audio]
[APP ] [AUDIO] AUDIO test on A/B
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7fad6cb000.
[APP ] Read at address  0x10830080 (0x7fad6cb080): 0x100111F1
[APP ] Write at address 0x10830080 (0x7fad6cb080): 0x100111F1, readback 0x100111F1
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7fb4f09000.
[APP ] Read at address  0x10830084 (0x7fb4f09084): 0x000000E9
[APP ] Write at address 0x10830084 (0x7fb4f09084): 0x000000C9, readback 0x000000C9
[APP ] 1+0 records in
[APP ] 4+0 records out
[APP ] 2048 bytes (2.0 kB, 2.0 KiB) copied, 0.000216577 s, 9.5 MB/s
[APP ] Simple mixer control 'ABOX UAIF0 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS0_SET'
[APP ] Simple mixer control 'ABOX NSRC0',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF0 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF1 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS1_SET'
[APP ] Simple mixer control 'ABOX NSRC1',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF1 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF2 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS2_SET'
[APP ] Simple mixer control 'ABOX NSRC2',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF2 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF3 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS3_SET'
[APP ] Simple mixer control 'ABOX NSRC3',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF3 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF6 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS6_SET'
[APP ] Simple mixer control 'ABOX NSRC6',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF6 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF4 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'SIFS14_SET' 'SIFS15_SET'
[APP ]   Item0: 'SIFS14_SET'
[APP ] Simple mixer control 'ABOX UAIF5 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'SIFS14_SET' 'SIFS15_SET'
[APP ]   Item0: 'SIFS15_SET'
[APP ] Simple mixer control 'ABOX UAIF4 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'SIFS14_SET' 'SIFS15_SET'
[APP ]   Item0: 'SIFS15_SET'
[APP ] Simple mixer control 'ABOX UAIF5 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'SIFS14_SET' 'SIFS15_SET'
[APP ]   Item0: 'SIFS14_SET'
[APP ] 1+0 records in
[APP ] 1+0 records out
[APP ] 1536000 bytes (1.5 MB, 1.5 MiB) copied, 0.00323719 s, 474 MB/s
[APP ] Playing raw data 'z_testfile_z' : Signed 32 bit Little Endian, Rate 48000 Hz, Channels 8
[APP ] Recording raw data '/tmp/rec.bin' : Signed 32 bit Little Endian, Rate 48000 Hz, Channels 8
[APP ] cmp: EOF on testfile after byte 2048, in line 11
[APP ] SIGUSR1 to main
[APP ]  export file(gpio125) exist
[APP ] 
[APP ] prepend/append 1sec of zero samples around testfile
[APP ] 
[APP ] use calculated recording time of 2 second(s), (at 48000 samples/sec)
[APP ] 
[APP ] recording 2 second(s)
[APP ] recording finished.
[APP ] waiting until playback finishes...
[APP ] playback finished.
[APP ] look for testfile content in recorded data
[APP ] comparing at position: 752384
[APP ] comparison successful:
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7f846b0000.
[APP ] Read at address  0x10830080 (0x7f846b0080): 0x100111F1
[APP ] Write at address 0x10830080 (0x7f846b0080): 0x100111F1, readback 0x100111F1
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7f88978000.
[APP ] Read at address  0x10830084 (0x7f88978084): 0x000000E9
[APP ] Write at address 0x10830084 (0x7f88978084): 0x000000C9, readback 0x000000C9
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7f9e26f000.
[APP ] Read at address  0x10830080 (0x7f9e26f080): 0x100111F1
[APP ] Write at address 0x10830080 (0x7f9e26f080): 0x100111F1, readback 0x100111F1
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7fa4930000.
[APP ] Read at address  0x10830084 (0x7fa4930084): 0x000000E9
[APP ] Write at address 0x10830084 (0x7fa4930084): 0x000000C9, readback 0x000000C9
[APP ] [AUDIO] compare success
[APP ] SIGUSR1 to main
[APP ]  export file(gpio193) exist
[APP ]  export file(gpio190) exist
[APP ] now:GPIO_Init_Direction_IO_AB()
[APP ] now:GPIO_Output_Low_AB()
[APP ] now:GPIO_Input_Low_AB_check()
[APP ] now:GPIO_Output_High_AB()
[APP ] now:GPIO_Input_High_AB_check()
[APP ] [GPIO] XAUD_I2S6_SD0(AB OUT)<-OK->XAUD_I2S5_SD1(AB IN)
[APP ] SIGUSR1 to main
[SYS ] RESULT: error code 0
[SYS ] test end...[audio], ret=0
[SYS ] test complete, sending report audio-4, result=86
[SYS ] Client report

    Fail log:

    I2S3 to I2S6 fail.txt 
    [SYS ] iface=[audio-2], cmd=[audio], host arg=[--port 2] client arg=[--port 2]
[SYS ] testing...[audio]
[APP ] [AUDIO] AUDIO test on A/B
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7f88d2b000.
[APP ] Read at address  0x10830080 (0x7f88d2b080): 0x100111F1
[APP ] Write at address 0x10830080 (0x7f88d2b080): 0x100111F1, readback 0x100111F1
[APP ] /dev/mem opened.
[APP ] Memory mapped at address 0x7f8423f000.
[APP ] Read at address  0x10830084 (0x7f8423f084): 0x000000E8
[APP ] Write at address 0x10830084 (0x7f8423f084): 0x000000C8, readback 0x000000C8
[APP ] 1+0 records in
[APP ] 4+0 records out
[APP ] 2048 bytes (2.0 kB, 2.0 KiB) copied, 0.000220693 s, 9.3 MB/s
[APP ] Simple mixer control 'ABOX UAIF0 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS0_SET'
[APP ] Simple mixer control 'ABOX NSRC0',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF0 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF1 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS1_SET'
[APP ] Simple mixer control 'ABOX NSRC1',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF1 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF2 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS2_SET'
[APP ] Simple mixer control 'ABOX NSRC2',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF2 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF3 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS3_SET'
[APP ] Simple mixer control 'ABOX NSRC3',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF3 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF6 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' 'SIFS0_SET' 'SIFS1_SET' 'SIFS2_SET' 'SIFS3_SET' 'SIFS4_SET' 'SIFS5_SET' 'SIFS6_SET' 'SIFS7_SET' 'SIFS8_SET' 'SIFS9_SET' 'SIFS10_SET' 'SIFS11_SET'
[APP ]   Item0: 'SIFS6_SET'
[APP ] Simple mixer control 'ABOX NSRC6',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'UAIF0 MAIN MIC' 'UAIF0 SEC MIC' 'UAIF1 MAIN MIC' 'UAIF1 SEC MIC' 'UAIF2 MAIN MIC' 'UAIF2 SEC MIC' 'UAIF3 MAIN MIC' 'UAIF3 SEC MIC' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'NOT_SUPPORT' 'UAIF6 MAIN MIC' 'UAIF6 SEC MIC'
[APP ]   Item0: 'UAIF6 MAIN MIC'
[APP ] Simple mixer control 'ABOX UAIF4 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'SIFS14_SET' 'SIFS15_SET'
[APP ]   Item0: 'SIFS14_SET'
[APP ] Simple mixer control 'ABOX UAIF5 SPK',0
[APP ]   Capabilities: enum
[APP ]   Items: 'NO_CONNECT' '' '' '' '' '' '' '' '' '' '' '' '' '' '' 'SIFS14_SET' 'SIFS15_SET'
[APP ]   Item0: 'SIFS15_SET'
[APP ] 1+0 records in
[APP ] 1+0 records out
[APP ] 1536000 bytes (1.5 MB, 1.5 MiB) copied, 0.00319027 s, 481 MB/s
[APP ] Playing raw data 'z_testfile_z' : Signed 32 bit Little Endian, Rate 48000 Hz, Channels 8
[APP ] Recording raw data '/tmp/rec.bin' : Signed 32 bit Little Endian, Rate 48000 Hz, Channels 8
[INFO] watchdog trigger(overflow), to terminate process audio
[SYS ] test app timeout = 1053
[SYS ] stop test: audio
[SYS ] killall - 0 times
sh: line 1: 24669 Killed                  audio --port 2 --client 2>&1
[APP ] kill: (14881): No such process
[SYS ] RESULT: error code -119
[SYS ] test end...[audio], ret=-1
[SYS ] test complete, sending report audio-2, result=87
[SYS ] Client report
[SYS ] killall - 1 times
[SYS ] killall - 2 times
[SYS ] killall - 3 times
[SYS ] killall - 4 times
[SYS ] killall - 5 times
[INFO] HOST connected


    2.We try to change channel 1&2 to channel 5&6.

    NC still has a high fail rate & NO always passes.

    3 & 4 .We have checked the voltage level on each channel & IN1/IN2 when it tests. Please refer attachment

    There is no signal when the test fails.

    The file "voltage level I2S3_DI-I2S6_DO" is a pass signal(low pass rate).

    COM1 →COM5-I2S3_DO-I2S6_DI

    voltage level CLK

    voltage level FS

    voltage level I2S3_DI-I2S6_DO

    voltage level I2S3_DO-I2S6_DI

  • 0 in reply to Max CHANNG
    TI__Expert 5660 points

    Hello,

    Thank you very much for providing this information.

    If you are seeing no signal at NC, this sounds like the this signal path is still high-impedance or not effectively turning ON. Could you point out the exact levels of IN1, IN2, and /EN when you are attempting to use NC?

    All of these scope shots are from NO path, is that correct? 

    Thanks,
    Kate

  • 0 in reply to Kate Dickson
    Prodigy 120 points

    Hi Kate,

    Sorry, it is unclear to describe the symptom.

    Both NC & NO channels can see the signal.
    But, the signal connects to NC-COM, will have a high failure rate.
    We check the channel 1~6 and IN1/IN2 level as you mention, it still has the symptom on NC.
    The waveform is my last reply.

  • 0 in reply to Max CHANNG
    TI__Expert 5660 points

    Hello,

    To clarify further, you are able to measure a signal at NC when it is connected to COM. But your test program (which compares the signal at COM to the signal at NC) is giving "fail" result. Is this correct?

    The test logs are a little bit difficult for me to understand, could you show me what in the program log indicates a "fail"? Why are you using this particular test method? What are the parameters/criteria of this test program?

    In your waveforms, it looks to me like the output is following the input, as expected. Keep in mind that the switch is not exactly "ideal", there is some on-resistance and internal parasitics (specified in the datasheet). So, if your test program has very low margin, this may be why it gives "fail" outcome.

    Best regards,
    Kate

  • 0 in reply to Kate Dickson
    Prodigy 120 points

    Hi Kate,

    To clarify further, you are able to measure a signal at NC when it is connected to COM. But your test program (which compares the signal at COM to the signal at NC) is giving "fail" result. Is this correct? Ans: Correct

    The test logs are a little bit difficult for me to understand, could you show me what in the program log indicates a "fail"? Why are you using this particular test method? What are the parameters/criteria of this test program?

    Ans: We generate 2KB random test data, send from I2S-3 and receive from I2S-6, but the received data is inconsistent with the sent, so the test fails.

  • 0 in reply to Max CHANNG
    TI__Expert 5660 points

    Hello,

    Thanks for the confirmation. 

    Could you explain more about what you mean by "inconsistent" received data? Do you know if this is inconsistent timing of the data or the voltage level of the data?

    Have you tried using a new device of TS3A27518E? Does the "fail rate" exist with multiple different devices?

    The waveforms you have provided look okay-- the output COM looks like it is sending the input NC unchanged as expected. Waveforms of the input and output of the switch are typically the best way to troubleshoot signal path concerns with the switch.

    Because I do not know how your test program works, I do not know what could be causing a "fail" in your program. You may want to try double-check & debug your testing program.

    Best regards,
    Kate