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how to disable sn65dsi86 ASSR funtion？

user4797112
Prodigy 50 points
Other Parts Discussed in Thread: SN65DSI86, TEST2

Hi,

       I can driver my old LCD  panel,but can not driver the other new panel by sn65dsi86 ,because it have no ASSR funtion.How can i how to disable sn65dsi86 ASSR funtion？

       I try to disable the ASSR through pull up TEST2 pin to 1.8V ,but it can not change the 0x5A reg value . Please help me.thanks.

  • 0
    TI__Mastermind 18655 points

    Hello, 

     Use attached script.  Make sure TEST2 pin is high at rising edge of EN.  This is described in the datasheet.

    Fullscreen ASSR_DISABLE.xml Download 
    <aardvark>
    <configure i2c="1" spi="1" gpio="0" tpower="1" pullups="0"/>
    <i2c_bitrate khz="100"/>

======Page 7======
   <i2c_write addr="0x2D" count="1" radix="16">FF 07</i2c_write> />

======ASSR Control to RW from R-only.  TEST2 pin must be high at rising edge of EN pin ======
   <i2c_write addr="0x2D" count="1" radix="16">16 01</i2c_write> />

======Page 0======
  <i2c_write addr="0x2D" count="1" radix="16">FF 00</i2c_write> />
  
======enhanced framing enable.  NO ASSR ======
  <i2c_write addr="0x2D" count="1" radix="16">5A 04 </i2c_write> />

</aardvark>

    Refer to ASSR_CONTROL register.

    Regards,

    Joel

  • 0 in reply to Joel Jimenez0
    Prodigy 50 points
    thank you.
    -------------------------------------------------------
    - <aardvark>
    <configure i2c="1" spi="1" gpio="0" tpower="1" pullups="0" />
    <i2c_bitrate khz="100" />
    ======Page 7======
    <i2c_write addr="0x2D" count="1" radix="16">FF 07</i2c_write>
    /> ======ASSR Control to RW from R-only. TEST2 pin must be high at rising edge of EN pin ======
    <i2c_write addr="0x2D" count="1" radix="16">16 01</i2c_write>
    /> ======Page 0======
    <i2c_write addr="0x2D" count="1" radix="16">FF 00</i2c_write>
    /> ======enhanced framing enable. NO ASSR ======
    <i2c_write addr="0x2D" count="1" radix="16">5A 04</i2c_write>
    />
    </aardvark>

    /> ======ASSR Control to RW from R-only. TEST2 pin must be high at rising edge of EN pin ======
    IS this must use mcu to control Test2 and EN pin?
    Oh,my god! I did not connect the two pins to mcu gpios.
  • 0 in reply to Joel Jimenez0
    Prodigy 50 points
    e2e.ti.com/.../ASSR.png
    My datasheet have no this part，why？ just mention “reserved”