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TMS320F28376S: use SPI High speed mode

Part Number: TMS320F28376S

Dear Sir ,

we are developing controller base on 28376S  Chip , and  using SPI communication  + RS422 trancivers to communicate with extreanl end equipment

1. we recentaly came acrros endequipment that requires from us to work in SPI  frequency  of ~8Mbps   , the 28376S  by iteslef can generate such frequency 

  but due to propregation delay of the RS422 trancivers  , it  is not possiable

2.on 28376S  the Setup delay of SPISOMI is 20ns     while in high speed mode  Setup time is 5ns  , but there are also hold time of 5ns'

is it  possiable to switch to High Speed SPI mode from Normal mode  , even tough the GPIOs that are used is not meant for High Speed SPI ?   

the purpose is just to shorten the setup time  from 20ns to samller vlaue   , without incresing the frequency (max 8Mbps)

  • Hi Eyal,

    Eyal Saban1 said:
    is it  possiable to switch to High Speed SPI mode from Normal mode  , even tough the GPIOs that are used is not meant for High Speed SPI ? 

    Unfortunately, no. High-speed mode is only supported on the designated SPI high-speed pins.