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Blue trace is CBUS0 TXDEN Red is TX “T” character

Nov 14, 2009. revisiting programming U232R FTDI USB chip for Thermal Denuder with CN7500 Omega controllers. Blue trace is CBUS0 TXDEN Red is TX “T” character CBUS0 is programmed in EEPROM as TXDEN for RS485 use.

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Blue trace is CBUS0 TXDEN Red is TX “T” character

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  1. Nov 14, 2009. revisiting programming U232R FTDI USB chip for Thermal Denuder with CN7500 Omega controllers Blue trace is CBUS0 TXDEN Red is TX “T” character CBUS0 is programmed in EEPROM as TXDEN for RS485 use Use this utility to program EEPROM. D:\John\VS_FTDI_Example\MProg 3.5 Release\MPROG.exe

  2. See D:\John\VS_FTDI_Example\RS485_DS_FT232R_V204.pdf pg 27 TxDEN defaults on CBUS2 Seems I don’t need to use PWREN# (CBUS3) But I have reprogrammed CNUS0 to be TxDEN Use CBUS1, 2, 3 for GPIO, fan control, etc

  3. See D:\John\VS_FTDI_Example\RS485_DS_FT232R_V204.pdf pg 12 for CBUS pin options

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