ReAl

Some of FTDI USB converter chips have MPSSE — hardware engine for implementation of serial interfaces like JTAG, SPI, I2C. FT2232D and previous versions FT2232C, FT2232L support Full-Bandwidth USB and have upper TCK/SCK frequency level 6 MHz. FT2232H, FT4232H, FT232H work in USB 2.0 Hi-Speed mode and have 30 MHz limit.

MPSSE defines DBUS0..DBUS2 as TCK/SCK, TDI/MOSI and TDO/MISO. AVR ISP interface requires RESET signal. DBUS3 (TMS/CS) can be used for this purpose and AVReAl uses it by default.

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avreal v1.28r9 (Tue 2011-12-20) has been released.

• FT232H MPSSE mode support added.
• Delays processing in Windows version changed: lower CPU load for -k/-K switches.
• Resynchronisation method changed for all microcontrollers.
  Resync process started with one attempt of RESET pulse method then continued with SCK pulse method.
  More about synchronisation.

avreal v1.28r1 (Sun 2010-01-31) has been released.

• FT2232H, FT4232H support is added. Both channels with MPSSE are allowed for programming. Allowable pin names are listed in configuration description.
• Switch -k is added for waiting an adapter’s key being pressed before starting the programming. See key record description.
• Switch modifier -os is added for selecting SCK frequency instead of MCU clocking frequency.