Hello!
I'm trying to embed a FT2232D based programmer into my board with a
STM32 (Cortex-M3 MCU).
I want the programmer to be compatible with jtagkey, so I looked at
schematics of compaible designs.
I noticed that while the JTAG signals (TCK, TDI, TDO, TMS) are only
buffered when translation is necessary, the SRST and TRST signals are
always tri-state buffered, with OE going into the FTDI chip.
Is there a reason for that? Can I omit the buffers?
Also, I heard it's possible to omit the TRST signal and only keep the
SRST signal, because system reset will also reset the TAP controller. Is
that true? Are there problems with that?
Many thanks!
Matthew
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