Place MC68332 in high impedance

chriscrde — Mon, 23 Apr 2007 19:50:24 GMT

Hello,

I'm developping a board test in boundary scan and i need to place an MC68332 in high impedance in order to test adress and data bus of the board.

I think that i have to use the TSC pin but I don't know how to use it. The document M68331/332TUT/D says that :

Driving this pin to approximately 1.6 times causes the MCU to place all output drivers in a high-impedance state, isolating the MCU from the rest of the system.

But it doesn't work.

Can you say me how to do ?

Thanks

Re: Place MC68332 in high impedance

macl — Mon, 30 Apr 2007 23:27:31 GMT

Hi,

The TSC signal must remain asserted (1.6*VDD) for approximately ten clock cycles in order for drivers to change state. This is 8V for 5V VDD. Just don't go over 9V.

Thanks,

Mac

topic Re: Place MC68332 in high impedance in ColdFire/68K Microcontrollers and Processors

Place MC68332 in high impedance

Re: Place MC68332 in high impedance