Hi everybody,
I am going to start two projects; one with Coldfire V1 (MCF51MM128CLK) and one with Coldfire V2(MCF52252AF80)
I have attached two schematics.
Could someone tell me if there is any error between the controller and debugger connector?
Also I am not sure where the ALLPST pin of coldfire V2 should be connected.
Thanks
Nikos
Download every development board schematic you can find and see how things are connected. there. Copy them slavishly.
1.5.2 Integrated Debug Module
The device includes a new debug signal, ALLPST. This signal is the logical AND
of the processor status (PST[3:0]) signals and is useful for detecting when the
processor is in a halted state (PST[3:0] = 1111).
Does your debugger need DDATA[3:0] and PST[3:0]? Does it need ALLPST as well or instead?
Note "33.4.6 Freescale-Recommended BDM Pinout" shows 23 of the 26 pins connected. You have 13. That my be what you want, but check. Your debugger manual might clear this up.
I don't like your power-on circuitry. THe chip has "low voltage detect" forcing reset, but it doesn't trigger until 2.15V, and the CPU isn't rated to run at under 3.0V. I think you need an external reset generator on RSTI, so it mightn't survive or recover from a brownout.
Why are you adding pulldowns on all those pins? You don't need to pull any pin you can program as an output and force high or low.
Tom