Lpc2000

Varuzhan,

don't count on pin 17 (look at LPC2138). Most likely pin 17 will 
remain P0.31 (output only). Also important P0.31 MUST NOT BE LOW 
during reset. Doing so will render te device in an undefined state. 

Robert

--- In lpc2000@yahoogroups.com, "Varuzhan Danielyan" <dan@x> wrote:
> Dear Robert,
> 
> Thank you very much. You write:
>     The power pins will be kept at the same pins.
> I understand it that the pin 17 will remain a power pin
> and I can without risk directly connect it to pins 49 and 63.
> Am I right?
> 
> Thank you in advance,
> Varuzhan
> 
> 
>   ----- Original Message ----- 
>   From: philips_apps 
>   To: lpc2000@yahoogroups.com 
>   Sent: Wednesday, March 30, 2005 11:31 AM
>   Subject: [lpc2000] Re: Future CAN microcontrollers
> 
> 
> 
>   Varuzhan,
> 
>   the CAN device has not been defined yet. Every effort has been 
made 
>   to keep changes to the PCB minimized. This will also be the case 
for 
>   a device similar to the LPC2138 but with CAN. 
> 
>   The power pins will be kept at the same pins. The challenge is 
going 
>   to be that CAN pins are on the same pins as the 32 kHz input of 
the 
>   RTC. 
> 
>   Understanding your desire to know which pins are going to be 
what, 
>   please accept my apologies not knowing the exact pinconfiguration 
>   yet. 
> 
>   Robert
> 
>   --- In lpc2000@yahoogroups.com, "Varuzhan Danielyan" <dan@x> 
wrote:
>   > My question is for Philips group.  Some time ago on this forum 
was
>   > information, that Philips plans to start this year production 
of USB
>   > and then new CAM (LPC2139?) microcontrollers.  Now I am 
finishing a 
>   > design of a new module with the LPC2129 and want to make the 
PCB,
>   > if possible, to be compatible with the future CAM 
microcontroller.
>   > I examined the LPC2138 documentation, and noticed, that only 
pin 17
>   > has another functionality.  Pins 49 and 63 are still power, 
only 
>   3.3V
>   > instead of 1.8V.
>   > Now my question.  I put a 0 Ohm resistor between the pin 17 and
>   > pins 49, 63.  In case of the LPC2129 I will mount it and 
connect all
>   > them to 1.8V source and for future microcontroller the resistor 
>   should
>   > not be mounted and 49,63 pins I will connect to 3.3V source.  Is
>   > my guess right?
>   > I am sure, that the answer will be of common interest.
>   > Great thanks in advance,
>   > 
>   > Varuzhan
>   >  
>   > 
>   > [Non-text portions of this message have been removed]
> 
> 
> 
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