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Future CAN microcontrollers

Started by Varuzhan Danielyan March 30, 2005
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


An Engineer's Guide to the LPC2100 Series


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@lpc2..., "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 >



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@lpc2...
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@lpc2..., "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 >

------
Yahoo! Groups Links

a.. To



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@lpc2..., "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@lpc2...
> 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@lpc2..., "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
> >
> >
> >
>
> --------------------------------
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