Lpc2000

Hi everyone.

I'm so pleased to find the LPC user group here on yahoo as i've been looking
for info about the LPC2106 for quite some time.

Allow me to introduce my self.

My name is Lasse Madsen im an electronics engineering apr. from Aalborg,
Denmark.
Im daily involved with Atmel AVR software development in C / Asm. I decided
to try the LPC series on an excisting AVR design to see if there where major
differences regarding speeds etc.

I have the ARM Embedded Toolkit compiler as I've been using Samsung's B0X44
multimedia ARM processors I guess it should also work with the LPC ?

Are there any tools availble for calculating timers, uarts etc. ?

I know its much to ask, but if I ask very polite can I pursuade anyone to
take a brief look at my schematic to see if i've forgotton or was unaware of
any twinkles about the LPC connections !?

I dont use the internal RTC as the LPC doesnt have a battery backup pin !?

I hope i can contribute to this forum as soon as I've got my board up and
running :D

Best regards and a happy christmas to everyone !

Lasse Madsen
Denmark

----- Original Message ----- 

From: "Lasse Madsen" <lm@...>
To: <lpc2100@yahoogroups.com>
Sent: Thursday, December 18, 2003 8:41 AM
Subject: [lpc2100] Hi all.


> Hi everyone.
>
> I'm so pleased to find the LPC user group here on yahoo as i've been
looking
> for info about the LPC2106 for quite some time.
>
> Allow me to introduce my self.
>
> My name is Lasse Madsen im an electronics engineering apr. from Aalborg,
> Denmark.
> Im daily involved with Atmel AVR software development in C / Asm. I
decided
> to try the LPC series on an excisting AVR design to see if there where
major
> differences regarding speeds etc.
>
> I have the ARM Embedded Toolkit compiler as I've been using Samsung's
B0X44
> multimedia ARM processors I guess it should also work with the LPC ?
>
> Are there any tools availble for calculating timers, uarts etc. ?
>
> I know its much to ask, but if I ask very polite can I pursuade anyone to
> take a brief look at my schematic to see if i've forgotton or was unaware
of
> any twinkles about the LPC connections !?

Welcome to the group, Lasse.

Philips recommends larger capacitors on the crystal (they have a table in
the user manual): 68 pF for 10 MHz. I couldn't find them in 0805 so I use 56
pF. They don't mention a resistor across the crystal.

I'd include the JTAG connector, it'll make debugging much easier. You'll
need a Wiggler or equivalent, of course.

Fixed voltage regulators (1.8 V ones are difficult to find), will simplify
the circuit a lot.

I'd use a MAX202 (100n capacitors) or a MAX3232 (3.3V) for the RS-232. You
won't need the pullups for the latter, of course.

The LCD should work off 3.3V (the Powertip ones I use do), although you
might need a -ve supply to get the contrast control to work properly.

That's all I can think of.

Check your '2106 connections against my (much simpler) schematic, I know
mine works. 8-)

Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html

--- In lpc2100@yahoogroups.com, "Leon Heller" <leon_heller@h...> wrote:

> 
> Philips recommends larger capacitors on the crystal (they have a
table in
> the user manual): 68 pF for 10 MHz. I couldn't find them in 0805 so
I use 56
> pF. They don't mention a resistor across the crystal.

The above should read 56 pF and 47 pF respectively.

Leon

A trick I use:  Use an extra channel on the RS-232 driver to provide 
the negative voltage required for the LCD.  Just tie the 
corresponding input high to get ~-8V on the output.

Richard


--- In lpc2100@yahoogroups.com, "Leon Heller" <leon_heller@h...> 
wrote:
> 
> ----- Original Message ----- 
> From: "Lasse Madsen" <lm@h...>
> To: <lpc2100@yahoogroups.com>
> Sent: Thursday, December 18, 2003 8:41 AM
> Subject: [lpc2100] Hi all.
> 
> 
> > Hi everyone.
> >
> > I'm so pleased to find the LPC user group here on yahoo as i've 
been
> looking
> > for info about the LPC2106 for quite some time.
> >
> > Allow me to introduce my self.
> >
> > My name is Lasse Madsen im an electronics engineering apr. from 
Aalborg,
> > Denmark.
> > Im daily involved with Atmel AVR software development in C / Asm. 
I
> decided
> > to try the LPC series on an excisting AVR design to see if there 
where
> major
> > differences regarding speeds etc.
> >
> > I have the ARM Embedded Toolkit compiler as I've been using 
Samsung's
> B0X44
> > multimedia ARM processors I guess it should also work with the 
LPC ?
> >
> > Are there any tools availble for calculating timers, uarts etc. ?
> >
> > I know its much to ask, but if I ask very polite can I pursuade 
anyone to
> > take a brief look at my schematic to see if i've forgotton or was 
unaware
> of
> > any twinkles about the LPC connections !?
> 
> Welcome to the group, Lasse.
> 
> Philips recommends larger capacitors on the crystal (they have a 
table in
> the user manual): 68 pF for 10 MHz. I couldn't find them in 0805 so 
I use 56
> pF. They don't mention a resistor across the crystal.
> 
> I'd include the JTAG connector, it'll make debugging much easier. 
You'll
> need a Wiggler or equivalent, of course.
> 
> Fixed voltage regulators (1.8 V ones are difficult to find), will 
simplify
> the circuit a lot.
> 
> I'd use a MAX202 (100n capacitors) or a MAX3232 (3.3V) for the RS-
232. You
> won't need the pullups for the latter, of course.
> 
> The LCD should work off 3.3V (the Powertip ones I use do), although 
you
> might need a -ve supply to get the contrast control to work 
properly.
> 
> That's all I can think of.
> 
> Check your '2106 connections against my (much simpler) schematic, I 
know

> mine works. 8-)
> 
> Leon
> --
> Leon Heller, G1HSM
> Email: aqzf13@d...
> My low-cost Philips LPC210x ARM development system:
> http://www.geocities.com/leon_heller/lpc2104.html