Lpc2000

Frank Sergeant [frank@...]  wrote:

 > "NMI Sales" <nmisales@...> writes:

 > > Announcing the Tini2131(tm) for only $29!!!

 > I was tickled to stumble across this yesterday
when I was browsing the
 > NMI site.  The price isn't bad; the size is
great.

Glad you like it !

 > > The  LPC2131 has 32K Flash and 8K RAM.

> But, I wondered, why choose the smallest of the
LPC213x series?  It's
> the same work to build the board, etc. etc.
Wouldn't it be better to
> put the LPC2138 chip on it instead?  Or, at
least, offer it with a
> choice of LPC213x variants?

Actually we have the LPC2138 available too. We
wanted to offer a board for everyone at a very
attractive price and in order to do so, had to
work in significant quantities. The LPC2131 worked
as a good baseline choice.

>> ...  Tini2131(tm) has 16 of the best I/O pins
of the LPC2131 brought out

> Also, even though I love the small size of the
TiniXXXX boards, aren't
> we throwing away a *lot* of the LPC213x I/O
pins?  (I don't know what to
> suggest.)
> Inquiring minds want to know.

I think we did pretty good in getting as many
versatile I/O out on a very small board while
still maintaining standard 0.1 spaced dual row
header connection. We do have the Plug-an-ARM
using the LPC2106 that has more pins, but check
the Tini2131 the pin out :

MCU side
P0.18   P0.18/CAP1.3/MISO1/MAT1.3
P0.17   P0.17/CAP1.2/SCK1/MAT1.2
P0.14   P0.14/EINT1/SDA1
P0.6    P0.6/MOSI0/CAP0.2
P0.5    P0.5/MISO0/MAT0.1/AD0.7
P0.26   P0.26/AD0.5
P0.30   P0.30/AD0.3/EINT3/CAP0.0
P0.28   P0.28/AD0.1/CAP0.2/MAT0.2
GND
ATN     Serial DTR reset control signal
SI      Serial Input  to the Tini2131, RS232
levels
SO      Serial Output from the Tini2131, RS232
levels

Bottom
P0.20   P0.20/MAT1.3/SSEL1/EINT3
P0.19   P0.19/MAT1.2/MOSI1/CAP1.2
P0.11   P0.11/CAP1.1/SCL1
P0.7    P0.7/SSEL0/PWM2/EINT2
P0.4    P0.4/SCK0/CAP0.1/AD0.6
P0.25   P0.25/AD0.4
P0.29   P0.29/AD0.2/CAP0.3/MAT0.3
P0.27   P0.27/AD0.0/CAP0.1/MAT0.1
+5V
RST     Tini2131 Reset signal, active low
GND
Vin

- J3 I2C-0 -
SCL     P0.2/SCL0/CAP0.0
GND
SDA     P0.3/SDA0/MAT0.0/EINT1

- J2 JTAG - 2 by 5
+3.3V GND
TDI   RTCK      P1.28   P1.26
TDO   TMS       P1.27   P1.30
TCK   P0.8      P1.29   P0.8
RST   TRST      RESET   P1.31

- LED indicators -
P1.21
P1.22
P1.23



> --
> Frank
> Riscy Pygness -- Pygmy Forth for the ARM
> http://pygmy.utoh.org/riscy

nmisales@...
www.newmicros.com



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