Re: ISP issues

On Fri, Feb 27, 2004 at 11:10:44PM -0500, David Willmore wrote:

> I'm trying to program a large number of 90S2313s, so
> I knocked up a ZIF socket to a 6 pin header and put
> in a little power supply.
> 
> I tested the wiring and it seems to be right, but
> neither of the ISP capable programmers I have--
> STK500 and an AVRisp--seems to want to touch it.
> They read back the target voltage just fine, but
> fail to go into program mode.
> 
> Is there anything special that needs to be in the
> target for an ISP programmer to work?  Pullup 
> resistors or anything?
> 
> I used a VOM to verify that my fixture matches
> the connections in the STK500 on the Vcc, GND,
> RESET, SCK, MISO, and MOSI pins.  Do I need anything
> else?

Clock source - crystal, resonator, external clock or something.  I
don't think the AT90S2313's have a built-in oscillator.

-Brian
-- 
Brian Dean, [email protected]
BDMICRO - MAVRIC & MAVRIC-II ATmega128 Based Dev Boards
http://www.bdmicro.com/