DS89C450 programming (again ? :P)

[chupos]

replaced crystal osc., checked Capacitors... everything seems ok :/

Added after 28 seconds:

but just the same problem as before

 

[abionnnn]

Hmmm there are a few ways to test it, but you'll need extra chips. If you have a 4040 or equivelent you can downclock your chip and blink an LED

 

[chupos]

well, k, gonna wait for the MAX233 to come and test it again then, thanks both for your help
Anyways I don't find any problem in my schematics...

 

[glenjoy]

Btw, have you checked your DS232 if it is really driven by the serial port, you can connect one into DTR I think and check it when you connect via hyperterminal if the pin state changes state on the TTL side.

 

[IanP]

If you use MTK and 11,0952MHz quarz the proper communication between PC and DS89C450/4.. can be established at 14,400bps.. so configure your serial port for that speed.

Before you try to establish communication DO NOT FORGET aboyt setting TARGET CONFIGURATION Flash Security to Level 1 (if you leave Level4 you will lock the security bits).
With all this done you can press CTR+L = connect to loader (or TARGET ...) and you will see the following:

DS89C450 LOADER VERSION 2.1 COPYRIGHT (C) 2002 DALLAS SEMICONDUCTOR<0D><0A>
> 89C450 LOADER VERSION 2.1 COPYRIGHT (C) 2002 DALLAS SEMICONDUCTOR
> R<0D><0A>
R<0D><0A>
LB:00 OCR:FF ACON:1F CKCON:01 P0:FF P1:FF P2:FF P3:FF FCNTL:B1<0D><0A>
>W CKCON 0<0D><0A>
W CKCON 0<0D><0A>
<0D><0A>
> W ACON E0<0D><0A>
W ACON E0<0D><0A>
<0D><0A>
> W OCR 0<0D><0A>
W OCR 0<0D><0A>
<0D><0A>
> W LB 7<0D><0A>
W LB 7<0D><0A>
<0D><0A>
>

Now you will be conected ...

 

[dientuso]

Should use Kit 00 of DS89c540
i can't buy 7.36 M
i use 11.0592 and config speed at 57600
it's okay