AT89c51snd1c

Does anyone know the hardware programming method of the mp3 player
chip, my bootloader is not working and i dont have access to a device
programmer

aravind wrote:
> Does anyone know the hardware programming method of the mp3 player
> chip, my bootloader is not working and i dont have access to a device
> programmer

The boot loader can only be reprogrammed with a parallel programmer,
according to the spec.  We are in the process of building one for an
avr, not sure if it is the same for 89C51.  We just need to implement a
chip erase mode to bring back Jtag on the avr.

hi arvind ,
  plz let me know where did u get the AT89c51SND1c board,??as i'm
frustrated searching that in india.

ashis,
umashis_8086@yahoo.co.in

linnix wrote:
> aravind wrote:
> > Does anyone know the hardware programming method of the mp3 player
> > chip, my bootloader is not working and i dont have access to a device
> > programmer
>
> The boot loader can only be reprogrammed with a parallel programmer,
> according to the spec.  We are in the process of building one for an
> avr, not sure if it is the same for 89C51.  We just need to implement a
> chip erase mode to bring back Jtag on the avr.

Hi,

I bourght a couple of the chips earlier and never got to use them. I
think I have 5 chips left in the box. Let me know if you're interested.
(It's only the chips - not a demo board...)

/RaceMouse

ashis wrote:
> hi arvind ,
>   plz let me know where did u get the AT89c51SND1c board,??as i'm
> frustrated searching that in india.
> 
> ashis,
> umashis_8086@yahoo.co.in
> 
> linnix wrote:
> 
>>aravind wrote:
>>
>>>Does anyone know the hardware programming method of the mp3 player
>>>chip, my bootloader is not working and i dont have access to a device
>>>programmer
>>
>>The boot loader can only be reprogrammed with a parallel programmer,
>>according to the spec.  We are in the process of building one for an
>>avr, not sure if it is the same for 89C51.  We just need to implement a
>>chip erase mode to bring back Jtag on the avr.
> 
> 

ashis wrote:
> 
> hi arvind ,
>   plz let me know where did u get the AT89c51SND1c board,??as i'm
> frustrated searching that in india.

Mistakes here: 1. top-posting;  2. u and plz are not words; 3. ,??
is not valid punctuation; 4. I should always be capitalized.  5. 
India should be capitalized, as it is a proper name.

Paying attention to proper spelling and punctuation makes things
much easier for the reader.  Why offend someone you are asking to
help you through pure carelessness?

-- 
"The power of the Executive to cast a man into prison without
 formulating any charge known to the law, and particularly to
 deny him the judgement of his peers, is in the highest degree
 odious and is the foundation of all totalitarian government
 whether Nazi or Communist." -- W. Churchill, Nov 21, 1943

CBFalconer wrote:

I am so glad CBFalconer is here to keep us in line.

Thank You



> ashis wrote:
> 
>>hi arvind ,
>>  plz let me know where did u get the AT89c51SND1c board,??as i'm
>>frustrated searching that in india.
> 
> 
> Mistakes here: 1. top-posting;  2. u and plz are not words; 3. ,??
> is not valid punctuation; 4. I should always be capitalized.  5. 
> India should be capitalized, as it is a proper name.
> 
> Paying attention to proper spelling and punctuation makes things
> much easier for the reader.  Why offend someone you are asking to
> help you through pure carelessness?
> 

ashis <umashis_8086@yahoo.co.in> wrote:

> hi arvind ,
>   plz let me know where did u get the AT89c51SND1c board,??as i'm
> frustrated searching that in india.
> 
I have a SND1 Demob V2.2 left from an abandoned project.

The TDA1548 is brocken, so there is no real audio output.
I have a chip from TI which would match with some work.

Please send a mail if you are interested.

Greetings Klaus

linnix wrote:
> aravind wrote:
> > Does anyone know the hardware programming method of the mp3 player
> > chip, my bootloader is not working and i dont have access to a device
> > programmer
>
> The boot loader can only be reprogrammed with a parallel programmer,
> according to the spec.  We are in the process of building one for an
> avr, not sure if it is the same for 89C51.  We just need to implement a
> chip erase mode to bring back Jtag on the avr.

I have already built a programmer for 89C51 chip. if i just know the
programming connections for AT89C51SND1C chip such as the address,data
and control pins i can easily program it.

ashis wrote:
> hi arvind ,
>   plz let me know where did u get the AT89c51SND1c board,??as i'm
> frustrated searching that in india.
>
> ashis,
> umashis_8086@yahoo.co.in

    I had received a sample from a distributor in bangalore the
designed my own dev board with just the power supply,reset and clock
circuitry and a TQFP80 adapter

aravind wrote:
> linnix wrote:
> > aravind wrote:
> > > Does anyone know the hardware programming method of the mp3 player
> > > chip, my bootloader is not working and i dont have access to a device
> > > programmer
> >
> > The boot loader can only be reprogrammed with a parallel programmer,
> > according to the spec.  We are in the process of building one for an
> > avr, not sure if it is the same for 89C51.  We just need to implement a
> > chip erase mode to bring back Jtag on the avr.
>
> I have already built a programmer for 89C51 chip. if i just know the
> programming connections for AT89C51SND1C chip such as the address,data
> and control pins i can easily program it.

They are very similar, except that for the SND1C, P0 is multiplexed
Address and Data.  All you need are A15:8, AD7:0, ALE, RD, WR and ISP.
You should be able to modify your existing programmer for it.