ISP interface

Hi,

I'm looking for some information on the proprietary ISP interface used
by Lattice (specifically in the ispGDS22 device)

I've managed to find a Lattice document describing the function of the
SDI,SDO,MODE + SCLK pins and the devices internal state machine, but
nothing on specifically how to get the fuse map /JEDEC file into the
device 'in-situ'. I've searched the Lattice website, but they don't
seem to give out this information readily.

Can anyone direct me to a suitable resource?

Many thanks

David

David schrieb:

> Hi,
>
> I'm looking for some information on the proprietary ISP interface used
> by Lattice (specifically in the ispGDS22 device)
>
> I've managed to find a Lattice document describing the function of the
> SDI,SDO,MODE + SCLK pins and the devices internal state machine, but
> nothing on specifically how to get the fuse map /JEDEC file into the
> device 'in-situ'. I've searched the Lattice website, but they don't
> seem to give out this information readily.
>
> Can anyone direct me to a suitable resource?
>
> Many thanks
>
> David

lattice ISP sw source code used to be available
but I think it no longer is :(

Antti wrote:
> David schrieb:
> 
>> Hi,
>>
>> I'm looking for some information on the proprietary ISP interface used
>> by Lattice (specifically in the ispGDS22 device)
>>
>> I've managed to find a Lattice document describing the function of the
>> SDI,SDO,MODE + SCLK pins and the devices internal state machine, but
>> nothing on specifically how to get the fuse map /JEDEC file into the
>> device 'in-situ'. I've searched the Lattice website, but they don't
>> seem to give out this information readily.
>>
>> Can anyone direct me to a suitable resource?
>>
>> Many thanks
>>
>> David
> 
> lattice ISP sw source code used to be available
> but I think it no longer is :(
> 

Hmmm... that may make me think twice about using Lattice devices; ISP is 
a key requirement.

Cheers

PeteS

PeteS schrieb:

> Antti wrote:
> > David schrieb:
> >
> >> Hi,
> >>
> >> I'm looking for some information on the proprietary ISP interface used
> >> by Lattice (specifically in the ispGDS22 device)
> >>
> >> I've managed to find a Lattice document describing the function of the
> >> SDI,SDO,MODE + SCLK pins and the devices internal state machine, but
> >> nothing on specifically how to get the fuse map /JEDEC file into the
> >> device 'in-situ'. I've searched the Lattice website, but they don't
> >> seem to give out this information readily.
> >>
> >> Can anyone direct me to a suitable resource?
> >>
> >> Many thanks
> >>
> >> David
> >
> > lattice ISP sw source code used to be available
> > but I think it no longer is :(
> >
>
> Hmmm... that may make me think twice about using Lattice devices; ISP is
> a key requirement.
>
> Cheers
>
> PeteS

there should be no problems with recent devices,
I was referring to ISP source code for devices like ispGAL, etc..
I had it once, but I think this was still the "floppy disk era" so
not sure if I still have to code

for new devices the embedded programming is obtainable

Antti

Antti wrote:
> PeteS schrieb:
> 
>> Antti wrote:
>>> David schrieb:
>>>
>>>> Hi,
>>>>
>>>> I'm looking for some information on the proprietary ISP interface used
>>>> by Lattice (specifically in the ispGDS22 device)
>>>>
>>>> I've managed to find a Lattice document describing the function of the
>>>> SDI,SDO,MODE + SCLK pins and the devices internal state machine, but
>>>> nothing on specifically how to get the fuse map /JEDEC file into the
>>>> device 'in-situ'. I've searched the Lattice website, but they don't
>>>> seem to give out this information readily.
>>>>
>>>> Can anyone direct me to a suitable resource?
>>>>
>>>> Many thanks
>>>>
>>>> David
>>> lattice ISP sw source code used to be available
>>> but I think it no longer is :(
>>>
>> Hmmm... that may make me think twice about using Lattice devices; ISP is
>> a key requirement.
>>
>> Cheers
>>
>> PeteS
> 
> there should be no problems with recent devices,
> I was referring to ISP source code for devices like ispGAL, etc..
> I had it once, but I think this was still the "floppy disk era" so
> not sure if I still have to code
> 
> for new devices the embedded programming is obtainable
> 
> Antti
> 

Thanks for that clarification, Antti :)

Cheers

PeteS