[time-nuts] PICTIC II ready-made?

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There was also the short lived XPLA2 PZ/XCR3320,3960 (Ph/X) SRAM CPLD 
family, which had to be configured from an external memory... just 
another exception which confirms the rule.
ftp://ftp.xilinx.com/pub/coolpld/isp/960_conf.pdf

The even older intel FLEXlogic, bought by Altera, and rebranded 
FLASHlogic, with the odd CFB/SRAM architecture, had also internal 
SRAM/Flash configuration memory.

In XAPP440 the power-up configuration transfer of Xilinx CPLDs is very 
briefly mentioned, and in XAPP388 more details for CR-II are provided.
Such often "overlooked" details cold be sometimes crucial...


On 4/28/2012 11:46 PM, Bruce Griffiths wrote:
> Yes, I should have been more specific.
> The details about the state machine clock behaviour aren't on the
> datasheet and were obtained by asking Xilinx.
> The reason for using CMOS RAM to controll the CPLD interconnections is
> to reduce the static power consumption well below that possible when
> using EEPROM cells directly.
> As long as the state machine clock is turned off during normal operation
> then it will not be a source of timing jitter.
>
> I had intended the post as a warning that chip implementation details
> not necessarily given on the datasheet can be critical for such
> applications.
>
> Bruce
>
> MailLists wrote:
>> I guess you wanted to refer to the old XPLA PZ3k/5k CoolRunner series
>> bought from Philips, renamed XCR3k/5k, and later enhanced to
>> XPLA3/XCR3kXL, not the "antique" FPGA family XC3k...
>> (C)PLDs don't need an external memory for configuration storing, it's
>> internal.
>> There are also some Lattice, ACTEL, and even Xilinx FPGAs with
>> internal "non-volatile" configuration memory.
>>
>> On 4/28/2012 3:12 PM, Azelio Boriani wrote:
>>>>> configuration is loaded from EEPROM to RAM on power up<<
>>> For every kind of logic? Even for the simplest XC3000 series (and the
>>> Altera equivalent EPM3000 series) small EEPROM CPLD?
>>>
>>> On Sat, Apr 28, 2012 at 9:04 AM, cfo<xnews3 at luna.dyndns.dk> wrote:
>>>
>>>> On Fri, 27 Apr 2012 12:03:20 -0700, Jerry Mulchin wrote:
>>>>
>>>>> You might want to take a look at the Atmel XMEGA parts. Far more
>>>>> capabilities than the ATMega parts.
>>>>>
>>>> Watch out .....
>>>>
>>>> If using an Xmega make sure to select the "U" ... Usb ones.
>>>> Most of the non U parts have an errata list longer than the datasheet ,
>>>> and in the analog domain they have serious flaws.
>>>>
>>>> But going there (smd only) i'd select an arm instead.
>>>>
>>>> CFO
>>>>
>>>>
>>>>
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