> Hi Dan -
> this is actually a 2-parter -
> LatticeXP devices have DCS blocks(Dynamic Clock Selection) as part
> of the global clock networks, and can be used to deactivate selected
> clocks, reducing current for that clock domain.
> LatticeXP, and MachXO, both also offer 'Sleep Mode', in that these
> devices have built-in Flash memory, for boot-up. The SleepMode pin
> deactivates the core power supply, and maintains voltage in the I/O,
> which allows for very low power ( less than 100ua) standby current.
> When exiting 'sleep mode' the core supply is re-activated, and the
> device then auto-boots from flash on chip.
>
> The marketing term is "INSTANT ON" but us FAEs prefer "less than 1
> millisecond".
>
> So, yes, you can disable clocks to save some power, while the device
> remains active, or you can enter 'sleep mode' and save most of the
> power. Sleep Mode is available on the 'C' version of each device in
> the family. The 'C' version has an onboard regulator, so you can run
> the device with a single 3.3v supply. The core operates at 1.2v,
> (derived from the on chip regulator in the 'C' devices), we require
> 3.3v for VccAUX(used for thresholding and some housekeeping circuitry),
> and the appropriate VccIO voltages.
>
> thanks for aking -
>
> Michael Thomas
> Lattice SFAE - NY/NJ
>

Thanks,

I'll explore these features.



Dan.