Electronic device with power mode control buffers

An electronic device, comprising:

• a plurality of functional blocks;
• a power control module for causing selected functional blocks to operate in a low power mode with power supply reduced or cut-off and subsequently to be restored to a full power mode of operation, while leaving other functional blocks supplied continuously with power;
• and
• a power mode control distribution network including a plurality of serially connected chains of inverters for distributing power mode control signals received at a common input end to respective output ends that are connected to respective ones of the plurality of functional blocks;
• wherein in said low power mode said power control module causes power to be supplied continuously to at least one continuously powered output portion inverter of respective output portions at said output ends of said chains while causing power supplied to other inverters closer to said input end of said chains to be reduced or cut-off, and
• wherein said output portions include feedback paths for causing the states of said output portion inverters prior to said low power mode to latch during said low power mode.