OMAP L138 PRU sleep

Hi,

From what I've read in other forum posts the PRU silicon version in the OMAP L138 is 1 which means the sleep instruction cannot be used. Does this mean that sleep in this version of the PRU is not supported even by directly writing to the 'SLEEPING' bit in the Control register (doesn't seem to work when I try it)?

If PRU sleep is not possible will halting it (HALT instruction or ENABLE bit in Control register) have any affect on power consumption?

Thanks

Nigel