nl_tokens: shutdown puts it into power saving sleep mode . call with false to wake it up .
pl_tokens: <mask> shutdown ( addr , b ) { if ( addr < 0 || addr >= maxDevices ) throw 'address out of range' ; if ( b ) spiTransfer ( addr , OP_SHUTDOWN , 0 ) ; else spiTransfer ( addr , OP_SHUTDOWN , 1 ) ; }