the DS2413 two-GPIO controller is the 1-wire-addressable switch used in the MacBook #power-supply plug #hardware. You can put as many as you want on a single I/O line and read and write them, up to 28V and 20mA per pin.
on 02015-11-25Woz talks about the #Apple ][ #power-supply #hardware.
on 02015-11-25Ken #Shirriff dissects the #electronics #hardware of a MacBook #power-supply. He finds a 16MHz 4.6MIPS #MSP430 (MSP430F2003) inside! And a 1-wire chip inside the plug to tell the Mac the serial number of the charger!
on 02015-11-25