US 12,298,927 B2
Selectable input buffers of general purpose inputs and microcontrollers having the same
Richard L. Hull, Puyallup, WA (US); and Voltaire Ganchorre, Puyallup, WA (US)
Assigned to Microchip Technology Incorporated, Chandler, AZ (US)
Filed by Microchip Technology Incorporated, Chandler, AZ (US)
Filed on Jun. 24, 2020, as Appl. No. 16/946,500.
Claims priority of provisional application 62/867,553, filed on Jun. 27, 2019.
Prior Publication US 2020/0409879 A1, Dec. 31, 2020
Int. Cl. G06F 13/20 (2006.01)
CPC G06F 13/20 (2013.01) [G06F 2213/40 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A general purpose input of a microcontroller, the general purpose input comprising:
an input pin pad for operative coupling to a device external to a microcontroller;
a supply pin pad for operative coupling to a voltage supply to continuously power the general purpose input during multiple power states of the microcontroller; and
a circuitry to selectively disable static current draw at the general purpose input via enablement/disablement of two or more input buffers of the general purpose input, wherein the circuitry to selectively disable static current draw at least partially responsive to an input voltage at the input pin pad being lower than a supply voltage at the supply pin pad.