Patent ID: 9715467
Date: 2017-07-25
CPC Classifications: G06F,Y02D

Claim:
1. A method comprising: receiving commands and an external voltage reference on a command and address (CA) bus at a slave device while the CA bus is in a high-swing mode, wherein the slave device comprises dual-mode input-output (I/O) support to operate the CA bus in a low-swing mode and the high-swing mode, wherein the CA bus utilizes a first voltage reference in the high-swing mode; initiating calibration of a second voltage reference of the slave device to operate the CA bus in the low-swing mode in response to the received commands, wherein the second voltage reference is based on the external voltage reference and the second voltage reference is lower in voltage than the first voltage reference; switching the slave device to operate the CA bus in the low-swing mode while the CA bus remains active; and receiving additional commands on the CA bus at the slave device while the CA bus is in the low-swing mode.