Configurable input/output driver circuitry for controller and nand communication in a data storage device

A method in a storage device for establishing a connection with a receiver in a memory device that is booted up in a Center Tapped Termination (CTT) mode, the storage device comprises a controller to execute the method including:

• booting up the storage device in a Low Tapped Termination (LTT) mode;
• enabling a configurable PMOS pull-up in a LTT input/output (IO) driver to pull up an output high voltage (VOH);
• sending a pulled-up signal to the memory device on a CTT reference;
• directing the memory device to switch to a LTT mode;
• switching to the LTT mode and disabling the PMOS pull-up;
• and
• communicating with the memory device in the LTT mode.

A storage device to establish a connection with a receiver in a memory device that is booted up in a Center Tapped Termination (CTT) mode, the storage device comprises:

• an access point for connecting the storage device with a toggle mode (TM) link to communicatively couple the storage device to the memory device;
• a Low Tapped Termination (LTT) input/output (IO) driver including a stack of NMOS, a configurable PMOS to pull up an output high voltage (VOH) with a resistor, and an unterminated channel;
• and
• a controller to enable the PMOS high-resistance pull-up resistor to cause the controller to operate in the CTT mode and communicate with the memory device booted in the CTT mode when the storage device is booted in the LTT mode, to cause the memory device to switch to the LTT mode and to communicate with the memory device in the LTT mode.