Information handling system multi-purpose connector guide pin structure

1. An information handling system comprising:

a housing;

a processor disposed in the housing and operable to execute instructions that process information;

memory disposed in the housing and interfaced with the processor, the memory operable to store the instructions and information;

a power manager disposed in the housing and operable to manage power applied to the processor and memory;

a communications controller interfaced with the processor and the power manager, the communications controller operable to manage an interface with an external device to communicate power and data with the external device;

a connector port disposed at the housing and interfaced with the communications controller, the connector port having data and power pins to interface data and power with the external device through a connector cable;

a power negotiator interfaced with the communications controller and operable to negotiate power settings for power transfer to and from the external device and to store the power settings for application by the communications controller;

a docking station coupled with the connector port as the external device;

one or more peripherals coupled to the docking station and interfaced with the connector port through the docking station;

wherein the communications controller selectively receives power from the docking station and provides power to the docking station with the power settings, the power provided to the docking station used at the docking station to power the one or more peripherals;

a charge controller disposed in the housing and operable to provide power from an external source for use by the power manager;

a battery disposed in the housing and operable to provide power for use by the power manager, the battery interfaced with the charge controller to accept a charge when the charge controller interfaces with an external source;

a first power direction switch disposed between the port and the charge controller and interfaced with the power manager;

a second power direction switch disposed between the port and the battery and interfaced with the power manager;

wherein the power manager turns off the first power direction switch and on the second power direction switch to change the direction of power between the external device and information handling system.

2. The information handling system of claim 1 wherein the communications controller is further operable to apply the power settings to change the direction of power communication without a reset.

3. The information handling system of claim 2 wherein the communications controller comprises a Universal Serial Bus controller.

4. The information handling system of claim 1 further comprising first and second connector ports disposed at the housing, each connector port having data and power pins to interface data and power with first and second external devices through a connector cable coupled to each connector port, wherein:

the power negotiator is further operable to negotiate power settings for power transfer to and from first and second external devices and to store the power settings for application by the communications controller; and

the communications controller is further operable to apply the power settings to establish power transfer with the second external device if power transfer is interrupted with the first external device.

5. The information handling system of claim 1 further comprising:

at least one guide connector proximate the connector port and operable to accept power from a guide pin;

wherein the power negotiator is further operable to negotiate power settings for power transfer to and from the external device through the guide connector and to store the power settings for application by the communication controller; and

wherein the communications controller is further operable to apply the power settings to establish power transfer to and from the external device with the guide connector if power transfer through the connector port is interrupted.

6. The information handling system of claim 1 wherein the first and second power direction switches comprise field effect transistors managed by a gate control circuit.

7. The system of claim 1 wherein the power manager is further operable to detect a disconnection of the external device from the port and, in response to delete the power settings.

8. A method for transferring power between an information handling system and external device through a communications port, the method comprising:

detecting insertion of a connector into the communications port of the information handling system, the connector interfaced with the external device;

exchanging power capabilities between the information handling system and external device through the communications port;

negotiating first power transfer settings for power transfer from the external device to the information handling system through the communications port;

pre-negotiating second power transfer settings for power transfer from the information handling system to the external device through the communications port;

storing the pre-negotiated second power transfer settings; and

initiating power transfer from the external device to the information handling system with the first power settings;

detecting a predetermined condition; and

in response to the predetermined condition, applying the stored pre-negotiated second power transfer settings to initiate power transfer from the information handling system to the external device,

wherein the predetermined condition comprises an interruption of power transfer from the external device to the information handling system.

9. The method of claim 8 further comprising powering peripherals interfaced with the external device with power provided from the information handling system.

10. The method of claim 9 wherein the communications port comprises a USB port.

11. The method of claim 8 further comprising:

detecting a disconnection of the connector from the communications port; and

in response to the detecting a disconnection, deleting the pre-negotiated second power transfer settings.

12. The method of claim 8 wherein power is initiated from the information handling system to the external device without a power transfer reset.

13. A system for transferring power between an information handling system and an external device through a communications port, the system comprising:

a communications port configured to integrate in the information handling system, the communications port having power pins for communicating power and data pins for communicating data;

a power negotiator interfaced with the communications port and operable upon detection of an external device connection to the communication port to negotiate first power transfer settings to transfer power from the external device to the information handling system and second power transfer settings to transfer power from the information handling system to the external device, the power negotiator saving the first and second power transfer settings;

a power manager interfaced with the power negotiator, the power manager operable to command power transfer to the information handling system with the first power transfer settings and to command power transfer from the information handling system with the second power transfer settings; and

first and second power direction switches interfaced with the power manager and operable to configure the information handling system to transition between receiving power and sending power when the power manager applies the first power transfer settings and the second power transfer settings.

14. The system of claim 13 wherein the power negotiator is further operable to delete the first and second power transfer settings upon detection of a disconnection of the external device from the communication port.

15. The system of claim 13 further comprising first and second communication ports, wherein the power negotiator is further operable to negotiate first and second power transfer settings for a first external device coupled to the first communications port and for a second external device coupled to the second communications port.

16. The system of claim 15 wherein the power manager is further operable to selectively command power transfers to and from the information handling system for the first and second external devices by applying the first and second power transfer settings for each external device without resetting power transfer between the information handling system and the first and second devices.