Expansion system for portable electronic devices
An expansion system for portable electronic devices is provided. A portable electronic device includes: a main logic board; an expansion device for expanding functionality of the portable electronic device; a flexible interconnection for logically connecting the expansion device to the main logic board; and a package for enclosing the main logic board and the expansion device together. The main logic board is mechanically isolated from the expansion device. The expansion device is physically spaced from the main logic board when enclosed in the package. An intrinsic expansion for a portable electronic device includes: an expansion board for expanding functionality of the portable electronic device, an expansion interface for logically connecting the expansion board to a main logic board of the portable electronic device, and a flexible interconnection for interconnecting the expansion board and the expansion interface. The expansion device is mounted in the portable electric device so as to be physically spaced from the main logic board when assembled.
1. A portable electronic device, comprising:
a package including a first cover and a second cover, for enclosing components of the portable electronic device in the inside of the package, the components of the portable electronic device including a main logic board and an expansion device expanding functionality of the portable electronic device, the package being sealed to prevent ingress of material from the surrounding environment into the inside of the package;
a mounting interface extending from the first cover toward the inside of the package, for mounting the expansion device in the inside of the sealed package such that the expansion device is physically spaced from the main logic board and mechanically disconnected from the main logic board; and
an expansion interface mounted on the main logic board, for logical communications between the expansion device and the main logic board.
2. A portable electronic device as defined in claim 1 , further comprising:
a flexible interconnection between the expansion device and the expansion interface for logically connecting the expansion device to the main logic board.
3. A portable electronic device as defined in claim 1 , wherein the expansion interface comprises:
a connector implementing standard communications protocol.
4. A portable electronic device as claimed in claim 3 , wherein system power from the connector is directly provided to the expansion device.
5. A portable electronic device as defined in claim 1 , wherein the package is sealed by
a rubber gasket.
6. A portable electronic device as claimed in claim 1 , wherein a Field Programmable Gate Array (FPGA) is mounted on the main logic board.
7. A portable electronic device as claimed in claim 1 , wherein the FPGA provides at least one of:
buffering and multiplexing Compact Flash (CF) signals to a main CPU of the portable electronic device;
direct address allocation of Serial Peripheral Interface (SPI) for synchronous serial data link to the CPU of the portable electronic device;
multiplexing interface for multi-imaging devices;
identification ID, to allow enable/disabling of signals and power; and
I2C connectivity.
8. A portable electronic device as claimed in claim 1 , wherein the expansion interface includes at least one of:
interface to a FPGA on the main logic board;
interface to a USB hub in the portable electronic device; and
interface to direct battery power.
9. A portable electronic device, comprising:
a package including a first cover and a second cover, for enclosing components of the portable electronic device in the inside of the package, the components of the portable electronic device including a main logic board and an expansion device, the package being sealed to prevent ingress of material from the surrounding environment into the inside of the package;
a flexible interconnection for logically interconnecting the expansion device to the main logic board to expand functionality of the portable electronic device; and
a mounting interface extending from the first cover toward the inside of the package, for mounting the expansion device in the inside of the sealed package such that the expansion device is physically spaced from the main logic board and mechanically disconnected from the main logic board.
10. A portable electronic device as defined in claim 9 , wherein:
the package is sealed by a rubber gasket.
11. A portable electronic device as defined in claim 9 , comprising:
an expansion interface mounted on the main logic board, for logical communications between the expansion device and the main logic board.
12. A portable electronic device as defined in claim 11 , wherein the expansion interface comprises:
a connector with standard communications protocol.
13. A portable electronic device as claimed in claim 12 , wherein system power from the connector is directly provided to the expansion device.
14. A portable electronic device as claimed in claim 11 , wherein the expansion interface includes at least one of:
interface to a FPGA on the main logic board;
interface to a USB hub in the portable electronic device; and
interface to direct battery power.
15. A portable electronic device as claimed in claim 14 , wherein the FPGA provides at least one of:
buffering and multiplexing Compact Flash (CF) signals to a main CPU of the portable electronic device;
direct address allocation of Serial Peripheral Interface (SPI) for synchronous serial data link to the CPU of the portable electronic device;
multiplexing interface for multi-imaging devices;
identification ID to allow enable/disabling of signals and power; and
I2C connectivity.