Circuit apparatus with extending general purpose input output pin
OwnerKuan-Yu Lee, Chen-Ho Leeinventors
Life of this patent
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Abstract
A circuit apparatus of extending General Purpose Input Output pins, which includes a control processing unit, a memory, and a buffer. Wherein, data pins of the control processing unit is coupled to memory pins of the memory and those in the buffer. Input signals can be temporarily stored in the buffer when the buffer is used as a buffer for inputting signals. And the buffer can feed input signals into the control processing unit while the memory is being recharged. Likewise, if the buffer is used as a buffer for outputting signals, the buffer can receive output signals (So) from the control processing unit and output those signals while the memory is being refreshed.
Claims26
An apparatus comprising:
- a scanner memory, having a plurality of memory pins;
- a control processing unit having a plurality of data pins, wherein at least one of the plurality of data pins is coupled to at least one of the plurality of memory pins;
- and
- a buffer, coupled to at least one of the plurality of data pins, wherein the buffer is adapted to provide data signals to the at least one of the plurality of data pins according to a control signal synchronized with a recharging signal provided to the scanner memory.
An apparatus comprising:
- a scanner memory, having a plurality of memory pins;
- a control processing unit having a plurality of data pins, wherein at least one of the plurality of data pins is coupled to at least one of the plurality of memory pins;
- and
- a buffer, coupled to one or more of the plurality of data pins, wherein the buffer is adapted to receive an output signal provided from one or more of the plurality of data pins, wherein the buffer outputs the output signal according to a control signal synchronized with a recharging signal provided to the scanner memory.
A scanner, comprising:
- a bus;
- a buffer communicatively coupled to the bus,
- a memory-communicatively coupled to the bus, wherein the memory is adapted to receive a recharge signal;
- and
- a control processing unit communicatively coupled to the bus, wherein the control processing unit is adapted to generate a control signal responsive to the recharge signal provided to the memory, to enable data transfer between the buffer and the control processing unit, wherein the data transfer is synchronized with the recharge signal provided to the memory.
A method of accessing a control processing unit of a scanning device, comprising:
- providing an input signal to a buffer of the scanning device;
- determining whether a recharge signal is being provided to a memory of the scanning device;
- and
- enabling data transfer of at least a portion of the input signal between the buffer and the control processing unit, wherein the data transfer is synchronized with the recharge signal provided to the memory.
Dependencies are inferred from the claim text.