Back to results
US 6,295,408 B1Granted
Flexible DSP interface circuit
AssigneeOak Technology, Inc.
InventorJames N. Maertens
Life of this patent
Estimating the term…
Abstract
An interface circuit that facilitates communication between a DSP and decoder in a disc system or other application. The interface circuit is programmable so multiple communication interfaces can be supported without requiring additional specialized logic uniquely tailored for each particular communication interface. Sector and countdown-type data transfers are supported by the interface circuit.
Claims23
A DSP interface circuit comprising:
- a data input for receiving data;
- a first control input for receiving a first control signal operable to control reception of said data;
- and
- a first polarity select coupled to said first control input, said polarity select being programmable to change state of said first control signal from active high to active low.
1 more element
An optical disc system comprising:
- a DSP that processes and outputs data retrieved from an optical disc;
- a DSP interface circuit coupled to said DSP, said DSP interface circuit having a data input for receiving said data and a plurality of control inputs for receiving a plurality of control signals operable to control reception of said data;
- and
- a plurality of polarity selects coupled to said plurality of control inputs, said polarity selects being programmable to change state of each of said plurality of control signals from active high to active low or from rising edge to falling edge.
1 more element
A DVD system comprising:
- a DVD DSP that generates data signals and a plurality of control signals;
- and
- an audio/video decoder, coupled to said DVD DSP, that generates audio and video signals, said decoder including a DVD-DSP interface circuit, said interface circuit including:
- a data input for receiving said data signals;
- a plurality of control signal inputs operable to receive said plurality of control signals to control reception of said data signals;
- and
- a plurality of polarity selects coupled to said plurality of control signal inputs, said polarity selects being programmable to change state of each of said plurality of control signals from active high to active low or from rising edge to falling edge.
4 more elements
A DSP interface circuit comprising:
- a data input for receiving data;
- a first control input for receiving a first control signal operable to control reception of said data;
- a first polarity select coupled to said first control input, said polarity select being programmable to change state of said first control signal;
- a second control input for receiving a second control signal operable to control reception of said data;
- a second polarity select coupled to said second control input, said polarity select being programmable to change state of said second control signal;
- a flip flop coupled to said first control input said flip flop limiting reception of said data to a single sector of data at a time;
- and
- a negative counter coupled to said second control input, said negative counter limiting periodic reception of said data to a programmable quantity.
5 more elements
An optical disc system comprising:
- a DSP that processes and outputs data retrieved from an optical disc;
- a DSP interface circuit coupled to said DSP, said DSP interface circuit having a data input for receiving said data and a plurality of control inputs for receiving a plurality of control signals operable to control reception of said data;
- a plurality of polarity selects coupled to said plurality of control inputs, said polarity selects being programmable to change state of each of said plurality of control signals;
- a flip flop coupled to a first control input of said plurality of control inputs, said flip flop limiting reception of said data to a single sector of data at a time;
- and
- a negative counter coupled to a second control input of said plurality of control inputs, said negative counter limiting periodic reception of said data to a programmable quantity.
3 more elements
A DVD system comprising:
- a DVD DSP that generates data signals and a plurality of control signals;
- an audio/video decoder, coupled to said DVD DSP, that generates audio and video signals, said decoder including a DVD-DSP interface circuit, said interface circuit including:
- a data input for receiving said data signals;
- a plurality of control signal inputs operable to receive said plurality of control signals to control reception of said data signals;
- a plurality of polarity selects coupled to said plurality of control signal inputs, said polarity selects being programmable to change state of each of said plurality of control signals;
- a first programming register coupled to said plurality of polarity selects, said programming register holding programming bits for programming said plurality of polarity selects;
- first logic means, coupled to a first subset of said plurality of control signal inputs, for facilitating synchronous and asynchronous operation;
- and
- a second programming register, coupled to said first logic means, for selecting synchronous or asynchronous operation.
6 more elements
Dependencies are inferred from the claim text.