Non-volatile memory device having high speed serial interface
View Patent ↗A non-volatile memory device comprises an interface circuit for receiving a plurality of signals. The plurality of signals provides multiplexed address and data and command signals in a serial format. An input buffer stores a plurality of the plurality of signals received in serial format and reconstitutes the address, data and command signals, and has an output. A command circuit receives the output of the input buffer and stores the command signals therefrom. An address circuit receives the output of the input buffer and stores the address signals therefrom. A data buffer circuit receives the output of the input buffer and stores the data signals therefrom. An array of non-volatile memory cells stores data from and provides data to the data buffer in response to address signals from the address decoder. A state machine is connected to the command circuit and controls the array of non-volatile memory cells. An output buffer receives data from the data buffer circuit and provides data to the interface circuit.
1. A non-volatile memory device comprising:
an interface circuit for receiving a plurality of signals, substantially simultaneously, wherein said plurality of signals for providing multiplexed address and data and command signals in a serial format;
an input buffer for storing a plurality of said plurality of signals received in serial format and for reconstituting said address, data and command signals, and having an output;
a command circuit for receiving the output of said input buffer for storing the command signals therefrom;
an address circuit for receiving the output of said input buffer for storing the address signals therefrom;
a data buffer circuit for receiving the output of said input buffer for storing the data signals therefrom;
an array of non-volatile memory cells, said array for storing data from and for providing data to the data buffer circuit in response to address signals from the address circuit;
a state machine connected to the command circuit for controlling said array of non-volatile memory cells; and
an output buffer for receiving data from the data buffer circuit and for providing data to the interface circuit.
2. The device of claim 1 wherein said serial interface circuit further receives a clock signal;
wherein said device further comprises:
a clock counter for receiving the clock signals; and
wherein said state machine for receiving the output of the clock counter.
3. The device of claim 1 wherein said device further comprising
a control circuit for controlling the programming and erasing of said array of non-volatile memory cells and wherein the state machine for controlling the control circuit.
4. The device of claim 1 wherein said command circuit for enabling an execute in place operation.
5. The device of claim 4 wherein said address circuit further includes means for burst reading with zero latency wrap.
6. The device of claim 4 wherein said address circuit further includes means for continuous reading with zero latency end of word line to the next word line.
7. The device of claim 4 wherein said address circuit further includes means for continuous indexed reading from the array of non-volatile memory cells.
8. The device of claim 7 wherein the means for indexed reading comprises two's complement indirect addressing.
9. The device of claim 8 wherein said means for indexed reading includes reading between a first block and a second block of data.
10. The device of claim 8 wherein said means for indexed reading includes reading within a block of data.
11. The device of claim 4 wherein said address circuit further includes means for performing an end of read cycle address capture for push/pop return to the initial address.