Multi-level cell access buffer with dual function
First Claim
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1. A dual-mode circuit comprising:
- a latch circuit having a first input and a second input, the latch circuit comprising a driving inverter having the second input;
the dual-mode circuit having a first mode of operation in which a first signal received at the first input is latched by the latch circuit;
the dual-mode circuit having a second mode of operation in which a second signal received at the second input is inverted by the driving inverter.
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Abstract
An access buffer, such as page buffer, for writing to non-volatile memory, such as Flash, using a two-stage MLC (multi-level cell) operation is provided. The access buffer has a first latch for temporarily storing the data to be written. A second latch is provided for reading data from the memory as part of the two-stage write operation. The second latch has an inverter that participates in the latching function when reading from the memory. The same inverter is used to produce a complement of an input signal being written to the first latch with the result that a double ended input is used to write to the first latch.
58 Citations
16 Claims
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1. A dual-mode circuit comprising:
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a latch circuit having a first input and a second input, the latch circuit comprising a driving inverter having the second input; the dual-mode circuit having a first mode of operation in which a first signal received at the first input is latched by the latch circuit; the dual-mode circuit having a second mode of operation in which a second signal received at the second input is inverted by the driving inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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in a first mode of operation, latching a first signal received at a first input of a latch circuit to the latch circuit; in a second mode of operation, inverting a second signal received at a second input using a driving inverter that forms part of the latch circuit; operating in the first mode of operation some of the time, and operating in the second mode of operation some of the time. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification