Memory device and computing device using the same

A memory device comprising:

• a buffer memory configured to store weight data including first and second weight bits;
• an input/output pad configured to receive input data including first and second input bits;
• and
• a multiply-accumulate (MAC) operator including a first multiplier and first to third accumulators, the MAC operator configured to receive the weight data and the first and second input bits, and perform a convolution operation of the weight data and the input data,
• wherein performing the convolution operation of the weight data and the input data by the MAC operator comprises,
• providing the first input bit to the first multiplier,
• calculating a first product of the first weight bit and the first input bit using the first multiplier and providing the first product to the first accumulator,
• calculating a second product of the second weight bit and the first input bit using the first multiplier and providing the second product to the second accumulator,
• providing the second input bit to the first multiplier after calculating the first product and the second product,
• calculating a third product of the first weight bit and the second input bit using the first multiplier and providing the third product to the second accumulator,
• calculating a fourth product of the second weight bit and the second input bit using the first multiplier and providing the fourth product to the third accumulator, and
• generating a product of the weight data and the input data based on the first product, the second product, the third product, and the fourth product.

A memory device comprising:

• a memory cell configured to store weight data;
• a buffer memory configured to read the weight data from the memory cell;
• an input/output pad configured to receive input data;
• and
• a multiply-accumulate (MAC) operator configured to perform a convolution operation of the weight data and the input data,
• wherein the buffer memory reads the weight data from the memory cell before the input data is provided to the input/output pad,
• wherein the input data is provided to the MAC operator from the input/output pad during a first period,
• wherein the weight data includes first and second weight bits and is provided to the MAC operator from the buffer memory during a second period overlapping with the first period,
• wherein the MAC operator includes a first multiplier and first to third accumulators,
• wherein performing the convolution operation comprises performing, by the first multiplier, a multiplication operation on the weight data and a first input bit of the input data prior to providing a second input bit of the input data to the MAC operator, and
• wherein performing the multiplication operation of the weight data and the input data by the first multiplier comprises, by the first multiplier,
• calculating a first product of the first weight bit and the first input bit and providing the first product to the first accumulator,
• calculating a second product of the second weight bit and the first input bit and providing the second product to the second accumulator,
• calculating a third product of the first weight bit and the second input bit and providing the third product to the second accumulator, and
• calculating a fourth product of the second weight bit and the second input bit and providing the fourth product to the third accumulator.