Semiconductor memory device having memory block configuration
View Patent ↗A memory array including memory mats is arranged in a U shape when seen in two dimensions, and a logic circuit and an analog circuit are arranged in a region unoccupied by the memory array. This facilitates transmission of power supply voltage and signals between the peripheral circuit including the analog and logic circuits and the pad band including power supply and data pads. The analog circuit is positioned close to the power supply pad, so that voltage drop due to the resistance of power supply interconnection is restricted. It is also possible to separate a charge pumping power supply interconnection and a peripheral circuit power supply interconnection in the vicinity of the power supply pad.
1. A semiconductor memory device, comprising:
a memory array arranged in a U-shaped area in plane view;
an analog circuit and a logic circuit arranged in a hollow portion formed by the arrangement of said memory array;
a pad arranged in contact with said hollow portion so that a signal or power is provided directly to said analog circuit and said logic circuit, wherein
said memory array is non-volatile, and has a plurality of banks,
at least one of said plurality of banks includes
a first region having normal block regions and a spare block region arranged in rows and columns, each normal block region being as a unit of batch erase, and said spare block region substituting said normal block region when said normal block region is defective, and
a second region having a boot block region that is a unit of batch erase smaller than said normal block region.
2. The semiconductor memory device according to claim 1 , wherein
said memory array includes a plurality of banks, each having a normal block and a spare block,
each of said banks has a plurality of bit lines, and
said normal block and said spare block in said bank share a column decoder that selects said bit lines and a sense amplifier circuit that senses and amplifies potentials of said bit lines.
3. The semiconductor memory device according to claim 1 , wherein
said U-shaped area includes first and second portions extending in parallel in a first direction, and a bottom portion extending in a second direction and being disposed between said first and second portions, the first, second and bottom portions being arranged in a U-shape,
said memory array is non-volatile,
said first and second portions each include two banks of said memory array,
each of said banks has a plurality of bit lines, and
said banks in each of said first and second portions share a sense amplifier circuit that senses and amplifies potentials of said bit lines.
4. The semiconductor memory device according to claim 1 , wherein said first region is rectangular and blocks therein are squarely arranged in rows and columns.