摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A single chip semiconductor integrated circuit device having a central processing unit (CPU) and a flash memory which stores data to be processed by the CPU and which provides data to the CPU through the data bus in response to accessing instructions from the CPU through the address bus. The flash memory is constituted by a plurality of memory blocks each of which has a plurality of electrically programmable nonvolatile memory cells arranged in rows and columns in which each nonvolatile memory cell is coupled to one of a plurality of word lines and one of a plurality of data lines of the flash memory. The memory blocks formed can be facilitated with different memory capacities, including through controlling the number of rows or columns of memory cells associated therewith. Sources of all of the memory cells within each memory block are connected to a single source line which is fed by a predetermined voltage from a corresponding one of plural source voltage control circuits, for flash erasing the memory cells in that memory block in an erasing operation. In accordance with another feature of the flash memory, a control register, included within a device and under the control of the CPU, is employed to control the erasing of data stored in one or more of the memory blocks, simultaneously.
摘要:
A single chip semiconductor integrated circuit device having a central processing unit (CPU) and a flash memory which stores data to be processed by the CPU and which provides data to the CPU through the data bus in response to accessing instructions from the CPU through the address bus. The flash memory is constituted by a plurality of memory arrays in which a plurality of word lines are commonly employed for all of the memory arrays and a plurality of data lines are distributed amongst the memory arrays. The nonvolatile memory cells are arranged in a manner in which plural memory blocks are formed. The memory blocks formed can be facilitated with different memory capacities. This is achieved by having one or more rows of memory cells associated with one or more word lines provided within a memory block. Sources of all of the memory cells within each memory block are connected to a single source line which is fed by a predetermined voltage for effecting simultaneous erasure of the memory cells therein from a corresponding one of plural source voltage control circuits. In accordance with another feature of the flash memory, individual ones of plural bit data are assigned to respective ones of the plural memory arrays.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.