Method and apparatus for address allotting and verification in a semiconductor device
View Patent ↗A semiconductor device includes a CAM cell array that stores the operation setting information as to the semiconductor device, a controller that controls read and write of the CAM cell array, a row decoder, and a column decoder. With this structure, different row addresses are allocated to respective functions of the operation setting information. Accordingly, stress is not caused in the CAM cell array of the unselected functions at the time of programming.
1. A semiconductor device comprising:
a cell array that stores operation setting information for the semiconductor device; and
a control unit that controls read and write operations to be performed on the cell array;
the control unit allocating different row addresses for respective functions of the operation setting information wherein the control unit allocates the operation setting information to column addresses selected by one of the row addresses.
2. The semiconductor device as claimed in claim 1 , wherein the control unit allocates different column addresses for the respective functions of the operation setting information.
3. The semiconductor device as claimed in claim 1 , wherein the control unit allocates continuous column addresses for the respective functions of the operation setting information.
4. The semiconductor device as claimed in claim 3 , wherein the control unit selects all word lines on the cell array, and reads the operation setting information data from the cell array while successively changing the column addresses.
5. The semiconductor device as claimed in claim 1 , wherein the control unit allocates the operation setting information to all I/Os of an arbitrary column selected by the row address.
6. The semiconductor device as claimed in claim 1 , wherein memory cells accessed by different row addresses are isolated from each other in terms of wiring pattern of local bit lines.
7. The semiconductor device as claimed in claim 1 , wherein memory cells are connected to switches for selectively connecting the memory cells to bit lines arranged on a corresponding column.
8. The semiconductor device as claimed in claim 1 , wherein, the cell array comprises cells for each column, and memory cells not storing the operation setting information are isolated from bit lines arranged on a corresponding column.
9. The semiconductor device as claimed in claim 1 , wherein the control unit comprises a table that converts the number of a designated memory cell into an address of a corresponding memory cell.