摘要:
A verify sense amplifier (19) reads data from a non-volatile memory cell to be rewritten. The readout data is compared to expected data in a comparator circuit (21). Upon completion of rewriting, the comparator circuit (21) outputs a match signal MCH. A selector (23) outputs a decode signal STR(i) or SWP(i) indicative of a volatile data retaining unit (25), in correspondence with the non-volatile memory cell MC to be rewritten. According to a verify instruction signal PGV/ERV, the readout data read by the verify sense amplifier (19) is stored in the volatile data retaining unit (25). Control is performed with a match signal MCH instead of the verify instruction signal PGV/ERV, thereby storing the data in the volatile data retaining unit (25) upon completion of rewriting. Therefore, there is no need to re-read operational information from the non-volatile storage.
摘要:
A verify sense amplifier (19) reads data from a non-volatile memory cell to be rewritten. The readout data is compared to expected data in a comparator circuit (21). Upon completion of rewriting, the comparator circuit (21) outputs a match signal MCH. A selector (23) outputs a decode signal STR(i) or SWP(i) indicative of a volatile data retaining unit (25), in correspondence with the non-volatile memory cell MC to be rewritten. According to a verify instruction signal PGV/ERV, the readout data read by the verify sense amplifier (19) is stored in the volatile data retaining unit (25). Control is performed with a match signal MCH instead of the verify instruction signal PGV/ERV, thereby storing the data in the volatile data retaining unit (25) upon completion of rewriting. Therefore, there is no need to re-read operational information from the non-volatile storage.
摘要:
When an initializing operation starts, a busy state indicative of the disenable of access operation is set (S11), and read operation information is read out by preferentially using a verify sense amplifier 4 or a high-speed read sense amplifier 3 (S12). Upon completion of latching the read operation information (S13: Y), a ready state that announces that the read access operation from a non-redundant memory region is enabled is set (S14), and a ready signal is outputted according to an external read access request to the non-redundant memory region. A boot program or the like which is in the non-redundant memory region can be read out in parallel with the read of the operation information. Subsequently, the redundancy information is read out (S15), and a ready state that announces that the read access operation from all of the memory regions is enabled is set upon completion of reading out the redundancy information (S17). Thereafter, rewrite operation information is read out (S18). The period of time since the start of the initializing operation to the start of the read access operation can thereby be reduced.
摘要:
When an initializing operation starts, a busy state indicative of the disenable of access operation is set (S11), and read operation information is read out by preferentially using a verify sense amplifier 4 or a high-speed read sense amplifier 3 (S12). Upon completion of latching the read operation information (S13: Y), a ready state that announces that the read access operation from a non-redundant memory region is enabled is set (S14), and a ready signal is outputted according to an external read access request to the non-redundant memory region. A boot program or the like which is in the non-redundant memory region can be read out in parallel with the read of the operation information. Subsequently, the redundancy information is read out (S15), and a ready state that announces that the read access operation from all of the memory regions is enabled is set upon completion of reading out the redundancy information (S17). Thereafter, rewrite operation information is read out (S18). The period of time since the start of the initializing operation to the start of the read access operation can thereby be reduced.
摘要:
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.
摘要:
Disclosed is a novel carcinostatic composition comprising 4,6-0-benzylidene-D-glucopyranose as the active ingredient. This active ingredient exerts a very high carcinostatic activity according to a specific carcinostatic mechanism quite different from that of conventional carcinostatic chemotherapeutic agents. The active ingredient is very low in toxicity and is highly stable and water-soluble. This composition is effective against selected malignant conditions which are carcinoma of the colon, cancer of the stomach, cancer of the tongue, peritonitis carcinomatosa, cancer of the liver and malignancies induced by SV.sub.40 virus.
摘要:
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.
摘要:
A nonvolatile memory device which can reduce consumption current and shorten access time and a control method thereof is provided. The nonvolatile memory device 1 comprises a booster controller circuit 10, a booster circuit 20, a level-shifting circuit 30, a Y-decoder 40, and a main circuit 50. A NAND gate ND1, a NOR gate NR1, and a NOR gate NR2 provided in the booster controller circuit 10 output kick signals KICK0 to KICK2. The booster circuit 20 comprises boosting systems B0, B1, B2 which respectively receive the kick signals KICK0, KICK1, and KICK2. The kick signals KICK0 and KICK1 outputted from the NAND gate ND1 and the NOR gate NR1 make transition to high level in accordance with the transition of column address coladd from address 7 to 8. Therefore, the boosting system B0 is activated in addition to the boosting system B1.
摘要:
It is intended to provide control method and a nonvolatile semiconductor memory device capable of erase operation or write operation in high speed securing reliability without applying excessive electric field. An operation unit consists of a plurality of operation cycles each of which has a bias-application period and a verification period. Addition voltage ΔV is added to each operation unit as bias voltage, whereby a write operation can be carried out with characteristic of injected current IFG that is uniform among respective operation units duration of which are generally same. In this case, duration of operation cycles are shortened by each operation unit and duration of verification periods are shortened so as to avoid a situation such that a write operation completes in the middle of a bias-application period and after that, another write operation continues to cause excessive voltage stress on non-volatile semiconductor memory cells.
摘要:
Benzoyl phenoxy acetic acid derivatives having the formula ##STR1## wherein R.sub.1 represents hydrogen or halogen atom or a lower alkyl group or a lower alkoxyl group; and R.sub.2 represents hydrogen atom or a lower alkyl group which impart excellent antihyperlipidemic activity are provided.