摘要:
Apparatus, systems, and methods are disclosed, such as those that operate within a memory device to replace one or more selected failing memory cells with one or more repair memory cells and to correct data digits read from other failing memory cells in the memory device using a different method. Additional apparatus, systems, and methods are disclosed.
摘要:
Apparatus, methods, and systems are disclosed, including those that are to prevent a bias voltage from rising to a higher level than a storage node voltage as the bias voltage transitions to a ground level. For example a first voltage generator may be utilized to generate a bias voltage to bias a transistor in a memory cell in a memory array. A second voltage generator may be utilized to generate an plate voltage. The memory cell may include a transistor on a substrate and a capacitor. The capacitor connects from a drain of the transistor to the plate voltage. The storage node voltage is located at the drain of the transistor. A power controller may provide an off signal to the first and second voltage generators. The bias voltage may then transition to ground from a voltage less than zero volts. The rate of the bias voltage rise to ground is such that the bias voltage is maintained at less than or equal to the storage node voltage during the transition time period.
摘要:
A refresh period generating circuit which generates a refresh period in refreshing a DRAM cell, comprising: an oscillation circuit which oscillates at a frequency with temperature dependence on ambient temperature; a dividing circuit which divides an oscillation output of the oscillation circuit; a temperature detector which detects the ambient temperature; and a selector which switches and selects among division outputs with respective frequencies from the dividing circuit based on an output of the temperature detector, and outputs a signal as a reference of the refresh period. The temperature dependence in the oscillation circuit includes a positive temperature coefficient in a predetermined temperature range, and does not include a positive temperature coefficient out of the predetermined temperature range. The selector switches the division outputs out of the predetermined temperature range.
摘要:
Disclosed is a semiconductor memory device having a data retention operating mode. When an entry into the data retention operating mode is performed, parity information on data of the memory cells is calculated and the error correction on the memory cells is carried out at a time of an exit from the data retention operating mode, by an ECC (Error Correction Circuit). The semiconductor memory device includes means for outputting from an NC pin flag information indicating that the semiconductor memory device is the one including the data retention operating mode, that the exit processing from the data retention operating mode is under way, and that the error correction cannot be performed.
摘要:
In a semiconductor integrated circuit device, a command decoder is adapted to receive not only an external command but also an internal command. An ECC controller has a command generator and an address generator. When the command decoder decodes an external entry command, the command generator instructs encoding to an ECC-CODEC circuit and the address generator sequentially produces addresses which are supplied to a memory array. The ECC-CODEC circuit produces check bits for error detection/correction with reference to information data of the memory array. Upon completion of an encoding operation of writing the check bits into a predetermined region of the memory array, the ECC controller delivers an end signal to the command decoder as the internal command to make a super self-refresh control circuit start a super self-refresh operation.
摘要:
In a semiconductor memory device which requires a refresh operation, a control method stops supplying a word line voltage which is a boosted voltage higher than an external supply voltage, a memory array substrate voltage which is a negative voltage supplied to a semiconductor substrate, and a bit line precharge voltage for use in reproducing data held in memory cells for a predetermined period at the end of each refresh operation. In this event, voltage output terminals of the word line and memory array substrate voltages are respectively driven to a ground potential. For recovering these voltages, the delivery of the word line voltage is stopped until the memory array substrate voltage rises to some extent.
摘要:
Disclosed is a memory device including an error rate measurement circuit and a control circuit. The error rate measurement circuit, carrying a BIST circuit, reads out and writes data for an area for monitor bits every refresh period to detect an error rate (error count) with the refresh period. The control circuit performs control for elongating and shortening the refresh period so that a desired error rate will be achieved. The BIST circuit issues an internal command and an internal address and drives the DRAM from inside. The BIST circuit writes and reads out desired data, compares the monitor bits to expected values (error decision) and counts the errors.
摘要:
The objective of the present invention is to provide a game machine, a musical tone generation device, and an information storage medium that make it possible to synchronize reproduced sounds and images, even if faults such as skips in those sounds or images occur during the reproduction of sounds and images that have been recorded on optical disk. When a game computation section (30) in this game machine instructs the reproduction of given sound data that has been recorded on an optical disk, based on the game state, sound data (96) that has been read from an optical disk (90) is reproduced by a sound reproduction section (60) and is output to a sound output section (80). During this time, a synchronization processing section (40) performs processing to obtain synchronization with the reproduced sounds, based on synchronization data that was read in together with the sound data, and instructs the images to be reproduced by an image generation section (50) and also the timing at which images are switched. Since image reproduction is based on instructions from the synchronization processing section (40) in this manner, the images can be reproduced in synchronization with the reproduced sounds.
摘要:
A simply structured, and highly reliable semiconductor apparatus having a large storage capacity. The apparatus has a plurality of memory cells on one semiconductor substrate, each including a capacitor having first and second electrodes, and a switching device having a control terminal connected to a corresponding word line among a plurality of word lines, and a current channel connected between the first electrode and a corresponding bit line among a plurality of bit lines. When the semiconductor apparatus is in a first mode, an OFF potential of the word lines is set to be a first potential, when the semiconductor apparatus is in a second mode, an OFF potential of the word lines is set to be a second potential, and a current channel of the switching device is set in a direction vertical to the semiconductor substrate.