摘要:
A semiconductor memory device is capable of performing a test operation in its various operation modes. Particularly, the semiconductor memory device can enter a test mode in other modes, as well as, an all bank pre-charge mode. The semiconductor memory device includes a test mode control block configured to generate a test signal enabled for a predetermined interval in an active mode, and a mode register set control block configured to enable a mode register set signal for a test operation in the predetermined interval in response to the test signal.
摘要:
A method of testing a semiconductor memory device comprises receiving a clock, addresses, commands, and data from a test device through channels, generating an internal bank address in response to the addresses and the commands, performing a multi-bit parallel test for each of a plurality of banks based on the addresses, the commands, the data, and the internal bank address, and providing the test device with a test result signal.
摘要:
A bank selection circuit includes a command latch unit configured to latch an input command at a time earlier than a rising edge of a clock by a setup time, a command decoder configured to decode a latched command and generate a row operation signal, a bank address latch unit configured to latch an input bank address at a time earlier than the rising edge of the clock by the setup time, a bank address decoder configured to decode a latched bank address and generate a bank selection signal, and a bank selection unit configured to receive the row operation signal and the bank selection signal and transfer the row operation signal to a bank selected by the bank selection signal.
摘要:
A shift circuit of a semiconductor device reduces the power consumption of the semiconductor device. The shift circuit comprises a plurality of shifters and a plurality of clock controllers. The plurality of shifters shifts an input signal in sequence in response to a clock. The plurality of clock each supply the clock to a corresponding shifter before an input of the corresponding shifter is activated and stop the supply of the clock to the corresponding shifter when an output of the corresponding shifter is activated.
摘要:
A method of testing a semiconductor memory device comprises receiving a clock, addresses, commands, and data from a test device through channels, generating an internal bank address in response to the addresses and the commands, performing a multi-bit parallel test for each of a plurality of banks based on the addresses, the commands, the data, and the internal bank address, and providing the test device with a test result signal.
摘要:
An self-refresh control circuit for controlling a self-refresh operation of a memory device includes a self-refresh control logic block configured to control the memory device to perform the self-refresh operation and an initial refresh control block configured to activate the self-refresh control logic block in an initialization period of the memory device.
摘要:
A delay circuit includes a delay unit configured to generate a delayed transfer signal by delaying a transfer signal corresponding to a first signal or a second signal, a distinguishment signal generation unit configured to generate a distinguishment signal which represents to what signal the transfer signal correspond between the first signal and the second signal and a delayed signal generation unit configured to output the delayed transfer signal as a first delayed signal or a second delayed signal in response to the distinguishment signal.
摘要:
A bank selection circuit includes a command latch unit configured to latch an input command at a time earlier than a rising edge of a clock by a setup time, a command decoder configured to decode a latched command and generate a row operation signal, a bank address latch unit configured to latch an input bank address at a time earlier than the rising edge of the clock by the setup time, a bank address decoder configured to decode a latched bank address and generate a bank selection signal, and a bank selection unit configured to receive the row operation signal and the bank selection signal and transfer the row operation signal to a bank selected by the bank selection signal.
摘要:
A semiconductor memory device includes first and second bank groups and an internal column address generating circuit. Each of the first and second bank groups includes at least one bank. The internal column address generating circuit converts a column address into a first internal column address and outputs the first internal column address through a first transmission line in response to a bank address if a read operation or a write operation is performed on a bank of the first bank group. Also, the internal column address generating circuit converts the column address into a second internal column address and outputs the second internal column address through a second transmission line in response to the bank address if a read operation or a write operation is performed on a bank of the second bank group.
摘要:
A semiconductor apparatus includes a comparison voltage generation unit configured to generate a plurality of different comparison voltages, a reference voltage generation unit configured to receive a generation code from an external system, select one of the plurality of the different comparison voltages according to the generation code, and generate a reference voltage, and a reference voltage determination unit configured to receive the generation code and an expected reference voltage from the external system, check whether a level of the expected reference voltage is in a target range, and output a check result to the external system.