摘要:
An internal high voltage to be used in an output circuit is generated by a plurality of charge pumps according to an externally supplied clock signal, and commonly provided to output buffers of the output circuit. In a clock synchronous semiconductor device, chip occupation area as well as current dissipation can be decreased.
摘要:
For each of pads for control clock signals and address signals included in a DRAM, an n type well region is provided, and each n type well region is connected to an upper power supply source only by means of a first lower power supply line. Therefore, compared with the conventional device in which n type wells are connected to each other by a second lower power supply line, current flowing from the resistance element in a p type well to the upper power supply line is reduced. Therefore, damage to the resistance element 8 can be prevented, and surge immunity of the DRAM is increased.
摘要:
A data writing method in a DRAM comprises the steps of bringing a row address strobe input signal into an enabling state and successively changing a signal indicative of a row address while the row address strobe input signal is in the enabling state, thereby to write data successively into a plurality of memory cells designated by the row addresses.
摘要:
For each of pads for control clock signals and address signals included in a DRAM, an n type well region is provided, and each n type well region is connected to an upper power supply means only by means of a first lower power supply line. Therefore, compared with the conventional device in which n type wells are connected to each other by a second lower power supply line, current flowing from the resistance element in a p type well to the upper power supply line is reduced. Therefore, damage to the resistance element 8 can be prevented, and surge immunity of the DRAM is increased.