Pseudo Static Random Access Memory (PSRAM)
A RAM device that uses a DRAM cell for high density and low bit cost, and that has an asynchronous SRAM external interface to facilitate efficient system design. It is well suited for cellphone applications, where the need for higher density working RAM is rapidly growing as more features and functions are implemented.
 Truth table
A table defining how a device's operation mode correlates to the external signals used to set that mode.
 Partial refresh
This is a feature and operating mode for devices in standby mode that limits current consumption. It refreshes some, but not all, of the bits. If the refreshed bits are storing data, the current flow will be greater, but if they are not, the current flow can be kept to a minimum.
 burst length
Burst mode is a technique to improve a device's memory-access performance. In burst mode, by synchronizing clock input from external, data of a certain number can be read out rapidly and continuously with short cycle. The "burst length" is that number of data to be output continuously.
 Mode register
An internal register that stores the control code used to govern the device's operating mode, set externally.
 Power-on sequence
A sequence of signal voltages passed through a control pin after the supply voltage is applied to it, which initializes the internal state of the device.
NEC Electronics Corporation is a wholly owned subsidiary of NEC Corporation (NASDAQ: NIPNY) (FTSE: 6701q.l), one of the world's leading providers of Internet, broadband network and enterprise business solutions. NEC Electronics specializes in semiconductor products encompassing advanced technology solutions for the broadband and communications markets, system solutions for the mobile handsets, PC peripherals, automotive and digital consumer markets, and platform solutions for a wide range of customer applications. NEC Electronics Corporation has 24 subsidiaries worldwide including NEC Electronics America, Inc. and NEC Electronics (Europe) GmbH.
For more information, please see: www.necel.com
Toshiba Corporation is a leader in information and communications systems, electronic components, consumer products, and power systems. The company's integration of these wide-ranging capabilities assures its position as a leading company in semiconductors, displays and other electronic devices. Toshiba has 176,000 employees worldwide and annual sales of over US$40 billion.
For more information, please see: http://www.toshiba.co.jp/index.htm
Fujitsu is a leading provider of customer-focused IT and communications solutions for the global marketplace. Pace-setting technologies, high-reliability/performance computing and telecommunications platforms, and a worldwide corps of systems and services experts make Fujitsu uniquely positioned to unleash the infinite possibilities of the broadband Internet to help its customers succeed. Headquartered in Tokyo, Fujitsu Limited (TSE:6702) reported consolidated revenues of 5 trillion yen (about US$38 billion) for the fiscal year ended March 31, 2002.
For more information, please see: www.fujitsu.com
Press ContactsChiaki Kuwahara, Nancy Ikehara
Press ContactsSeiko Yabuuchi
Press ContactsMakoto Yasuda
Customer ContactsSemiconductor Technical Hotline JAPAN
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Date: 17 February, 2003
Company: Fujitsu Limited, NEC Electronics Corporation, Toshiba Corporation, , ,
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