发明公开
- 专利标题: Multi-mode memory device
- 专利标题(中): 在mehrere Betriebsarten umschaltbare Speicheranordnung。
-
申请号: EP88201219.8申请日: 1988-06-15
-
公开(公告)号: EP0295751A1公开(公告)日: 1988-12-21
- 发明人: Van Zanten, Adrianus Teunis , Veendrick, Hendrikus Josephius Maria , Steenhof, Frits Anthonie , Frencken, Peter Hubertus , Nillesen, Antonius Hendrikus Hubertus Jozef , van der Sanden, Cornelis Gerardus Leonardus Maria
- 申请人: Philips Electronics N.V.
- 申请人地址: Groenewoudseweg 1 5621 BA Eindhoven NL
- 专利权人: Philips Electronics N.V.
- 当前专利权人: Philips Electronics N.V.
- 当前专利权人地址: Groenewoudseweg 1 5621 BA Eindhoven NL
- 代理机构: Faessen, Louis Marie Hubertus
- 优先权: NL8701392 19870616
- 主分类号: G11C19/28
- IPC分类号: G11C19/28
摘要:
The invention relates to a memory device of the charge-coupled shift register type which is subdivided into four sections each of which has a storage capacity of, for example 208,800 bits and which can operate in different modes: parallel-in/parallel-out (as background video memory); 2x2 parallel-in, demultiplex/multiplex mode, for example for 100 Hz TV; scan mode; parallel-in-recirculation mode; "shortened" memory, for example for 525-line system, etcetera. Control is realized via a decoding and timing block in which a multi-bit control word is serially input and decoded. In a scan mode (for example, as a teletext memory), the memory sections are scanned one-by-one under the control of a separate scan register in which a scan bit (logic 1) is step-wise shifted until all sections have been read. Via a data output, the scan bit is transferred, for example to the scan register of a further memory device (via its serial data input) which is connected in series with the former memory device.
公开/授权文献
- EP0295751B1 Multi-mode memory device 公开/授权日:1992-01-08
信息查询