器件名称: 256MBDDRSDRAM
功能描述: DDR SDRAM Specification Version 0.3
文件大小: 658.68KB 共51页
简 介:256Mb DDR SDRAM
Preliminary
DDR SDRAM Specification Version 0.3
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REV. 0.3 November 2. 2000
256Mb DDR SDRAM
Revision History
Version 0 (May, 2000) - First version for internal review of 256Mb B-die. Version 0.1(July,2000) - Added DC target spec values - Deleted tDAL in AC parameter X Version 0.2(October,2000) - Updated DC current spec Version 0.3(November,2000) - Changed spec to preliminery from target
Preliminary
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REV. 0.3 November 2. 2000
256Mb DDR SDRAM
Contents
Revision History General Information
1. Key Features 1.1 Features 1.2 Operating Frequencies 2. Package Pinout & Dimension 2.1 Package Pintout 2.2 Input/Output Function Description 2.3 66 Pin TSOP(II)/MS-024FC Package Physical Dimension 3. Functional Description 3.1 Simplified State Diagram 3.2 Basic Functionality
3.2.1 Power-Up Sequence 3.2.2 Mode Register Definition
3.2.2.1 Mode Register Set(MRS) 3.2.2.2 Extended Mode Register Set(EMRS)
Preliminary
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9 9 10 11 12 12 13 13 14 14 16 17 17 18 18 18 19 19 20 21 21 22 23
3.2.3 Precharge 3.2.4 No Operation(NOP) & Device Deselect 3.2.5 Row Active 3.2.6 Read Bank 3.2.7 Write Bank
3.3 Essential Functionality for DDR SDRAM
3.3.1 Burst Read Operation 3.3.2 Burst Write Operation 3.3.3 Read Interrupted by a Read 3.3.4 Read Interrupted by a Write & Burst Stop 3.3.5 Read Interrupted by a Precharge 3.3.6 Write Interrupted by a Write
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REV. 0.3 November 2. 2000
256Mb DDR SDRAM
3.3.7 Write Interrupted by a Read & DM 3.3.8 Write Interrupted by……
