K4H280438B-TCA0 Datasheet, PDF (4/53 Pages) Samsung semiconductor – 128Mb DDR SDRAM

128Mb DDR SDRAM
Contents
Revision History
2
General Information
9
1. Key Features
10
1.1 Features
10
1.2 Operating Frequencies
10
2. Package Pinout & Dimension
11
2.1 Package Pintout
11
2.2 Input/Output Function Description
12
2.3 66 Pin TSOP(II)/MS-024FC Package Physical Dimension
13
3. Functional Description
14
3.1 Simplified State Diagram
14
15
3.2 Basic Functionality
15
3.2.1 Power-Up Sequence
16
3.2.2 Mode Register Definition
16
3.2.2.1 Mode Register Set(MRS)
18
3.2.2.2 Extended Mode Register Set(EMRS)
19
3.2.3 Precharge
19
3.2.4 No Operation(NOP) & Device Deselect
20
3.2.5 Row Active
20
3.2.6 Read Bank
20
3.2.7 Write Bank
21
3.3 Essential Functionality for DDR SDRAM
21
3.3.1 Burst Read Operation
22
3.3.2 Burst Write Operation
23
3.3.3 Read Interrupted by a Read
23
24
3.3.4 Read Interrupted by a Write & Burst Stop
25
3.3.5 Read Interrupted by a Precharge
3.3.6 Write Interrupted by a Write
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REV. 1.0 November. 2. 2000