HY5PS1G821M datasheet(3/79 Pages) HYNIX

Part #	HY5PS1G821M

Description	1Gb DDR2 SDRAM(DDP)

Download	79 Pages

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Manufacturer	HYNIX [Hynix Semiconductor]

Direct Link	http://www.skhynix.com/kor/main.do

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3 / 79 page

Rev. 0.2 / Oct. 2005

3

1HY5PS12421(L)M

HY5PS12821(L)M

Contents

1. Description

1.1 Device Features and Ordering Information

1.1.1 Key Feaures

1.1.2 Ordering Information

1.1.3 Ordering Frequency

1.2 Pin configuration

1.2.1 256M x4 DDR2 DDP Pin Configuration

1.2.2 128M x8 DDR2 DDP Pin Configuration

1.3 Pin Description

2. Functioanal Description

2.1 Simplified State Diagram

2.2 Functional Block Diagram

2.2.1 Functional Block Diagram(256M x4)

2.2.2 Functional Block Diagram(128M x8)

2.3 Basic Function & Operation of DDR2 SDRAM

2.3.1 Power up and Initialization

2.3.2 Programming the Mode and Extended Mode Registers

2.3.2.1 DDR2 SDRAM Mode Register Set(MRS)

2.3.2.2 DDR2 SDRAM Extended Mode Register Set

2.3.2.3 Off-Chip Driver(OCD) Impedance Adjustment

2.3.2.4 ODT(On Die Termination)

2.4 Bank Activate Command

2.5 Read and Write Command

2.5.1 Posted CAS

2.5.2 Burst Mode Operation

2.5.3 Burst Read Command

2.5.4 Burst Write Operation

2.5.5 Write Data Mask

2.6 Precharge Operation

2.7 Auto Precharge Operation

2.8 Refresh Commands

2.8.1 Auto Refresh Command

2.8.2 Self Refresh Command

2.9 Power Down

2.10 Asynchronous CKE Low Event

2.11 No Operation Command

2.12 Deselect Command

3. Truth Tables

3.1 Command Truth Table

3.2 Clock Enable(CKE) Truth Table for Synchronous Transistors

3.3 Data Mask Truth Table

4. Operating Conditions

4.1 Absolute Maximum DC Ratings

4.2 Operating Temperature Condition

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HY5PS1G821M Datasheet(PDF) 3 Page - Hynix Semiconductor

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