W9812G2KB

1M  4 BANKS  32 BITS SDRAM

Publication Release Date: Jun. 20, 2014

- 1 -

Revision: A01

Table of Contents-

1.

GENERAL DESCRIPTION ......................................................................................................... 3

2.

FEATURES ................................................................................................................................. 3

3.

ORDER INFORMATION ............................................................................................................. 4

4.

BALL CONFIGURATION ............................................................................................................ 5

5.

BALL DESCRIPTION.................................................................................................................. 6

6.

BLOCK DIAGRAM (SINGLE CHIP) ............................................................................................ 7

7.

FUNCTIONAL DESCRIPTION.................................................................................................... 8

7.1

Power Up and Initialization ............................................................................................. 8

7.2

Programming Mode Register Set command .................................................................. 8

7.3

Bank Activate Command ................................................................................................ 8

7.4

Read and Write Access Modes ...................................................................................... 8

7.5

Burst Read Command .................................................................................................... 9

7.6

Burst Command .............................................................................................................. 9

7.7

Read Interrupted by a Read ........................................................................................... 9

7.8

Read Interrupted by a Write............................................................................................ 9

7.9

Write Interrupted by a Write............................................................................................ 9

7.10

Write Interrupted by a Read............................................................................................ 9

7.11

Burst Stop Command ................................................................................................... 10

7.12

Addressing Sequence of Sequential Mode .................................................................. 10

7.13

Addressing Sequence of Interleave Mode.................................................................... 10

7.14

Auto-precharge Command ........................................................................................... 11

7.15

Precharge Command.................................................................................................... 11

7.16

Self Refresh Command ................................................................................................ 11

7.17

Power Down Mode ....................................................................................................... 12

7.18

No Operation Command............................................................................................... 12

7.19

Deselect Command ...................................................................................................... 12

7.20

Clock Suspend Mode.................................................................................................... 12

8.

OPERATION MODE ................................................................................................................. 13

9.

ELECTRICAL CHARACTERISTICS......................................................................................... 14

9.1

Absolute Maximum Ratings .......................................................................................... 14

9.2

Recommended DC Operating Conditions .................................................................... 14

9.3

Capacitance .................................................................................................................. 14

9.4

DC Characteristics ........................................................................................................ 15

9.5

AC Characteristics and Operating Condition................................................................ 16

10.

TIMING WAVEFORMS ............................................................................................................. 18

10.1

Command Input Timing ................................................................................................ 18

10.2

Read Timing.................................................................................................................. 19

10.3

Control Timing of Input/Output Data ............................................................................. 20