HM5264405FTT-75 datasheet(10/67 Pages) HITACHI

Part #	HM5264405FTT-75

Description	64M LVTTL interface SDRAM 133 MHz/100 MHz

Download	67 Pages

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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10 / 67 page

HM5264165F/HM5264805F/HM5264405F-75/A60/B60

10

V

SS and VSSQ (power supply pins): Ground is connected. (VSS is for the internal circuit and VSSQ is for the

output buffer.)

Command Operation

Command Truth Table

The SDRAM recognizes the following commands specified by the

CS, RAS, CAS, WE and address pins.

CKE

Command

Symbol

n - 1 n

CS RAS CAS WE A12/A13 A10

A0

to A11

Ignore command

DESL

H

×

H

×××

×

No operation

NOP

H

×

L

HHH

××

×

Burst stop in full page

BST

H

×

L

HHL

××

×

Column address and read command

READ

H

×

LH

L

H

V

L

V

Read with auto-precharge

READ A

H

×

LH

L

H

V

H

V

Column address and write command

WRIT

H

×

LH

L

V

L

V

Write with auto-precharge

WRIT A

H

×

LH

L

V

H

V

Row address strobe and bank active

ACTV

H

×

LL

H

V

Precharge select bank

PRE

H

×

LL

H

L

V

L

×

Precharge all bank

PALL

H

×

LL

H

L

×

H

×

Refresh

REF/SELF H

V

L

H

××

×

Mode register set

MRS

H

×

L

LLL

V

Note:

H: V

IH.

L: V

IL. ×: VIH or VIL.

V: Valid address input

Ignore command [DESL]: When this command is set (

CS is High), the SDRAM ignore command input at

the clock. However, the internal status is held.

No operation [NOP]: This command is not an execution command. However, the internal operations

continue.

Burst stop in full-page [BST]: This command stops a full-page burst operation (burst length = full-page

(256; HM5264165F, 512; HM5264805F, 1024; HM5264405F)), and is illegal otherwise.

When data

input/output is completed for a full page of data, it automatically returns to the start address, and input/output

is performed repeatedly.

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HM5264405FTT-75 Datasheet(PDF) 10 Page - Hitachi Semiconductor

HM5264405FTT-75 Datasheet(HTML) 10 Page - Hitachi Semiconductor

Similar Part No. - HM5264405FTT-75

Similar Description - HM5264405FTT-75

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