MITSUBISHI LSIs

MH8V6445BWZJ -5, -6

Preliminary Spec.

MITSUBISHI

ELECTRIC

24/Jul./1998

HYPER PAGE MODE 536870912 - BIT ( 8388608 - WORD BY 64 - BIT ) DYNAMIC RAM

MIT-DS-0234-0.0

(

/ 22 )

Specifications subject to

change without notice.

FUNCTION

The MH8V6445BWZJ provide, in addition to normal

read, write, and read-modify-write operations,

a number of other functions, e.g., Hyper page mode,

/CAS before /RAS refresh, and delayed-write. The

input conditions for each are shown in Table 1.

Table 1 Input conditions for each mode

Operation

/RAS

/CAS

Inputs

Input/Output

Refresh

Remark

/W

Row

address address

Column

Output

Read

Write (Early write)

Write (Delayed write)

Read-modify-write

/CAS before /RAS refresh

ACT

ACT

ACT

ACT

ACT

ACT

ACT

ACT

ACT

ACT

ACT

ACT

NAC

ACT

ACT

ACT

DNC

NAC

APD

APD

APD

APD

DNC

DNC

OPN

VLD

IVD

VLD

VLD

OPN

YES

YES

YES

YES

YES

YES

Hyper page

mode

identical

Note : ACT : active, NAC : nonactive, DNC : don' t care, VLD : valid, IVD : Invalid, APD : applied, OPN : open

/OE

ACT

DNC

DNC

ACT

ACT

DNC

APD

APD

APD

APD

DNC

DNC

Input

VLD

VLD

VLD

OPN

DNC

OPN

4

Standby

NAC

DNC

DNC

DNC

OPN

NO

DNC

DNC

DNC

Hidden refresh