MITSUBISHI LSIs

M5M417400CJ,TP-5,-6,-7,-5S,-6S,-7S

FAST PAGE MODE 16777216-BIT (4194304-WORD BY 4-BIT) DYNAMIC RAM

2

FUNCTION

The M5M417400CJ,TP provide, in addition to normal read, write, and read-modify-write operations, a number of other functions, e.g., fast

page mode, RAS-only refresh, and delayed-write. The input conditions for each are shown in Table 1.

Table 1 Input conditions for each mode

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

BLOCK DIAGRAM

Operation

Inputs

Input/Output

Refresh

Remark

RAS

CAS

W

OE

Row

address

Column

address

Input

Output

Read

ACT

ACT

NAC

ACT

APD

APD

OPN

VLD

YES

Fast

page

mode

identical

Write (Early write)

ACT

ACT

ACT

DNC

APD

APD

VLD

OPN

YES

Write (Delayed write)

ACT

ACT

ACT

DNC

APD

APD

VLD

IVD

YES

Read-modify-write

ACT

ACT

ACT

ACT

APD

APD

VLD

VLD

YES

RAS-only refresh

ACT

NAC

DNC

DNC

APD

DNC

DNC

OPN

YES

Hidden refresh

ACT

ACT

NAC

ACT

APD

DNC

OPN

VLD

YES

Self refresh

ACT

ACT

NAC

DNC

DNC

DNC

DNC

OPN

YES

CAS before RAS refresh

ACT

ACT

NAC

DNC

DNC

DNC

DNC

OPN

YES

Stand-by

NAC

DNC

DNC

DNC

DNC

DNC

DNC

OPN

NO