5

■ FUNCTION TRUTH TABLE

*1 : Should not be kept this logic condition longer than 1

µs.

*2 : Power Down mode can be entered from Standby state and all DQ pins are in High-Z state.

Data retention depends on the selection of Power Down Program.

Refer to “■ Power Down” for the detail.

(1) Write pulse is initiated by CE1. See “(12) READ/WRITE Timing #1-1 (CE1 Control)” in “■ TIMING

DIAGRAMS”.

Mode

CE2

CE1WE

OE

LB

UB

Standby

(Deselect)

H

H

XXXX

X

High-Z

High-Z

HL

H

H

X

X

*3

High-Z

High-Z

Output Disable

(No Read)

HL

H

H

Valid

High-Z

High-Z

Read (Upper Byte)

H

L

Valid

High-Z

Output

Valid

Read (Lower Byte)

L

H

Valid

Output

Valid

High-Z

Read (Word)

L

L

Valid

Output

Valid

Output

Valid

No Write

H

H

Valid

Invalid

Invalid

Write (Upper Byte)

H

L

Valid

Invalid

Input Valid

Write (Lower Byte)

L

H

Valid

Input Valid

Invalid

Write (Word)

L

L

Valid

Input Valid Input Valid

L

XXXXX

X

High-Z

High-Z