LE28FV4001R-25 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LE28FV4001R-25

4MEG (52488 × 8 Bits) Flash Memory

SANYO -> Panasonic 

Pin Functions

Symbol

A18 to A0

Pin

Address input

DQ7 to DQ0 Data input and output

CE

OE

WE

VDD

VSS

N.C.

Chip enable

Output enable

Write enable

Power supply

Ground

No connection

LE28FV4001M, T, R-20/25

Functions

Supply the memory address to these pins.

The address is latched internally during a write cycle.

These pins output data during a read cycle and input data during a write cycle.

Data is latched internally during a write cycle.

Outputs go to the high-impedance state when either OE or CE is high.

The device is active when CE is low.

When CE is high, the device becomes unselected and goes to the standby state.

Makes the data output buffers active.

OE is a low-active input.

Makes the write operation active.

WE is an active-low input.

Apply 3.3 V ±0.3 V to this pin.

These pins are not connected to the chip internally.

Function Logic

Mode

Read

Write

Standby or write inhibit

Write inhibit

Product identification

CE

OE

WE

A18 to A0

DQ7 to DQ0

VIL

VIL

VIH AIN

VIL

VIH

VIL AIN

VIH

X

XX

X

VIL

XX

X

X

VIH X

DOUT

DIN

High-Z

High-Z/DOUT

High-Z/DOUT

A18 to A10 = VIL, A8 to A1 = VIL, Manufacturer code (BF)

VIL

VIL

VIH A9 = 12 V, A0 = VIL

A18 to A10 = VIL, A8 to A1 = VIL, Device code (04)

A9 = 12 V, A0 = VIH

Command Settings

Command

Sector erase

Byte program

Reset

Read ID

Software data unprotect

Software data protect

Request

cycles

2

2

1

3

7

7

Setup command cycle

Operation

Address

Data

Write

X

20H

Write

X

10H

Write

X

FFH

Write

X

90H

See Figure 9.

See Figure 10.

Execute command cycle

SDP

Operation

Address

Data

Write

Sector address

D0H

N

Write

Program address Program data N

Y

Read

(7)

(7)

Y

Notes on command settings

1. X = high or low

2. The sector address is taken from A8 to A18, the sector size is 256 bytes, and A0 to A7 can be high or low during a sector erase operation.

3. The program address is taken from A0 to A18.

4. Data is displayed in hexadecimal.

5. SDP refers to the software data protect function, which uses a 7-byte read cycle sequence.

Y = Can be executed even when the software data protect function is enabled.

N = Cannot be executed when the software data protect function is enabled.

6. Figures 9 and 10 show the operation of the software data protect function using 7-byte read cycle sequences.

7. When an address of 0000 is specified, the manufacturer code, BF, is output, and when the address is 0001, the device code, 04, is output.

No. 5468-3/14

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