CAT28F010TR-70T datasheet(9/14 Pages) CATALYST

Part #	CAT28F010TR-70T

Description	1 Megabit CMOS Flash Memory

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Manufacturer	CATALYST [Catalyst Semiconductor]

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9 / 14 page

CAT28F010

9

Doc. No. 25005-0A 2/98 F-1

WRITE OPERATIONS

The following operations are initiated by observing the

sequence specified in the Write Command Table.

Read Mode

The device can be put into a standard READ mode by

initiating a write cycle with 00H on the data bus. The

subsequent read cycles will be performed similar to a

standard EPROM or E2PROM Read.

Signature Mode

An alternative method for reading device signature (see

Read Operations Signature Mode), is initiated by writing

the code 90H into the command register while keeping

VPP high. A read cycle from address 0000H with CE and

OE low (and WE high) will output the device signature.

CATALYST Code = 00110001 (31H)

A Read cycle from address 0001H retrieves the binary

code for the device on outputs I/O0 to I/O7.

28F010 Code = 1011 0100 (B4H)

Figure 4. A.C. Timing for Erase Operation

28F010 F11

ADDRESSES

CE (E)

OE (G)

WE (W)

DATA (I/O)

VCC

VPP

tWC

tRC

tCS

tCH

tCS

tCH

tEHQZ

tDF

tGHWL

tWPH

tWHWH2

tWHGL

tWP

tDS

HIGH-Z

DATA IN

= 20H

DATA IN

= A0H

VALID

DATA OUT

tDH

tWP

tDH

tDS

tWP

tDH

tOLZ

tOE

tOH

tLZ

tCE

tVPEL

VPPH

VPPL

0V

5.0V

VCC POWER-UP

& STANDBY

SETUP ERASE

COMMAND

ERASE

COMMAND

ERASING

ERASE VERIFY

COMMAND

ERASE

VERIFICATION

VCC POWER-DOWN/

STANDBY

tAS

tAH

DATA IN

= 20H

tWC

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