28F002BC datasheet(6/37 Pages) INTEL

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28F002BC 2-MBIT BOOT BLOCK FLASH MEMORY

PRELIMINARY

Pentium®

Processor

100/90 MHz

Cache

Main

Memory

82430FX

PCIset

(82437FX)

82430FX

PCIset

(82371FB)

Host

Bus

PCI

Bus

ISA

Bus

X-Bus

7 B

4 U

S F

2 F

4 E

5 R

PWROK

Vpp

XDIR XOE#

Intel

28F002BC

A[16:0]

CE#

OE#

WE#

RP#

DQ[7:0]

0578_01

Figure 1. 28F002BC-T Interface to a Pentium® Microprocessor System

IPP, the maximum program current, is 20 mA. The

VPP voltage for erase and program is 11.4V to

12.6V (VPP = 12V ± 5%) under all operating

conditions. Typical ICC active current is 20 mA.

The 28F002BC flash memory is also designed with

a standby mode to minimize system current drain

and allow for low-power designs. When the CE#

and RP# pins are at VCC, the CMOS standby mode

is enabled and ICC drops to about 50 µA.

A deep power-down mode is enabled when the RP#

pin is at ground. In addition to minimizing power

consumption, the deep power-down mode also

provides

write

protection

during

power-up

conditions. ICC current during deep power-down

mode is 0.20 µA typical. An initial maximum access

time or reset time of 300 ns is required from RP#

switching high until outputs are valid. Equivalently,

the device has a maximum wake-up time of 215 ns

until writes to the CUI are recognized.

When RP# is at ground, the WSM is reset, the

status register is cleared, and the entire device is

write-protected.

This

feature

prevents

data

corruption and protects the code stored in the

device during system reset. The system Reset pin

can be tied to RP# to reset the memory to read

mode at power-up. With on-chip program/erase

automation

and

RP#

functionality

for

data

protection,

the

device

protected

against

unwanted program and/or erase cycles, even

during system reset.

1.3

Applications

2-Mbit Boot Block flash memory combines high

density, high performance, and cost-effective flash

memory with blocking and hardware protection

capabilities. Its flexibility and versatility reduces

cost throughout the product life cycle. Flash

memory is ideal for Just-In-Time production flow,

reducing

system

inventory

and

costs,

and

eliminating

component

handling

during

the

production phase. During a product’s life cycle,

flash memory reduces costs by allowing user-

performed code updates and feature enhancements

via floppy disk or remote link.

The 28F002BC is a full-function blocked flash

product suitable for a wide range of applications,

including extended PC BIOS, digital cellular phone

program

and

data

storage,

telecommunication

boot/firmware, and various embedded applications

where both program and data storage are required.

28F002BC Datasheet(PDF) 6 Page - Intel Corporation

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