GENERAL DESCRIPTION

The MT28F321P20 and MT28F321P18 are high-performance, high-density, nonvolatile memory solutions that can significantly improve system performance. This new architecture features a two-memory-bank configuration that supports background operation with no latency.

A high-performance bus interface allows a fast page mode, data transfer; a conventional asynchronous bus interface is provided as well.

The devices allow soft protection for blocks, as read only, by configuring soft protection registers with dedicated command sequences. For security purposes, two 64-bit chip protection registers are provided.

FEATURES

• Flexible dual-bank architecture

Support for true concurrent operation with zero

latency

Read bank a during program bank b and vice

versa

Read bank a during erase bank b and vice versa

• Basic configuration:

Seventy-one erasable blocks

Bank a (4Mb for data storage)

Bank b (28Mb for program storage)

• VCC, VCCQ, VPP voltages*

1.70V (MIN), 1.90V (MAX) VCC, VCCQ

(MT28F321P18)

1.80V (MIN), 2.20V (MAX) VCC, VCCQ

(MT28F321P20)

0.9V (MIN) VPP (in-system PROGRAM/ERASE)

12V ±5 (HV) VPP tolerant (factory

programming compatibility)

• Random access time: 70ns and 80ns @ 1.80V VCC*

• Page Mode read access*

Eight-word page

Interpage read access: 70ns/80ns @ 1.80V

Intrapage read access: 30ns @ 1.80V

• Low power consumption (VCC = 2.20V)

Asynchronous READ < 15mA

Standby < 50µA

Automatic power save (APS) feature

• Enhanced write and erase suspend options

ERASE-SUSPEND-to-READ within same bank

PROGRAM-SUSPEND-to-READ within same bank

ERASE-SUSPEND-to-PROGRAM within same bank

• Dual 64-bit chip protection registers for security

purposes

• Cross-compatible command support

Extended command set

Common flash interface

• PROGRAM/ERASE cycle

100,000 WRITE/ERASE cycles per block