Preliminary
iii
28F1602C3, 28F1604C3, 28F3204C3
Contents
1.0
Introduction
..................................................................................................................1
1.1
Document Conventions.........................................................................................1
1.2
Product Overview..................................................................................................1
1.3
Package Ballout ....................................................................................................2
1.4
Signal Definitions...................................................................................................3
Principles of Operation
............................................................................................5
2.1
Bus Operation .......................................................................................................5
2.1.1
Read.........................................................................................................5
2.1.2
Output Disable..........................................................................................6
2.1.3
Standby....................................................................................................6
2.1.4
Flash Reset ..............................................................................................7
2.1.5
Write.........................................................................................................7
Flash Memory Modes of Operation
.....................................................................7
3.1
Read Array (FFH)..................................................................................................7
3.2
Read Identifier (90H).............................................................................................7
3.3
Read Status Register (70H)..................................................................................8
3.3.1
Clear Status Register (50H) .....................................................................8
3.4
Read Query (98H).................................................................................................9
3.5
Word Program (40H/10H) .....................................................................................9
3.5.1
Suspending and Resuming Program (B0H/D0H).....................................9
3.6
Block Erase (20H)...............................................................................................10
3.6.1
Suspending and Resuming Erase (B0H/D0H) .......................................10
3.7
Instant, Individual Block Locking.........................................................................12
3.7.1
Block Locking Operation Summary........................................................13
3.7.2
Locked State ..........................................................................................13
3.7.3
Unlocked State.......................................................................................13
3.7.4
Lock-Down State....................................................................................13
3.7.5
Reading a Block’s Lock Status...............................................................14
3.7.6
Locking Operation during Erase Suspend..............................................14
3.7.7
Status Register Error Checking..............................................................14
3.8
128-Bit Protection Register .................................................................................15
3.8.1
Reading the Protection Register ............................................................15
3.8.2
Programming the Protection Register (C0H)..........................................15
3.8.3
Locking the Protection Register .............................................................16
3.9
Additional Flash Features....................................................................................16
3.9.1
Improved 12 Volt Production Programming ...........................................16
3.9.2
F-V
PP
≤
V
PPLK
for Complete Protection .................................................17
Electrical Specifications
........................................................................................17
4.1
Absolute Maximum Ratings.................................................................................17
4.2
Operating Conditions...........................................................................................18
4.3
Capacitance ........................................................................................................18
4.4
DC Characteristics ..............................................................................................19
4.5
Flash AC Characteristics—Read Operations......................................................23
4.6
Flash AC Characteristics—Write Operations......................................................24
2.0
3.0
4.0