
8/5/05
Am29F004B
3
A D V A N C E I N F O R M A T I O N
TABLE OF CONTENTS
Product Selector Guide . . . . . . . . . . . . . . . . . . . . .4
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . .5
Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .6
Logic Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Ordering Information . . . . . . . . . . . . . . . . . . . . . . .7
Device Bus Operations . . . . . . . . . . . . . . . . . . . . . .8
Am29F004B Device Bus Operations ................................................8
Requirements for Reading Array Data .....................................8
Writing Commands/Command Sequences ..............................8
Program and Erase Operation Status...................................... 8
Standby Mode.......................................................................... 8
Output Disable Mode ................................................................9
Am29F004B Top Boot Block Sector Addresses ...............................9
Am29F004B Bottom Boot Block Sector Addresses ..........................9
Autoselect Mode .....................................................................10
Am29F004B Autoselect Codes (High Voltage Method) ..................10
Sector Protection/Unprotection ...............................................10
In-System Sector Protect/Sector Unprotect Algorithms ..................11
Temporary Sector Unprotect ..................................................12
Temporary Sector Unprotect Operation ..........................................12
Hardware Data Protection ......................................................13
Low V
CC
Write Inhibit ......................................................................13
Write Pulse Glitch Protection ..........................................................13
Logical Inhibit ..................................................................................13
Power-Up Write Inhibit ....................................................................13
Command Definitions . . . . . . . . . . . . . . . . . . . . . .13
Reading Array Data ................................................................13
Reset Command .....................................................................13
Autoselect Command Sequence ............................................13
Byte Program Command Sequence .......................................13
Program Operation ..........................................................................14
Chip Erase Command Sequence ...........................................14
Sector Erase Command Sequence ........................................14
Erase Operation ..............................................................................15
Erase Suspend/Erase Resume Commands ...........................15
Am29F004B Command Definitions .................................................16
Write Operation Status . . . . . . . . . . . . . . . . . . . . .17
DQ7: Data# Polling .................................................................17
Data# Polling Algorithm ...................................................................17
DQ6: Toggle Bit I ....................................................................18
DQ2: Toggle Bit II ...................................................................18
Reading Toggle Bits DQ6/DQ2 ...............................................18
DQ5: Exceeded Timing Limits ................................................18
DQ3: Sector Erase Timer .......................................................18
Toggle Bit Algorithm .......................................................................19
Write Operation Status ...................................................................19
Absolute Maximum Ratings . . . . . . . . . . . . . . . . 20
Maximum Negative Overshoot Waveform .....................................20
Maximum Positive Overshoot Waveform .......................................20
Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . 20
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 21
TTL/NMOS Compatible ..........................................................21
CMOS Compatible ..................................................................22
Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Test Setup ......................................................................................23
Test Specifications .........................................................................23
Key to Switching Waveforms . . . . . . . . . . . . . . . 23
AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 24
Read Operations ....................................................................24
Read Operations Timings ..............................................................24
Erase/Program Operations .....................................................25
Program Operation Timings ...........................................................26
Chip/Sector Erase Operation Timings ............................................26
Data# Polling Timings (During Embedded Algorithms) ..................27
Toggle Bit Timings (During Embedded Algorithms) .......................27
DQ2 vs. DQ6.................................................................................. 27
Sector Unlock Sequence Timing Diagram..................................... 28
Sector Relock Timing Diagram ......................................................28
Sector Protect/Unprotect Timing Diagram .....................................29
Alternate CE# Controlled Erase/Program Operations ............30
Alternate CE# Controlled Write Operation Timings ........................31
Erase and Programming Performance . . . . . . . 32
Latchup Characteristics . . . . . . . . . . . . . . . . . . . 32
PLCC Pin Capacitance . . . . . . . . . . . . . . . . . . . . 32
Data Retention . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 33
PL 032—32-Pin Plastic Leaded Chip Carrier .........................33
Revision Summary . . . . . . . . . . . . . . . . . . . . . . . . 34