AM29LV642D datasheet(4/53 Pages) AMD

4 / 53 page

Am29LV642D

P R E L I M I NARY

TABLE OF CONTENTS

Distinctive Characteristics . . . . . . . . . . . . . . . . . . 1

General Description . . . . . . . . . . . . . . . . . . . . . . . . 2

Product Selector Guide . . . . . . . . . . . . . . . . . . . . . 4

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . 6

Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Logic Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . 8

Device Bus Operations . . . . . . . . . . . . . . . . . . . . . . 9

Table 1. Am29LV642D Device Bus Operations ................................9

VersatileI/O

 (V

IO) Control ...................................................... 9

Requirements for Reading Array Data ..................................... 9

Writing Commands/Command Sequences ............................ 10

Accelerated Program Operation ............................................. 10

Autoselect Functions .............................................................. 10

Standby Mode ........................................................................ 10

Automatic Sleep Mode ........................................................... 10

RESET#: Hardware Reset Pin ............................................... 10

Output Disable Mode .............................................................. 11

Table 2. Sector Address Table for CE# ..........................................11

Table 3. Sector Address Table for CE2# ........................................15

Autoselect Mode ..................................................................... 19

Table 4. Am29LV642D Autoselect Codes, (High Voltage Method) 19

Sector Group Protection and Unprotection ............................. 20

Table 5. Sector Group Protection/Unprotection Address Table .....20

Temporary Sector Group Unprotect ....................................... 21

Figure 1. Temporary Sector Group Unprotect Operation................ 21

Figure 2. In-System Sector Group Protect/Unprotect Algorithms ... 22

Hardware Data Protection ...................................................... 23

Low VCC Write Inhibit ............................................................ 23

Write Pulse “Glitch” Protection ............................................... 23

Logical Inhibit .......................................................................... 23

Power-Up Write Inhibit ............................................................ 23

Common Flash Memory Interface (CFI) . . . . . . . 23

Table 6. CFI Query Identification String .......................................... 23

System Interface String................................................................... 24

Table 8. Device Geometry Definition .............................................. 24

Table 9. Primary Vendor-Specific Extended Query ........................ 25

Command Definitions . . . . . . . . . . . . . . . . . . . . . 25

Reading Array Data ................................................................ 25

Reset Command ..................................................................... 26

Autoselect Command Sequence ............................................ 26

Word Program Command Sequence ..................................... 26

Unlock Bypass Command Sequence ..................................... 26

Figure 3. Program Operation .......................................................... 27

Chip Erase Command Sequence ........................................... 27

Sector Erase Command Sequence ........................................ 28

Erase Suspend/Erase Resume Commands ........................... 28

Figure 4. Erase Operation............................................................... 29

Am29LV642D Command Definitions .............................................. 30

Write Operation Status . . . . . . . . . . . . . . . . . . . . . 31

DQ7: Data# Polling ................................................................. 31

Figure 5. Data# Polling Algorithm .................................................. 31

RY/BY#: Ready/Busy# ............................................................ 32

DQ6: Toggle Bit I .................................................................... 32

Figure 6. Toggle Bit Algorithm........................................................ 32

DQ2: Toggle Bit II ................................................................... 33

Reading Toggle Bits DQ6/DQ2 ............................................... 33

DQ5: Exceeded Timing Limits ................................................ 33

DQ3: Sector Erase Timer ....................................................... 33

Table 11. Write Operation Status ................................................... 34

Absolute Maximum Ratings . . . . . . . . . . . . . . . . 35

Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . 35

Industrial (I) Devices ............................................. 35

Extended (E) Devices ........................................... 35

CC Supply Voltages ............................................ 35

Figure 7. Maximum Negative Overshoot Waveform ..................... 35

Figure 8. Maximum Positive Overshoot Waveform ....................... 35

DC Characteristics (for Two Am29LV640

devices) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 9. I

CC1 Current vs. Time (Showing Active and

Automatic Sleep Currents) ............................................................. 37

Figure 10. Typical I

CC1 vs. Frequency ............................................ 37

Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 11. Test Setup.................................................................... 38

Table 12. Test Specifications ......................................................... 38

Figure 12. Input Waveforms and Measurement Levels ................. 38

Key to Switching Waveforms. . . . . . . . . . . . . . . . 38

AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . 39

Read-Only Operations ........................................................... 39

Figure 13. Read Operation Timings ............................................... 39

Hardware Reset (RESET#) .................................................... 40

Figure 14. Reset Timings ............................................................... 40

Erase and Program Operations .............................................. 41

Figure 15. Program Operation Timings.......................................... 42

Figure 16. Accelerated Program Timing Diagram .......................... 42

Figure 17. Chip/Sector Erase Operation Timings .......................... 43

Figure 18. Data# Polling Timings (During Embedded Algorithms). 44

Figure 19. Toggle Bit Timings (During Embedded Algorithms)...... 45

Figure 20. DQ2 vs. DQ6................................................................. 45

Temporary Sector Unprotect .................................................. 46

Figure 21. Temporary Sector Group Unprotect Timing Diagram ... 46

Figure 22. Sector Group Protect and Unprotect Timing Diagram .. 47

Figure 23. Alternate CE# Controlled Write

(Erase/Program) Operation Timings .............................................. 49

Erase And Programming Performance . . . . . . . 50

Latchup Characteristics . . . . . . . . . . . . . . . . . . . . 50

Data Retention. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . 51

LSA064—64-Ball Fortified Ball Grid Array (Fortified BGA)

13 x 11 mm package .............................................................. 51

Revision Summary . . . . . . . . . . . . . . . . . . . . . . . . 52

Revision A (August 14, 2001) ................................................. 52

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