W29C020C12BN中文资料

W29C020C

256K × 8 CMOS FLASH MEMORY

Table of Contents-

1. 2. 3. 4. 5. 6.

GENERAL DESCRIPTION.........................................................................................................3 FEATURES.................................................................................................................................3 PIN CONFIGURATIONS.............................................................................................................4 PIN CONFIGURATIONS.............................................................................................................5 BLOCK DIAGRAM......................................................................................................................5 FUNCTIONAL DESCRIPTION....................................................................................................6 6.1 Read Mode.....................................................................................................................6 6.2 Page Write Mode............................................................................................................6 6.3 Software-protected Data Write.......................................................................................6 6.4 Hardware Data Protection..............................................................................................7 6.5 Chip Erase Modes..........................................................................................................7 6.6 Boot Block Operation......................................................................................................7 6.7 Data Polling (DQ7)- Write Status Detection...................................................................7 TABLE OF OPERATING MODES..............................................................................................9 7.1 Operating Mode Selection..............................................................................................9 7.2 Command Codes for Software Data Protection.............................................................9

7.2.1 Software Data Protection Acquisition Flow.....................................................................10

7.

7.3 7.4 7.5 8.

Command Codes for Software Chip Erase..................................................................11

7.3.1 Software Chip Erase Acquisition Flow............................................................................11

Command Codes for Product Identification and Boot Block Lockout Detection..........12

7.4.1 Software Product Identification and Boot Block Lockout Detection Acquisition Flow......12

Command Codes for Boot Block Lockout Enable........................................................13

7.5.1 Boot Block Lockout Enable Acquisition Flow..................................................................13

9. 10.

DC CHARACTERISTICS..........................................................................................................14 8.1 Absolute Maximum Ratings..........................................................................................14 8.2 Operating Characteristics.............................................................................................14 CAPACITANCE.........................................................................................................................15 AC CHARACTERISTICS..........................................................................................................16 10.1 Read Cycle Timing Parameters....................................................................................16 10.2 Byte/Page-write Cycle Timing Parameters...................................................................17

10.2.1 #DATA Polling Characteristics (1)..................................................................................17

11.

10.3 Toggle Bit Characteristics (1).......................................................................................17 TIMING WAVEFORMS.............................................................................................................18 11.1 Read Cycle Timing Diagram.........................................................................................18 11.2 #WE Controlled Write Cycle Timing Diagram...............................................................18 11.3 #CE Controlled Write Cycle Timing Diagram...............................................................19 11.4 Page Write Cycle Timing Diagram................................................................................19

Publication Release Date: Nov. 23, 2006

Revision A7

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W29C020C

11.5 #DATA Polling Timing Diagram....................................................................................20 11.6 Toggle Bit Timing Diagram...........................................................................................20 11.7 Page Write Timing Diagram Software Data Protection Mode......................................21 11.8 Reset Software Data Protection Timing Diagram.........................................................21 11.9 Software Chip Erase Timing Diagram..........................................................................22 ORDERING INFORMATION.....................................................................................................23 HOW TO READ THE TOP MARKING......................................................................................24 PACKAGE DIMENSIONS.........................................................................................................25 14.1 32-pin P-DIP.................................................................................................................25 14.2 32-pin TSOP.................................................................................................................25 14 …… 此处隐藏：17712字，全部文档内容请下载后查看。喜欢就下载吧 ……