Details, datasheet, quote on part number: M28R400CTB90ZB6T
PartM28R400CTB90ZB6T
CategoryMemory => Flash
Description4 Mbit ( 256kb X16, Boot Block ) 1.8v Supply Flash Memory
CompanyST Microelectronics, Inc.
DatasheetDownload M28R400CTB90ZB6T datasheet
  

 

Features, Applications
4 Mbit (256Kb x16, Boot Block) 1.8V Supply Flash Memory

FEATURES SUMMARY s SUPPLY VOLTAGE VDD to 2.2V Core Power Supply VDDQ= to 2.2V for Input/Output VPP = 12V for fast Program (optional)

ACCESS TIMES: 90ns, 120ns PROGRAMMING TIME 10s typical Double Word Programming Option

COMMON FLASH INTERFACE 64 bit Security Code MEMORY BLOCKS Parameter Blocks (Top or Bottom location) Main Blocks

BLOCK LOCKING All blocks locked at Power Up Any combination of blocks can be locked WP for Block Lock-Down

SECURITY 64 bit user Programmable OTP cells 64 bit unique device identifier One Parameter Block Permanently Lockable

AUTOMATIC STAND-BY MODE PROGRAM and ERASE SUSPEND 100,000 PROGRAM/ERASE CYCLES per BLOCK ELECTRONIC SIGNATURE Manufacturer Code: 20h Top Device Code, 882Ah Bottom Device Code, M28R400CB: 882Bh

TABLE OF CONTENTS SUMMARY DESCRIPTION. 5 Figure 2. Logic Diagram. 5 Table 1. Signal Names. 5 Figure 3. TFBGA Connections (Top view through package). 6 Figure 4. Block Addresses. 7 Figure 5. Security Block Memory Map. 7 SIGNAL DESCRIPTIONS. 8 Address Inputs (A0-A17). 8 Data Input/Output (DQ0-DQ15). 8 Chip Enable (E). 8 Output Enable (G). 8 Write Enable (W). 8 Write Protect (WP). 8 Reset (RP). 8 VDD Supply Voltage 2.2V). 8 VDDQ Supply Voltage 2.2V). 8 VPP Program Supply Voltage. 8 VSS Ground. 8 BUS OPERATIONS. 9 Read. 9 Write. 9 Output Disable. 9 Standby. 9 Automatic Standby. 9 Reset. 9 Read Electronic Signature Command. 10 Table 2. Bus Operations. 9 COMMAND INTERFACE. 10 Read Memory Array Command. 10 Read Status Register Command. 10 Read Electronic Signature Command. 10 Read CFI Query Command. 10 Block Erase Command. 10 Chip Erase Command. 10 Program Command. 11 Double Word Program Command. 11 Clear Status Register Command. 11 Program/Erase Suspend Command. 11 Program/Erase Resume Command. 11 Protection Register Program Command. 12 Block Lock-Down Command. 12

Table 3. Commands. 13 Table 4. Read Electronic Signature. 14 Table 5. Read Block Lock Signature. 14 Table 6. Read Protection Register and Lock Register. 14 Table 7. Program, Erase Times and Program/Erase Endurance Cycles. 15 BLOCK LOCKING. 16 Reading a Block's Lock Status. 16 Locked State. 16 Unlocked State. 16 Lock-Down State. 16 Locking Operations During Erase Suspend. 16 Table 8. Block Lock Status. 17 Table 9. Protection Status. 17 STATUS REGISTER. 18 Program/Erase Controller Status (Bit 7). 18 Erase Suspend Status (Bit 6). 18 Erase Status (Bit 5). 18 Program Status (Bit 4). 18 VPP Status (Bit 3). 18 Program Suspend Status (Bit 2). 18 Block Protection Status (Bit 1). 19 Reserved (Bit 0). 19 Table 10. Status Register Bits. 19 MAXIMUM RATING. 20 Table 11. Absolute Maximum Ratings. 20 DC and AC PARAMETERS. 21 Table 12. Operating and AC Measurement Conditions. 21 Figure 6. AC Measurement I/O Waveform. 21 Figure 7. AC Measurement Load Circuit. 21 Table 13. Capacitance. 21 Table 14. DC Characteristics. 22 Figure 8. Read AC Waveforms. 23 Table 15. Read AC Characteristics. 23 Figure 9. Write AC Waveforms, Write Enable Controlled. 24 Table 16. Write AC Characteristics, Write Enable Controlled. 25 Figure 10. Write AC Waveforms, Chip Enable Controlled. 26 Table 17. Write AC Characteristics, Chip Enable Controlled. 27 Figure 11. Power-Up and Reset AC Waveforms. 28 Table 18. Power-Up and Reset AC Characteristics. 28


 

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