M28W640CT datasheet(3/54 Pages) STMICROELECTRONICS

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M28W640CT, M28W640CB

Table 3.Commands ..... ...... ....... ...... ....... ...... ....... ...... ...... ....14

Table 4.Read ElectronicSignature ....... ...... ....... ...... ....... ...... ...... ....14

Table 5. Read Block Lock Signature ...... ...... ....... ...... ....... ...... ...... ....15

Table 6.Read Protection Register and Lock Register ..... ...... ....... ...... ...... ....15

Table 7.Program,Erase Times and Program/Erase Endurance Cycles .... ...... ...... .... 16

BLOCKLOCKING.... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....16

Locked State ..... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....16

Unlocked State ... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....16

Lock-Down State .. ...... ...... ....... ...... ....... ...... ....... ...... ...... ....17

Reading a Block’s Lock Status . . . ....... ...... ....... ...... ....... ...... ...... .... 16

Locking Operations During Erase Suspend ...... ....... ...... ....... ...... ...... ....17

Table 8.Block LockStatus ...... ....... ...... ....... ...... ....... ...... ...... ....17

Table 9.Protection Status . ...... ....... ...... ....... ...... ....... ...... ...... .... 18

STATUS REGISTER .. ...... ...... ....... ...... ....... ...... ....... ...... ...... ....19

Program/Erase Controller Status (Bit 7) ... ...... ....... ...... ....... ...... ...... ....19

Erase Suspend Status (Bit 6) .... ....... ...... ....... ...... ....... ...... ...... ....19

Erase Status(Bit 5) ...... ...... ....... ...... ....... ...... ....... ...... ...... ....19

Program Status (Bit 4) .... ...... ....... ...... ....... ...... ....... ...... ...... ....19

VPP Status (Bit 3).. ...... ...... ....... ...... ....... ...... ....... ...... ...... ....19

Program Suspend Status (Bit 2) .. ....... ...... ....... ...... ....... ...... ...... ....19

Block Protection Status (Bit 1).... ....... ...... ....... ...... ....... ...... ...... ....20

Reserved (Bit 0)... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....20

Table 10. Status Register Bits .... ....... ...... ....... ...... ....... ...... ...... ....20

MAXIMUM RATING... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....21

Table 11. Absolute Maximum Ratings ..... ...... ....... ...... ....... ...... ...... ....21

DC and AC PARAMETERS . . ...... ....... ...... ....... ...... ....... ...... ...... ....22

Table 12. Operating and AC Measurement Conditions ..... ...... ....... ...... ...... ....22

Figure 7.AC Measurement I/O Waveform . ...... ....... ...... ....... ...... ...... ....22

Figure 8. AC Measurement Load Circuit . . . ...... ....... ...... ....... ...... ...... ....22

Table 13. Capacitance.... ...... ....... ...... ....... ...... ....... ...... ...... ....22

Table 14. DC Characteristics..... ....... ...... ....... ...... ....... ...... ...... ....23

Figure 9.Read AC Waveforms ... ....... ...... ....... ...... ....... ...... ...... .... 24

Table 15. Read AC Characteristics ....... ...... ....... ...... ....... ...... ...... ....24

Figure 10. Write AC Waveforms, Write Enable Controlled . . ...... ....... ...... ...... ....25

Table 16. Write AC Characteristics, Write Enable Controlled ...... ....... ...... ...... ....26

Figure 11. Write AC Waveforms, Chip Enable Controlled ... ...... ....... ...... ...... ....27

Table 17. Write AC Characteristics, Chip Enable Controlled ...... ....... ...... ...... ....28

Figure 12. Power-Up and Reset AC Waveforms ... ....... ...... ....... ...... ...... ....29

Table 18. Power-Up and ResetACCharacteristics ....... ...... ....... ...... ...... ....29

PACKAGE MECHANICAL . . . ...... ....... ...... ....... ...... ....... ...... ...... ....30

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