SST49LF008A-33-4C-EIE-T【PDF 21/45 页】IC FLASH FWH 8MBIT 33MHZ 40TSOP

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Sheet目录364

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8 Mbit Firmware Hub

A Microchip Technology Company

SST49LF008A

Data Sheet

Software Command Sequence

Table 9: Software Command Sequence

Command

Sequence

1st 1

Write Cycle

2nd 1

Write Cycle

3rd 1

Write Cycle

4th 1

Write Cycle

5th 1

Write Cycle

6th 1

Write Cycle

Addr 2 Data Addr 2

Data Addr 2

Data

Byte-Program

5555H AAH 2AAAH 55H 5555H A0H

BA 3

Data

Sector-Erase

Block-Erase

5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H

SA X4

BA X5

30H

50H

Chip-Erase 6

Software ID Entry 7,8

5555H AAH 2AAAH 55H 5555H 80H 5555H AAH 2AAAH 55H 5555H 10H

5555H AAH 2AAAH 55H 5555H 90H

Software ID

Exit 9

XXH

F0H

Software ID Exit 9

5555H AAH 2AAAH 55H 5555H F0H

T9.6 25085

1. FWH Mode uses consecutive Write cycles to complete a command sequence; PP Mode uses consecutive bus cycles to

complete a command sequence.

2. Address format A 14 -A 0 (Hex), Addresses A 21 -A 15 can be V IL or V IH , but no other value, for the Command sequence in

PP Mode.

3. BA = Program Byte address

4. SA X for Sector-Erase Address

5. BA X for Block-Erase Address

6. Chip-Erase is supported in PP Mode only

7. SST Manufacturer’s ID = BFH, is read with A 0 =0,

With A 19 -A 1 = 0; 49LF008A Device ID = 5AH, is read with A 0 = 1.

8. The device does not remain in Software Product ID mode if powered down.

9. Both Software ID Exit operations are equivalent.

?2011 Silicon Storage Technology, Inc.

DS25085A

10/11

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