SST49LF016C datasheet(16/43 Pages) MICROCHIP

16 / 43 page

DS20005029B

02/16

16 Mbit LPC Serial Flash

SST49LF016C

EOL Data Sheet

Device Commands

Device operation is controlled by commands written to the Command User Interface (CUI). Execution

of a specific command is handled by internal functions after a CUI receives and processes the com-

mand. After power-up or a Reset operation the device enters Read mode. Commands consist of one

or two sequential Bus-Write operations. The commands are summarized in Table 8, “Software Com-

mand Sequence”.

Table 8: Software Command Sequence

Command

Bus Cycles

Required

First Bus Cycle

Second Bus Cycle

Oper

Addr1

1. This value must be a valid address within the device Memory Address Space. X can be VIH or VIL, but no other value.

Data

Oper

Addr1

Data

Read-Array/Reset

Write

FFH

Read-Software-ID2/

Read-Security-ID3

2. SST Manufacturer’s ID = BFH, is read with A20-A0 = 0.

SST49LF016C Device ID = 5CH, is read with A20-A1 = 0, A0 = 1.

Following the Read-Software-ID/Read-Security-ID command,

Read operations access Manufacturer’s ID and Device ID or Security ID.

3. Following the Read-Software-ID/Read-Security-ID command, Read operations access manufacturer’s ID and Device ID

or Security ID. Read-Software-ID/Read-Security-ID and Read-Status-Register will return register data until another

valid command is written.

 2

Write

90H

Read

IA4

4. IA = Device Identification Address/Security ID Address.

ID5

5. ID = Data read from identifier codes/Data read from Security ID

Read-Status-Register3

Write

70H

Read

SRD6

6. SRD = Data read from Status register

Clear-Status-Register

Write

50H

Sector-Erase7

7. The sector or block must not be write-locked when attempting Erase or Program operations.

Attempts to issue an Erase or Program command to a write-locked sector/block will fail.

Write

30H

Write

SAx8

8. SAX for Sector-Erase Address

BAX for Block-Erase Address

D0H

Block-Erase7

Write

20H

Write

BAx

D0H

Program7,9

9. The Program command operates on multiple bytes.

Write

40H

10H

Write

WA10

10. WA = Address of memory location to be written

WD11

11. WD = Data to be written at location WA

Program-/Erase-Suspend

Write

B0H

Program-/Erase-Resume

Write

D0H

User-Security-ID-Program12

12. Valid addresses for the User Security ID space are from FFFC 0188H to FFFC 019FH.

Write

A5H

Write

WA10

Data

User-Security-ID-Program-Lockout

Write

85H

Write

00H

T8.0 20005029

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