18

Advance Information

8Mbit 1.8V SPI Serial Flash

SST25WF080

©2010 Silicon Storage Technology, Inc.

S71203-03-000

04/10

Enable-Hold (EHLD)

The 8-bit command, AAH, Enable-Hold instruction enables

the HOLD functionality of the RST#/HOLD# pin. CE# must

remain active low for the duration of the Enable-Hold

instruction sequence. CE# must be driven high before the

instruction is executed. See Figure 22 for the Enable-Hold

instruction sequence.

FIGURE 22: Enable-Hold Sequence

Read-ID

The Read-ID instruction identifies the manufacturer as SST

and the device as SST25WF080. Use the Read-ID instruc-

tion to identify SST device when using multiple manufactur-

ers in the same socket. See Table 7.

The device information is read by executing an 8-bit com-

lowing the Read-ID instruction, the manufacturer’s ID is

located in address 000000H and the device ID is located in

address 000001H. Once the device is in Read-ID mode,

the manufacturer’s and device ID output data toggles

between address 000000H and 000001H until terminated

by a low to high transition on CE#.

FIGURE 23: Read-ID Sequence

CE#

SO

SI

SCK

01 2 3 4 5 6 7

AA

HIGH IMPEDANCE

MODE 0

MODE 3

1203 F21.0

MSB

TABLE

7: Product Identification

Address

Data

Manufacturer’s ID

000000H

BFH

Device ID

SST25WF080

000001H

05H

T7.1203

1203 F22.0

CE#

SO

SI

SCK

00

01 2 3 4 5 6 7 8

00

ADD

90 or AB

HIGH IMPEDANCE

15 16

23 24

31 32

39 40

47 48

55 56

63

BF

Device ID

BF

Device ID

Note: 1. The manufacturer's and device ID output stream is continuous until terminated by a low to high transition on CE#.

2. 00H will output the manfacturer's ID first and 01H will output device ID first before toggling between the two.

HIGH

IMPEDANCE

MODE 3

MODE 0

MSB

MSB

MSB