SST25VF040-20-4C-QAE SST [Silicon Storage Technology, Inc], SST25VF040-20-4C-QAE Datasheet - Page 3

• Manufacturer Part Number: SST25VF040-20-4C-QAE
• Description: 4 Mbit SPI Serial Flash
• Manufacturer: SST [Silicon Storage Technology, Inc]

4 Mbit SPI Serial Flash
SST25VF040
PIN DESCRIPTION
TABLE 1: Pin Description
©2006 Silicon Storage Technology, Inc.
Symbol Pin Name
SCK
SI
SO
CE#
WP#
HOLD#
V
V
DD
SS
FIGURE 2: Pin Assignments
Serial Clock
Serial Data
Input
Serial Data
Output
Chip Enable
Write Protect
Hold
Power Supply
Ground
WP#
V SS
CE#
SO
1
2
3
4
8-
Functions
To provide the timing of the serial interface.
Commands, addresses, or input data are latched on the rising edge of the clock input, while output
data is shifted out on the falling edge of the clock input.
To transfer commands, addresses, or data serially into the device.
Inputs are latched on the rising edge of the serial clock.
To transfer data serially out of the device.
Data is shifted out on the falling edge of the serial clock.
The device is enabled by a high to low transition on CE#. CE# must remain low for the duration of
any command sequence.
The Write Protect (WP#) pin is used to enable/disable BPL bit in the status register.
To temporarily stop serial communication with SPI flash memory without resetting the device.
To provide power supply (2.7-3.6V).
LEAD
Top View
1231 08-soic P1.0
SOIC
8
7
6
5
V DD
HOLD#
SCK
SI
3
WP#
CE#
V SS
SO
1
2
3
4
8-
CONTACT
Top View
1231 08-wson P2.0
WSON
EOL Product Data Sheet
8
7
6
5
V DD
HOLD#
SCK
SI
S71231(04)-01-EOL
T1.0 1231(04)
09/10