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512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit 1.8V SPI Serial Flash
A Microchip Technology Company
SST25WF512 / SST25WF010 / SST25WF020 / SST25WF040
Data Sheet
Pin Description
Top View
CE#
1
8
V DD
CE#
1
8
VDD
SO
WP#
V SS
2
3
4
7
6
5
RST#/HOLD#
SCK
SI
SO
WP#
VSS
2
3
4
Top View
7
6
5
RST#/HOLD#
SCK
SI
1328 08-wson P2.0
1328.25WF 08-soic-P0.0
8-Lead SOIC
8-Contact WSON
Figure 2: Pin Assignment for 8-Lead SOIC and 8-Contact WSON
Table 1: Pin Description
Symbol
SCK
SI
Pin Name
Serial Clock
Serial Data Input
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.
SO
Serial Data Output To transfer data serially out of the device.
Data is shifted out on the falling edge of the serial clock.
Flash busy status pin in AAI mode if SO is configured as a hardware RY/BY#
pin. See “End-of-Write Detection” on page 16. for more information.
CE#
WP#
RST#/
HOLD#
V DD
V SS
Chip Enable
Write Protect
Reset
Hold
Power Supply
Ground
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 reset the operation of the device and the internal logic. The device powers
on with RST# pin functionality as default.
To temporarily stop serial communication with SPI Flash memory while
device is selected. This is selected by an instruction sequence which is
detailed in “Reset/Hold Mode” on page 6.
To provide power supply voltage: 1.65-1.95V for SST25WF512/010/020/040
T1.0 25016
?2011 Silicon Storage Technology, Inc.
4
DS25016A
06/11
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