SST25WF040B Datasheet, PDF (4/39 Pages) Microchip Technology – 4 Mbit 1.8V SPI Serial Flash

SST25WF040B
2.0 PIN DESCRIPTION
FIGURE 2-1:
PIN ASSIGNMENTS
CE#
SO/SIO1
WP#
VSS
1
8
VDD
2
7
HOLD#
3
6
SCK
4
5
SI/SIO0
8-Lead SOIC
200051 3 08-soic-P0.0
CE# ₁
SO/SIO1 ₂
WP# ₃
VSS 4
Top View
8
VDD
7 ^HOLD#
6 ^SCK
5
SI/SIO0
20005193 08-uson Q3A P1.0
8-Contact USON
TABLE 2-1:
Symbol
SCK
SI
SO
SIO_[0:1]
CE#
WP#
HOLD#
V_DD
V_SS
PIN DESCRIPTION
Pin Name
Functions
Serial Clock
To provide the input/output 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.
Serial Data Input To transfer commands, addresses, or data serially into the device.
Inputs are latched on the rising edge of the serial clock.
Serial Data Output To transfer data serially out of the device.
Data is shifted out on the falling edge of the serial clock.
Serial Data Input/
Output for Dual I/O
Mode
To transfer commands, addresses, or data serially into the device, or data out of
the device. Inputs are latched on the rising edge of the serial clock. Data is
shifted out on the falling edge of the serial clock. These pins are used in Dual
I/O mode
Chip Enable
The device is enabled by a high to low transition on CE#. CE# must remain low
for the duration of any command sequence. The device is deselected and
placed in Standby mode when CE# is high.
Write Protect
The Write Protect (WP#) pin is used to enable/disable BPL bit in the status reg-
ister.
Hold
To temporarily stop serial communication with SPI Flash memory while device
is selected.
Power Supply
To provide power supply voltage: 1.65-1.95V for SST25WF040B
Ground
DS20005193C-page 4
 2014 Microchip Technology Inc.