Dell E2009W Service Manual - Page 19

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Dell E2009W Service Manual
8.1 U108 (Serial Flash)
Pin
Symbol
1
CE#
2
SO
3
WP#
4
VSS
5
SI
6
SCK
7
HOLD
8
VDD
I/O
I
The device is enabled by a high to low transition on CE#. CE#
must remain low for the duration of any command sequence.
I/O
To transfer commands, addresses, or data serially into the device.
I/O
The write protect (WP#) pin is used to enable/disable BPL bit in
the status register.
G
Connect ground
I/O
To transfer commands, addresses, or data serially into the device
input are latched on the rising edge of the serial clock.
I/O
To provide the timing of 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.
I/O
To temporarily stop serial communication with SPI flash
memory without resetting the device.
P
To provide power supply.
Description
18
Service Manual