ViewSonic VX2262WM Service Manual - Page 22

Circuit Diagram, Symbol, Pin Name, Functions

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Symbol Pin Name SCK Serial Clock Serial Data SI 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 CE# WP# HOLD# VDD Serial Data Output Chip Enable Write Protect Hold Power Supply 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(3.0-3.6V) VSS Ground Circuit Diagram ViewSonic Corporation - 22 - Confidential - Do Not Cop VX2262wm/wmp

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- 22 –
ViewSonic Corporation
Confidential - Do Not Cop
VX2262wm/wmp
Circuit Diagram
Symbol
Pin Name
Functions
SCK
Serial Clock
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.
SI
Serial Data
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.
CE#
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.
WP#
Write Protect
The Write Protect (WP#) pin is used to enable/disable BPL
bit in the status register.
HOLD#
Hold
To temporarily stop serial communication with SPI flash
memory without resetting the device.
V
DD
Power Supply
To provide power supply(3.0-3.6V)
V
SS
Ground