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ViewSonic Corporation
Confidential - Do Not Cop VA1721wmb
Pin Diagram:
PIN Descriptions:
Symbol Type Description
CE# INPUT
Chip Enable: CE# goes low activates the device’s internal
circuitries for device operation. CE# goes high deselects the
device and switches into standby mode to reduce the power
consumption. When the device is not selected, data will not
be accepted via the serial input pin (SI), and the serial
output pin (SO) will remain in a high impedance state.
SO OUTPUT Serial Data Output
WP# INPUT
Write Protect A hardware program/erase protection for all or
partial of memory array. When the WP# pin is pulled t low,
whole or partial of memory array is write protected depends
on the setting of BP2, BP1 and BP0 bits in the Status
Register, When the WP# is pulled high, the devices are not
write protected.
GND Ground
Vcc Device Power Supply
HOLD# INPUT
Hold: Pause serial communication with the master device
without resetting the serial sequence.
SCK INPUT Serial Data Clock
SI INPUT Serial Data Input
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