3

FN8222.3

July 20, 2009

Pin Descriptions

PIN

NUMBER

PIN NAME

DESCRIPTION

1INC

INCREMENT The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or

decrement the counter in the direction indicated by the logic level on the U/D input.

2U/D

UP/DOWN The U/D input controls the direction of the wiper movement and whether the counter is incremented or

decremented.

references the relative position of the terminal in relation to wiper movement direction selected by the U/D input and

not the voltage potential on the terminal.

position of the wiper within the array is determined by the control inputs. The wiper terminal series resistance is typically

40

Ω.

references the relative position of the terminal in relation to wiper movement direction selected by the U/D input and

not the voltage potential on the terminal.

7CS

CS The device is selected when the CS input is LOW. The current counter value is stored in non-volatile memory when

CS is returned HIGH while the INC input is also HIGH. After the store operation is complete the X9C102, X9C103,

X9C104, X9C503 device will be placed in the low power standby mode until the device is selected once again.

X9C102, X9C103, X9C104, X9C503