Read Sharp LC-20B6E (serv.man10) Service Manual online
54
LC-20B6E
Pin 40, DVSS_ADC
− Digital ground pin for ADC
This pin has to be connected to digital ground.
Pin 41, XTAL_IN
− Crystal input pin
If an external clock is used this pin should be left open.
A crystal should be placed as close as possible to this
pin. External capacitors at each crystal pin to ground
are required. It should be verified by layout, that no
supply current is flowing through the ground connec-
tion point.
A crystal should be placed as close as possible to this
pin. External capacitors at each crystal pin to ground
are required. It should be verified by layout, that no
supply current is flowing through the ground connec-
tion point.
Pin 42, XTAL_OUT
− Crystal output pin
If an external clock is used, it has to be connected to
this pin. A crystal should be placed as close as possi-
ble to this pin. External capacitors at each crystal pin
to ground are required. It should be verified by layout,
that no supply current is flowing through the ground
connection point.
this pin. A crystal should be placed as close as possi-
ble to this pin. External capacitors at each crystal pin
to ground are required. It should be verified by layout,
that no supply current is flowing through the ground
connection point.
Pin 43, VREF
− Analog reference voltage
This pin must be connected to SGND via a circuitry
according to the application circuit.
according to the application circuit.
Pin 43, SGND
− Reference for analog ground
This pin must be connected separately to a single
ground point.
ground point.
7.4. Pin Descriptions (Continued)
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