STN1110 View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'STN1110' PDF : 22 Pages View PDF
5.5 Device Reset Pin
R¯E¯¯S¯E¯T pin must be logic high for STN1110 to run. If
this pin is not controlled by the host controller, it must
be connected to VDD.
It is recommended to pull up R¯E¯¯S¯E¯T pin to VDD via a
10 kΩ resistor.
5.6 Oscillator Pins
The oscillator circuit should be placed on the same
side of the board as the device. Also, place the
oscillator circuit close to the oscillator pins, not
exceeding one-half inch (12 mm) distance between
them. The load capacitors should be placed next to
the oscillator itself, on the same side of the board.
Use a grounded copper pour around the oscillator
circuit to isolate them from surrounding circuits. The
grounded copper pour should be routed directly to
the STN1110 ground. Do not run any signal traces or
power traces inside the ground pour. Also, if using a
two-sided board, avoid any traces on the other side
of the board where the crystal is placed. A suggested
layout is shown in Figure 1.
Figure 1 – Suggested Placement of the Oscillator
Circuit
STN1110
5.7 NVM Reset Input
¯R¯S¯T¯_¯N¯V¯M¯ pin must be pulled up to VDD via a 10 kΩ
resistor for proper device operation.
If O¯B¯¯D¯_¯T¯X¯_¯L¯E¯D / R¯S¯T¯_¯N¯V¯¯M pin is used to directly
drive an LED, the pull-up is unnecessary.
5.8 Open Drain Outputs
All open drain outputs (as specified in section 4.1)
that are in use must be pulled up to VDD or +5V.
Specifically, UART_TX pin must be pulled up in order
to be able to communicate with the device.
See section 4.2 “Detailed Pin Descriptions” for more
information.
Oscillator
Guard Ring
STN1110DSA
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