mb90f378 Fujitsu Microelectronics, Inc., mb90f378 Datasheet - Page 17

• Manufacturer Part Number: mb90f378
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

7. Power supply pins
8. Analog power-on sequence of A/D converter and D/A converter
When a device has two or more V
the device in order to prevent a latch-up or other malfunction. To reduce extraneous emission, to prevent a
malfunction of the strobe signal due to an increase in the group level, and to maintain the local output current
rating, connect all these power supply pins to an external power supply and ground them.
The current source should be connected to the V
recommended that a bypass capacitor of about 0.1 µF be connected near the terminals between V
The power to the A/D converter and D/A converter (AV
on after the power to the digital circuits (V
digital circuits (V
power is turned on or off, AVR should not exceed AV
used as an input port, the input voltage should not exceed AV
to the digital circuits can be simultaneously turned on or off.)
CC
) after turning off the power to the A/D converter, D/A converter and analog inputs. When the
CC
or V
SS
CC
pins, the pins that should have equal potential are connected within
) is turned on. When turning off the power, turn off the power to the
CC
CC
and V
CC
. Also, when a pin that is used for A/D analog input is also
, AVR) and analog inputs (AN0 to AN11) must be turned
SS
CC
pins of the device with minimum impedance. It is
. (The power to the analog circuits and the power
MB90378 Series
CC
and V
SS
.
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