MB90583CAPF datasheet(20/110 Pages) FUJITSU

20 / 110 page

MB90580C Series

It is recommended to provide a bypass capacitor of around 0.1

µF between VCC and VSS pin near the device.

Crystal Oscillator Circuit

Noises around X0 or X1 pins may be possible causes of abnormal operations. Make sure to provide bypass

capacitors via shortest distance from X0, X1 pins, crystal oscillator (or ceramic resonator) and ground lines, and

make sure, to the utmost effort, that lines of oscillation circuit not cross the lines of other circuits.

It is highly recommended to provide a printed circuit board art work surrounding X0 and X1 pins with an grand

area for stabilizing the operation.

Turning-on Sequence of Power Supply to A/D Converter and Analog Inputs

Make sure to turn on the A/D converter power supply (AVCC, AVSS, AVRH, AVRL) and analog inputs (AN0 to AN7)

after turning-on the digital power supply (VCC).

Turn-off the digital power after turning off the A/D converter supply and analog inputs. In this case, make sure

that the voltage of AVRH dose not exceed AVCC (turning on/off the analog and digital power supplies simulta-

neously is acceptable).

Connection of Unused Pins of A/D Converter

Connect unused pin of A/D converter to AVCC = VCC, AVSS = AVRH = AVRL = VSS.

Connection of Unused Pins of D/A Converter

Connect unused pin of D/A converter to DVRH = VSS, DVSS = VSS.

10. N.C. Pin

The N.C. (internally connected) pin must be opened for use.

11. Notes on Energization

To prevent the internal regulator circuit from malfunctioning, set the voltage rise time during energization at 50

µs or more (0.2 V to 2.7 V).

12. Use of the sub-clock

Use the one clock system parts when the sub-clock is not used. Connected the oscillator under 32 kHz to the

both terminals XA0 and X1A for the two clocks system parts. Pull-down the terminal X0A and leave the terminal

X0A open for the one clock system parts.

VCC

VSS

MB90580C

Series

MB90583CAPF Datasheet(PDF) 20 Page - fujitsu semiconductor