MB90598GPF datasheet(13/56 Pages) FUJITSU

13 / 56 page

MB90595G Series

DS07-13705-7E

(5) Pull-up/down resistors

The MB90595G Series does not support internal pull-up/down resistors. Use external components where needed.

(6) Crystal Oscillator Circuit

Noises around X0 or X1 pins may cause 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

that lines of oscillation circuit not cross the lines of other circuits.

A printed circuit board artwork surrounding the X0 and X1 pins with ground area for stabilizing the operation is

highly recommended.

(7) 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, 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 does not exceed AVRH or AVCC (turning on/off the analog and digital power supplies simulta-

neously is acceptable).

(8) Connection of Unused Pins of A/D Converter

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

(9) N.C. Pin

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

(10) Notes on Energization

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

µs or more (0.2 V to 2.7 V).

(11) Indeterminate outputs from ports 0 and 1 (MB90V595G only)

During oscillation setting time of step-down circuit (during a power-on reset) after the power is turned on, the

outputs from ports 0 and 1 become following state.

• If RST pin is “H”, the outputs become indeterminate.

• If RST pin is “L”, the outputs become high-impedance.

Pay attention to the port output timing shown as follows.

Oscillation setting time∗2

Power-on reset∗1

Vcc (Power-supply pin)

PONR (power-on reset) signal

RST (external asynchronous reset) signal

RST (internal reset) signal

Oscillation clock signal

KA (internal operation clock A) signal

KB (internal operation clock B) signal

PORT (port output) signal

Period of indeterminated

*1:Power-on reset time: Period of “clock frequency

× 217” (Clock frequency of 16 MHz: 8.19 ms)

*2:Oscillation setting time: Period of “clock frequency

× 218” (Clock frequency of 16 MHz: 16.38ms)

RST pin is “H”

MB90598GPF Datasheet(PDF) 13 Page - fujitsu semiconductor

MB90598GPF Datasheet(HTML) 13 Page - fujitsu semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

Datasheet Download

Link URL