MB90F482BPMC datasheet(85/124 Pages) FUJITSU

85 / 124 page

MB90480B/485B Series

DS07-13722-11E

(Continued)

• Note that when the microcontroller drive current is low, such as in the power saving modes, the + B input

potential may pass through the protective diode and increase the potential at the VCC pin, and this may affect

other devices.

• Note that if a + B signal is input when the microcontroller power supply is off (not fixed at 0 V) , the power

supply is provided from the pins, so that incomplete operation may result.

• Note that if the + B input is applied during power-on, the power supply is provided from the pins and the

resulting supply voltage may not be sufficient to operate the power-on reset.

• Care must be taken not to leave the + B input pin open.

• Note that analog system input/output pins other than the A/D input pins (LCD drive pins, comparator input

pins, etc.) cannot accept

+ B signal input.

• Sample recommended circuits:

*8 : MB90485B series only

P20 to P27, P30 to P37, P40 to P47, P70 to P77 pins can be used as 5 V I/F pin on applied 5 V to VCC5 pin.

P76 and P77 is N-ch open drain pin.

*9 : As for P76 and P77 (N-ch open drain pin) , even if using at 3 V simplicity (VCC3

= VCC5) , the ratings are applied.

WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,

temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.

P-ch

N-ch

VCC

Protective diode

Limiting

resistance

+ B input (0 V to 16 V)

• Input/Output Equivalent circuits

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