MB91F577CSPMC datasheet(106/163 Pages) CYPRESS

106 / 163 page

Document Number: 002-04725 Rev.*A

Page 106 of 163

MB91570 Series

*8:

• Corresponding pins: all general-purpose ports. (Except P010 to P017, P020 to P027, P030 to P037, P040 to P047, P050 to

P053, P90/ADTG/PPG0_2)

• Use within recommended operating conditions.

• Use at DC voltage (current).

• The + B signal should always be applied by connecting a limiting resistor between the + B signal and the microcontroller.

• The value of the limiting resistor should be set so that the current input to the microcontroller pin does not exceed rated values

at any time regardless of instantaneously or constantly when the + B signal is input.

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

can increase the potential at the VCC pin via a protective diode, possibly affecting other devices.

• Note that if the + B signal is input when the microcontroller is off (not fixed at 0 V), since the power is supplied through the pin,

the microcontroller may operate incompletely.

• Note that if the +B signal is input at power-on, since the power is supplied through the pin, the power-on reset may not function

in the power supply voltage.

• Do not leave + B input pins open.

Sample recommended circuit

MB91570 series

+Binput (12 to 16V)

Protective diode

Limiting resistor current

WARNING:

Semiconductor devices may be permanently damaged by application of stress (including, without limitation, voltage, current or

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

MB91F577CSPMC Datasheet(PDF) 106 Page - Cypress Semiconductor