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●
Using external clock
To use external clock, drive the X0 pin and leave X1 pin open.
Figure 1.10-1 is a diagram of how to use external clock.
●
Power supply input pins (V
• If there are multiple V
potential are connected the inside of the device to prevent such malfunctioning as latch-up.
To reduce unnecessary radiation, prevent malfunctioning of the strobe signal due to the rise of ground
level, and keep the total output current standard, be sure to connect the V
supply and ground externally.
• Connect V
CC
• To prevent power supply noise, connect a capacitor of about 0.1 μF as a bypass capacitor between V
and V
in the vicinity of V
SS
Figure 1.10-2 Power Supply input Pins (V
●
Pull-up/pull-down resistors
The MB90390 Series does not support internal pull-up/pull-down resistors option. Use external components
where needed.
Figure 1.10-1 Using External Clock
/V
)
CC
SS
and V
pins, from the point of view of device design, pins to be of the same
CC
SS
and V
to the device from the power supply source with lowest possible impedance.
SS
and VSS pins of the device.
CC
Vcc
Vss
MB90390
Vcc
Series
Vss
MB90390 Series
MB90590 Series
X0
Open
X1
/V
CC
Vss
Vcc
Vss
Vcc
CHAPTER 1 OVERVIEW
and V
pins to the power
CC
SS
)
SS
Vcc
Vss
CC
23
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