mb95r203a Fujitsu Microelectronics, Inc., mb95r203a Datasheet - Page 11

• Manufacturer Part Number: mb95r203a
• Description: 8-bit Proprietary Microcontrollers
• Manufacturer: Fujitsu Microelectronics, Inc.

■ PIN CONNECTION
• Treatment of Unused Input Pin
• Power Supply Pins
• DBG Pin
• RST Pin
DS07-12630-1E
• Example of DBG / RST connection diagram
Leaving unused input pins unconnected can cause abnormal operation or latch-up, leaving to permanent dam-
age. Unused input pins should always be pulled up or down through resistance of at least 2 kΩ. Any unused
input/output pins may be set to output mode and left open, or set to input mode and treated the same as unused
input pins. If there is unused output pin, make it to open.
In products with multiple V
to avoid abnormal operations including latch-up. However, you must connect the pins to external power supply
and a ground line to lower the electro-magnetic emission level, to prevent abnormal operation of strobe signals
caused by the rise in the ground level, and to conform to the total output current rating.
Moreover, connect the current supply source with the V
is also advisable to connect a ceramic bypass capacitor of approximately 0.1 μF between V
device.
Connect the DBG pin directly to external Pull-up.
To prevent the device unintentionally entering test mode due to noise, lay out the printed circuit board so as to
minimize the distance from the DBG pin to V
The DBG pin should not stay at “L” level after power-on until the reset output is released.
Connect the RST pin directly to Pull-up.
To prevent the device unintentionally entering test mode due to noise, lay out the printed circuit board so as to
minimize the distance from the RST pin to V
The RST/PF2 pin functions as the reset input/output pin after power-on. In addition, the reset output can be
enabled by the RSTOE bit of the SYSC register, and the reset input function or the general purpose I/O function
can be selected by the RSTEN bit of the SYSC register.
CC
or V
SS
pins, the pins of the same potential are internally connected in the device
CC
CC
or V
or V
SS
SS
DBG
pins.
RST
pins.
CC
and V
SS
pins of this device at the low impedance. It
R
R
Pull-up resistor recommended
resistance
For DBG pin : R = 4.7 kΩ
For RST pin : R = 10 kΩ
MB95R203A
CC
and V
SS
near this
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