12 ic, 13 vdd, 14 vss – NEC PD754144 User Manual
Page 29
CHAPTER 2 PIN FUNCTIONS
29
User’s Manual U10676EJ3V0UM
2.2.12 IC
The IC (Internally Connected) pin sets the test mode in which the
µPD754244 is tested before shipment. Usually,
you should directly connect the IC pin to the V
DD
pin with as short a wiring length as possible.
If a voltage difference is generated between the IC and V
DD
pins because the wiring length is too long, or because
external noise is superimposed on the IC pin, your program may not be correctly executed.
• Directly connect the IC pin to the V
DD
pin.
V
DD
V
DD
IC
Keep as short
as possible.
2.2.13 V
DD
Positive power supply pin.
2.2.14 V
SS
GND.
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