Vdd; Vss; Vpp ( Μ Pd78E9860A, 78E9861A Only); Ic (Mask Rom Version Only) - NEC PD789860 User Manual

3.2.7 V
DD
This pin supplies positive power.
3.2.8 V
SS
This pin is the ground potential pin.
µ
3.2.9 V ( PD78E9860A, 78E9861A only)
PP
A high voltage should be applied to this pin when the EEPROM programming mode is set and when the program
is written or verified.
Perform either of the following pin handling.
• Individually connect a 10 kΩ pull-down resistor.
• Connect to a dedicate flash programmer in the programming mode and directly to V
mode by using a jumper on the board.
If the wiring length between the V
your program may not be executed correctly.

3.2.10 IC (mask ROM version only)

The IC (Internally Connected) pin is used to set the
normal operation mode, directly connect this pin to the V
If a potential difference is generated between the IC pin and the V
pins or an external noise superimposed on the IC pin, the user program may not run correctly.
CHAPTER 3 PIN FUNCTIONS
and V pins is too long or if external noise is superimposed on the V
PP SS
µ
PD789860 and 789861 to test mode before shipment. In
pin with as short a wiring length as possible.
SS
• Directly connect the IC pin to the V
V IC
SS
User's Manual U14826EJ5V0UD
in the normal operation
SS
pin due to a long wiring length between these
SS
pin.
SS
Keep short
pin,
PP
37