Port Pins; Power Supply - NEC 78K0S/KA1+ User Manual

78K0S/KA1+
RESET

18.6.3 Port pins

When the flash memory programming mode is set, all the pins not used for flash memory programming enter the
same status as that immediately after reset. If external devices connected to the ports do not recognize the port
status immediately after reset, the port pin must be connected to V
The state of the pins in the self programming mode is the same as that in the HALT mode.

18.6.4 Power supply

Connect the V pin to V
DD
Supply AV with the same power supply as that in the normal operation mode.
REF
270
CHAPTER 18 FLASH MEMORY
Figure 18-8. Signal Collision (RESET Pin)
Signal collision
In the flash memory programming mode, the signal output by the reset
signal generator collides with the signal output by the dedicated flash
programmer. Therefore, isolate the signal of the reset signal generator.
of the flash programmer, and the V
DD
User's Manual U16898EJ3V0UD
Dedicated flash programmer
connection signal
Reset signal generator
Output pin
or V via a resistor.
DD SS
pin to V of the flash programmer.
SS SS