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26.6.4 RESET pin
If the reset signal of the dedicated flash programmer is connected to the RESET pin that is connected to the reset
signal generator on the board, signal collision takes place. To prevent this collision, isolate the connection with the
reset signal generator.
If the reset signal is input from the user system while the flash memory programming mode is set, the flash
memory will not be correctly programmed. Do not input any signal other than the reset signal of the dedicated flash
programmer.
78K0/KE1+
RESET
26.6.5 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
26.6.6 Other signal pins
Connect X1 and X2 in the same status as in the normal operation mode when using the on-board clock.
To input the operating clock from the programmer, however, connect the clock out of the programmer to X1, and its
inverse signal to X2.
26.6.7 Power supply
To use the supply voltage output of the flash programmer, connect the V
the V
pin to V
of the flash programmer.
SS
SS
To use the on-board supply voltage, connect in compliance with the normal operation mode.
However, be sure to connect the V
the voltage is monitored by the flash programmer.
Supply the same other power supplies (EV
442
CHAPTER 26 FLASH MEMORY
Figure 26-14. Signal Collision (RESET Pin)
Signal collision
Reset signal generator
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.
and V
pins to V
DD
SS
, EV
, AV
DD
SS
User's Manual U16899EJ2V0UD
Dedicated flash programmer
connection signal
Output pin
or V
via a resistor.
DD
SS
pin to V
DD
and GND of the flash programmer, respectively, because
DD
, and AV
) as those in the normal operation mode.
REF
SS
of the flash programmer, and
DD
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