upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 396

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

23.5.3 RESET pin
signal generator on the board, signal collision takes place. To prevent this collision, isolate the connection with the
reset signal generator.
memory will not be correctly programmed. Do not input any signal other than the reset signal of the dedicated flash
programmer.
23.5.4 Port pins
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
23.5.5 Other signal pins
inverse signal to X2.
23.5.6 Power supply
the V
GND of the flash programmer.
396
If the reset signal of the dedicated flash programmer is connected to the RESET pin that is connected to the reset
If the reset signal is input from the user system while the flash memory programming mode is set, the flash
When the flash memory programming mode is set, all the pins not used for flash memory programming enter the
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
To use the power supply output of the flash programmer, connect the V
However, the flash programmer is used to monitor voltage, be sure to connect the V
To use the on-board power supply, connect in compliance with the normal operation mode.
Supply the same other power supplies (EV
SS
pin to V
SS
of the flash programmer.
µ
PD78F0114
RESET
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.
Figure 23-16. Signal Collision (RESET Pin)
Signal collision
DD
CHAPTER 23
User’s Manual U16227EJ3V0UD
, EV
SS
, AV
Reset signal generator
REF
Dedicated flash programmer
connection pin
, and AV
PD78F0114
Output pin
DD
or V
SS
) as those in the normal operation mode.
SS
DD
via a resistor.
pin to V
DD
of the flash programmer, and
DD
and V
SS
pins to V
DD
and