upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 394

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

23.5.4 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.
23.5.5 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
23.5.6 Other signal pins
and its inverse signal to X2[CL2].
23.5.7 Power supply
the V
the power is monitored by the flash programmer.
394
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[CL1] and X2[CL2] 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[CL1],
To use the power supply output of the flash programmer, 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
However, be sure to connect the V
Supply the same other power supplies (EV
SS
pin to V
SS
of the flash programmer.
78K0/KC1+
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 23-13. Signal Collision (RESET Pin)
DD
Signal collision
and V
CHAPTER 23 FLASH MEMORY
DD
DD
User’s Manual U16961EJ4V0UD
SS
, EV
, EV
pins to V
SS
SS
, AV
, AV
Reset signal generator
DD
Dedicated flash programmer
connection pin
REF
REF
and GND of the flash programmer, respectively, because
, and AV
, and AV
Output pin
DD
or V
SS
SS
) as those in the normal operation mode.
) as those in the normal operation mode.
SS
DD
via a resistor.
pin to V
DD
of the flash programmer, and