upd78f0103hmca1-5a4-a Renesas Electronics Corporation., upd78f0103hmca1-5a4-a Datasheet - Page 344

• Manufacturer Part Number: upd78f0103hmca1-5a4-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

21.5.4 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.
21.5.5 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
21.5.6 Other signal pins
and its inverse signal to X2[CL2].
21.5.7 Power supply
the V
the power is monitored by the flash programmer.
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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 supply voltage output of the flash programmer, connect the V
To use the on-board supply voltage, connect in compliance with the normal operation mode.
However, be sure to connect the V
Supply the same other power supplies (AV
SS
pin to V
SS
of the flash programmer.
78K0/KB1+
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 21-13. Signal Collision (RESET Pin)
DD
Signal collision
and V
CHAPTER 21 FLASH MEMORY
REF
User’s Manual U16846EJ3V0UD
SS
pins to V
and AV
Reset signal generator
SS
DD
Dedicated flash programmer
connection signal
) as those in the normal operation mode.
and GND of the flash programmer, respectively, because
Output pin
DD
or V
SS
DD
via a resistor.
pin to V
DD
of the flash programmer, and