upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 760

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

21.6.4 RESET pin
When the reset signal of the dedicated flash programmer is connected to the RESET pin connected to
a reset signal generator on board, a signal conflict occurs. To avoid this signal conflict, isolate the con-
nection with the reset signal generator.
If a reset signal is input from the user system in flash memory programming mode, the programming
operation is not performed correctly. Do not input a reset signal other than that from the dedicated flash
programmer.
21.6.5 Port pins (including NMI)
All the port pins, including the pin connected to the dedicated flash programmer, go into an output high-
impedance state in the flash memory programming mode. If there is a problem such as that the external
device connected to a port prohibits the output high-impedance state, connect the port to VDD or VSS
via a resistor.
21.6.6 Other signal pins
Connect X1, and X2 pins in the same status as in the normal operation mode.
21.6.7 Power supply
Supply the same power to the supply power pins (V
as in the normal operation mode.
760
RESET
Figure 21-10: Signal Conflict (RESET Pin)
User’s Manual U16702EE3V2UD00
Chapter 21 Flash Memory
Conflict of signals
DD0
, V
Reset signal generator
Dedicated flash programmer
connection pin
DD1
Output pin
, V
SS0
, V
SS1,
BV
DD
, BV
SS
, AV
SS
, AV
REF0
)