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18.5.3 RESET pin
When connecting the reset signals of the dedicated flash programmer to the RESET pin that is connected to the
reset signal generator on-board, conflict of signals occurs. To avoid the conflict of signals, isolate the connection to
the reset signal generator.
When a reset signal is input from the user system in the flash memory programming mode, the programming
operation will not be performed correctly. Therefore, do not input signals other than the reset signals from the
dedicated flash programmer.
V850/SB1, V850/SB2
RESET
18.5.4 Port pins (including NMI)
When the flash memory programming mode is set, all the port pins except the pins that communicate with the
dedicated flash programmer enter the output high-impedance status. If problems such as disabling output high-
impedance status should occur in the external devices connected to the port, connect them to V
resistors.
18.5.5 Other signal pins
Connect X1, X2, XT2, and AV
18.5.6 Power supply
Supply the power supply as follows:
V
= EV
DD
DD
Supply the power supply (AV
CHAPTER 18
FLASH MEMORY
Figure 18-8. Conflict of Signals (RESET Pin)
Conflict of signals
In the flash memory programming mode, the
signal the reset signal generator outputs conflicts
with the signal the dedicated flash programmer
outputs. Therefore, isolate the signals on the
reset signal generator side.
to the same status as that in the normal operation mode.
REF
, AV
, BV
, BV
) the same as when in normal operation mode.
DD
SS
DD
SS
User's Manual U13850EJ4V0UM
Dedicated flash programmer connection pin
Reset signal generator
Output pin
or V
via
DD
SS
431
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