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CHAPTER 17 FLASH MEMORY (
µµµµ
PD70F3089Y)
User’s Manual U15109EJ3V0UD
503
17.5.3 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, programming
operations will not be performed correctly. Therefore, do not input signals other than the reset signals from the
dedicated flash programmer.
Figure 17-9. Conflict of Signals (RESET Pin)
RESET
V850/SC1, V850/SC2,
V850/SC3
Reset signal generator
Output 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.
Dedicated flash programmer connection pin
17.5.4 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 become output high-impedance status. If problems such as disabling output high-
impedance status should occur to the external devices connected to the port, connect them to V
DD0
, V
DD1
, PORTV
DD0
to PORTV
DD2
, ADCV
DD
, GND0 to GND2, PORTGND0, PORTGND1, or ADCGND via resistors.
17.5.5 Other signal pins
Connect X1, X2, XT1, and XT2 in the same status as that in the normal operating mode.
17.5.6 Power supply
Supply the power supply as follows:
V
DD0
= PORTV
DD1
Supply the power (V
DD1
, PORTV
DD0
, PORTV
DD2
, ADCV
DD
, ADCGND, GND0 to GND2, PORTGND0, and
PORTGND1) the same as when in normal operating mode.