Reset Pin; Port Pins (Including Nmi); Other Signal Pins; Power Supply - NEC Renesas V850/SC1 User Manual

32-bit single-chip microcontrollers

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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.

V850/SC1, V850/SC2,

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

, GND0 to GND2, PORTGND0, PORTGND1, or ADCGND via resistors.

Connect X1, X2, XT1, and XT2 in the same status as that in the normal operating mode.

Supply the power supply as follows:

Supply the power (V

PORTGND1) the same as when in normal operating mode.

FLASH MEMORY ( µ µ µ µ PD70F3089Y)

Figure 17-9. 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.

User's Manual U15109EJ3V0UD

Dedicated flash programmer connection pin

Reset signal generator

, ADCGND, GND0 to GND2, PORTGND0, and

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