CHAPTER 14 FLASH MEMORY (
µµµµ
PD70F3102, 70F3102A)
User’s Manual U12688EJ4V0UM00
417
14.5.3 RESET pin
When connecting the reset signals of the dedicated flash programmer to the RESET pin that is connected to the
reset signal generation circuit on-board, conflict of signals occurs. To avoid the conflict of signals, isolate the
connection to the reset signal generator.
When reset signal is input from the user system during the flash memory programming mode, programming
operation will not be performed correctly. Therefore, do not input signals other than the reset signals from the
dedicated flash programmer.
V850E/MS1
RESET
Output pin
Reset signal generator
Dedicated flash programmer connection pin
Conflict of signals
In the flash memory programming mode, the signal
the reset signal generation circuit outputs conflicts
with the signal the dedicated flash programmer
outputs. Therefore, isolate the signals on the reset
signal generator side.
14.5.4 NMI pin
Do not change the input signal to the NMI pin during the flash memory programming mode. If the NMI pin is
changed during the flash memory programming mode, the programming may not be performed correctly.
14.5.5 MODE0 to MODE2 pins
If MODE0 to MODE2 are set as follows and a write voltage (7.8 V) is applied to the MODE3/V
PP
pin and reset is
canceled, these pins change to the flash memory programming mode.
•
MODE0: Low-level input
•
MODE1: High-level input
•
MODE2: Low-level input
14.5.6 Port pin
When the flash memory programming mode is set, all the port pins except the pins which communicate with the
dedicated flash programmer become output high-impedance status. The treatment of these port pins is not
necessary. If problems such as disabling output high-impedance status should occur to the external devices
connected to the port, connect them to V
DD
or V
SS
through resistors.
14.5.7 WAIT pin
Input high- or low-level signals relative to HV
DD
to WAIT pin.
14.5.8 Other signal pins
Connect X1, X2, and AV
REF
to the same status as that in the normal operation mode.
Summary of Contents for V850E/MS1 UPD703100
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