Chapter 21 Reset Function; Features; Configuration - NEC V850E/PH2 User Manual

21.1 Features

• Reset function by RESET input
• Forced reset function by DCU (refer to Chapter 23 "On-Chip Debug Function (OCD)" on
page 977)
• Reset generator (RG) eliminates noise from the RESET pin.

21.2 Configuration

During a system reset, most pins (all except the DCK, DRST, DMS, DDI, DDO, RESET, X2, V
V , V to V
DD15 SS10 SS15
and AV pins) enter the high-impedance state.
SS1
Therefore, if an external device always requires a defined input level (e.g. external memory) a pull-up
(or pull-down) resistor must be connected to each concerned output pin to prevent signal lines from
floating. If no resistor is connected, the external device may be destroyed when these pins enter the
high-impedance state.

Chapter 21 Reset Function

, V to V , V
DD30 DD37 SS30
User's Manual U16580EE3V1UD00
to V , CV , CV
SS37 DD SS
, AV , AV , AV
DD REF0 REF1
to
DD10
, AV
SS0
971