Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User’s Manual
Chapter 3 Reset Function
FEUL620Q504 3–5
[Note]
In system reset mode, the contents of data memory and those of any SFR whose initial value is undefined are not
initialized and are undefined. Initialize them by software.
In system reset mode by the BRK instruction, no special function register (SFR) that has a fixed initial value is
initialized either. Therefore initialize such an SFR by software.
The cause that shifted to System reset mode and the internal status of LSI are as below.
Initialize item
／
cause
RESET_N POR WDT VLS LLD BRK
instructon
SFR
O O O O O X
CPU
O O O O O O
Data memory
X X X X X X
VLS enable *1
O O O X O O
LLD enable *1
O O O O X O
*1 VLS enable, LLD enable : enable/disable each fucntion.
Initially, each items are set as disable. When reset occor by each causes, keep a status before reset occur.