MC80F0424 Datasheet, PDF (116/135 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC80F0424/0432/0448
Preliminary
RESET VECTOR
PFDS =1
YES
NO
RAM Clear
Initialize RAM Data
Initialize All Ports
Initialize Registers
PFDS = 0
Skip the
initial routine
Function
Execution
Figure 24-2 Example S/W of Reset flow by Power fail
When PFDM = 1
V_DD
Internal
RESET
V_DD
Internal
RESET
V_DD
Internal
RESET
65.5mS
t <65.5mS
65.5mS
65.5mS
Figure 24-3 Power Fail Processor Situations (at 4MHz operation)
V_PFDMAX
V_PFDMIN
V_PFDMAX
V_PFDMIN
V_PFDMAX
V_PFDMIN
112
MAR. 2005 Ver 0.2