HMS87C13042A Datasheet, PDF (72/88 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

HMS87C130XA/120XA/110XA
RESET VECTOR
PFS =1
YES
NO
RAM CLEAR
INITIALIZE RAM DATA
INITIALIZE ALL PORTS
INITIALIZE REGISTERS
Skip the
initial routine
FUNTION
EXECUTION
Figure 19-2 Example S/W of RESET by Power fail
When PFDM = 1
V_DD
Internal
RESET
V_DD
Internal
RESET
V_DD
Internal
RESET
64mS
t < 64mS
64mS
64mS
V_DD
When PFDM = 0
System
Clock
V_DD
System
Clock
Figure 19-3 Power Fail Processor Situations
Apr. 2001 ver1.0
PFV_DDMAX
PFV_DDMIN
PFV_DDMAX
PFV_DDMIN
PFV_DDMAX
PFV_DDMIN
PFV_DDMAX
PFV_DDMIN
PFV_DDMAX
PFV_DDMIN
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