Datasheet

ST72334J/N, ST72314J/N, ST72124J
26/153
9 SUPPLY, RESET AND CLOCK MANAGEMENT
The ST72334J/N, ST72314J/N and ST72124J mi-
crocontrollers include a range of utility features for
securing the application in critical situations (for
example in case of a power brown-out), and re-
ducing the number of external components. An
overview is shown in Figure 12.
See Section 16 "ELECTRICAL CHARACTERIS-
TICS" on page 107 for more details.
Main Features
■ Supply Manager with main supply low voltage
detection (LVD)
■ Reset Sequence Manager (RSM)
■ Multi-Oscillator (MO)
– 4 Crystal/Ceramic resonator oscillators
– 1 External RC oscillator
– 1 Internal RC oscillator
■ Clock Security System (CSS)
–Clock Filter
– Backup Safe Oscillator
Figure 12. Clock, Reset and Supply Block Diagram
IE D00 0 0 RF RF
CRSR
CSS WDG
f
OSC
CSS INTERRUPT
LVD
LOW VOLTAGE
DETECTOR
(LVD)
MULTI-
OSCILLATOR
(MO)
FROM
WATCHDOG
PERIPHERAL
OSC1
RESET
VDD
VSS
RESET SEQUENCE
MANAGER
(RSM)
CLOCK
FILTER
SAFE
OSC
CLOCK SECURITY SYSTEM
(CSS)
OSC2
TO
MAIN CLOCK
CONTROLLER