ST72324LK2 STMicroelectronics, ST72324LK2 Datasheet - Page 23

• Manufacturer Part Number: ST72324LK2
• Description: 3V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72324LK2

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt, Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• 16-bit Timer A With: 1 input capture, 1 output compare, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

6 SUPPLY, RESET AND CLOCK MANAGEMENT
The device includes 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
For more details, refer to dedicated parametric
section.
Main features
■
■
■
Figure 11. Clock, Reset and Supply Block Diagram
– 5 Crystal/Ceramic resonator oscillators
– 1 Internal RC oscillator
Optional PLL for multiplying the frequency by 2
(not to be used with internal RC oscillator)
Reset Sequence Manager (RSM)
Multi-Oscillator Clock Management (MO)
RESET
OSC2
OSC1
Figure
OSCILLATOR
RESET SEQUENCE
MULTI-
(MO)
MANAGER
(RSM)
11.
f
OSC
PLL Block
PLL x 2
/ 2
6.1 PHASE LOCKED LOOP
If the clock frequency input to the PLL is in the
range 2 to 4 MHz, the PLL can be used to multiply
the frequency by two to obtain an f
MHz. The PLL is enabled by option byte. If the PLL
is disabled, then f
Caution: The PLL is not recommended for appli-
cations where timing accuracy is required. See
Section 6.1 on page
Caution: The PLL must not be used with the inter-
nal RC oscillator.
PLL OPTION BIT
0
1
f
OSC2
OSC2 =
23.
CLOCK (MCC/RTC)
WITH REALTIME
CONTROLLER
TIMER (WDG)
MAIN CLOCK
WATCHDOG
f
OSC
/2.
ST72324Lxx
OSC2
of 4 to 8
f
CPU
23/154
1