ST7232AK2-Auto STMicroelectronics, ST7232AK2-Auto Datasheet - Page 36

• Manufacturer Part Number: ST7232AK2-Auto
• Description: 8-bit MCU for automotive, 16 Kbyte Flash, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMicroelectronics

Specifications of ST7232AK2-Auto

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators 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
• Two 16-bit Timers With: 2 input captures, 2 output compares, PWM and pulse generator modes

Supply, reset and clock management
6
6.1
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 reducing the number of external components. An overview is
shown in
6.2
●
●
●
6.3
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
disabled, then f
Caution:
Caution:
Figure 9.
36/201
Optional PLL for multiplying the frequency by 2
Reset sequence manager (RSM)
Multi-oscillator clock management (MO)
–
Figure
5 crystal/ceramic resonator oscillators
Introduction
Main features
Phase locked loop (PLL)
Supply, reset and clock management
The PLL is not recommended for applications where timing accuracy is required.
When the PLL is used with an external clock signal, the clock signal must be available on
the OSCIN pin before the reset signal is released.
PLL block diagram
OSC2 =
10.
f
OSC
/2.
OSC2
f
OSC
of 4 to 8 MHz. The PLL is enabled by option byte. If the PLL is
PLL x 2
/2
PLL option bit
0
1
f
OSC2
ST7232Axx-Auto