ST72321AR6-Auto STMicroelectronics, ST72321AR6-Auto Datasheet - Page 198

• Manufacturer Part Number: ST72321AR6-Auto
• Description: 8-bit MCU for automotive with 32 Kbyte Flash, 10-bit ADC, timers, SPI, SCI and I2C interfaces
• Manufacturer: STMicroelectronics

Specifications of ST72321AR6-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

Electrical characteristics
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PLL characteristics
Table 119. PLL characteristics
1. Data based on characterization results
The user must take the PLL jitter into account in the application (for example, in serial
communication or sampling of high frequency signals). The PLL jitter is a periodic effect,
which is integrated over several CPU cycles. Therefore, the longer the period of the
application signal, the less it is impacted by the PLL jitter.
Figure 81
4 MHz. At frequencies of less than 125 kHz, the jitter is negligible.
Figure 81. Integrated PLL jitter versus signal frequency
1. Measurement conditions: f
 f
Symbol
CPU
f
OSC
/f
CPU
shows the PLL jitter integrated on application signals in the range 125 kHz to
PLL input frequency range
Instantaneous PLL jitter
+/-Jitter (%)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
CPU
Parameter
= 8 MHz
4 MHz
Doc ID 13829 Rev 1
2 MHz
(1)
Application Frequency
1 MHz
f
f
OSC
OSC
Conditions
= 4 MHz
= 2 MHz
500 kHz
(1)
250 kHz
Min
2
Typ
1.0
2.5
ST72321xx-Auto
Max
2.5
4.0
4
MHz
Unit
%