ST72325R6-AUTO STMicroelectronics, ST72325R6-AUTO Datasheet - Page 206

• Manufacturer Part Number: ST72325R6-AUTO
• Description: 8-bit Mcu For Automotive With 16 To 60 Kbyte Flash, Adc, Css, 5 Timers, Spi, Sci, I2c Interface
• Manufacturer: STMicroelectronics

Electrical characteristics
19.5.6
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PLL characteristics
Table 120. PLL characteristics
1. Data characterized but not tested
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 79
4 MHz. At frequencies of less than 125 kHz, the jitter is negligible.
Figure 79. Integrated PLL jitter versus signal frequency
1. Measurement conditions: f
Memory characteristics
RAM and hardware registers
Table 121. RAM supply voltage
1. Minimum V
Symbol
∆ f
hardware registers (only in Halt mode). Not tested in production.
V
Symbol
RM
CPU
f
OSC
/f
CPU
shows the PLL jitter integrated on application signals in the range 125 kHz to
Data retention mode
DD
supply voltage without losing data stored in RAM (in Halt mode or under RESET) or in
PLL input frequency range
Instantaneous PLL jitter
Parameter
+/-Jitter (%)
CPU
1.2
0.8
0.6
0.4
0.2
1
0
Parameter
= 8 MHz
4 MHz
(1)
2 MHz
(1)
Halt mode (or RESET)
Application Frequency
1 MHz 500 kHz 250 kHz 125 kHz
Conditions
f
OSC
Conditions
= 4 MHz
(1)
Max
Typ
Min
1.6
Min
2
Typ
ST72325xxx-Auto
Typ
0.7
Max
Max
4
2
Unit
Unit
MHz
%
V