ST10R272L STMicroelectronics, ST10R272L Datasheet - Page 50

• Manufacturer Part Number: ST10R272L
• Description: 16-BIT Romless MCU WITH MAC UNIT
• Manufacturer: STMicroelectronics

Specifications of ST10R272L

• Cpu Frequency: 0 to 50 MHz
• Power: 3.3 Volt +/-0.3V

ST10R272L - ELECTRICAL CHARACTERISTICS
where N = number of consecutive TCLs and 1
and
PLL jitter is an important factor for bus cycles using waitstates and for the operation of timers,
serial interfaces, etc. For slower operations and longer periods (e.g. pulse train generation or
measurement, lower baudrates, etc.) the deviation caused by the PLL jitter is negligible.
50/77
1
4
3
2
1
Max.jitter [% ]
2
4
3TCL
Figure 15 Approximated maximum PLL jitter
min
This formula is valid for 1<N<40 and 10<f
8
=
=
3TCL
3TCL
NOM
NOM
D
3
0,962 36.07nsec @fcpu=50MHz
=
=
1 3,8 100
16
–
4 3 15
3,8%
–
N
40. So for a period of 3 TCLs (i.e. N = 3):
cpu
<50
32
N