ST10R272LT1/TR STMicroelectronics, ST10R272LT1/TR Datasheet - Page 50

• Manufacturer Part Number: ST10R272LT1/TR
• Description: MCU 16BIT ROMLESS LV 100-TQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10R272LT1/TR

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, SSP, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 77
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 100-TQFP, 100-VQFP
• Processor Series: ST10R2x
• Core: ST10
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: SSP, USART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 77
• Number Of Timers: 5
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

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