ST10R172LT1 STMicroelectronics, ST10R172LT1 Datasheet - Page 41

• Manufacturer Part Number: ST10R172LT1
• Description: MCU 16BIT ROMLESS LV 100TQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10R172LT1

• 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
• Controller Family/series: ST10
• No. Of I/o's: 77
• Ram Memory Size: 1KB
• Cpu Speed: 50MHz
• No. Of Timers: 5
• Embedded Interface Type: SPI, USART
• No. Of Pwm Channels: 1
• Rohs Compliant: Yes
• Processor Series: ST10R1x
• 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
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: In Transition

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.
4
3
2
1
Max.jitter [% ]
2
4
3TCL
Figure 12 Approximated maximum PLL jitter
min
This formula is valid for 1<N<40 and 10<f
8
=
=
3TCL
3TCL
NOM
NOM
D
3
ST10R172L - ELECTRICAL CHARACTERISTICS
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
41/68
1