ST10F272M-4QR3 STMicroelectronics, ST10F272M-4QR3 Datasheet - Page 145

• Manufacturer Part Number: ST10F272M-4QR3
• Description: MCU 16BIT 256K FLASH 144-PQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F272M-4QR3

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: ASC, CAN, EBI/EMI, I²C, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 20K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-MQFP, 144-PQFP
• Processor Series: ST10F27x
• Core: ST10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

ST10F272M
24.8.8
Voltage controlled oscillator
The ST10F272M implements a PLL which combines different levels of frequency dividers
with a voltage controlled oscillator (VCO) working as frequency multiplier. The following
table gives a detailed summary of the internal settings and VCO frequency.
Table 62.
1. The PLL input frequency range is limited to 1 to 3.5 MHz, while the VCO oscillation range is 64 to
Example 1
●
●
●
●
●
Example 2
●
●
●
●
●
●
1
1
1
1
0
0
0
0
(P0H.7-5)
P0.15-13
128 MHz. The CPU clock frequency range when PLL is used is 16 to 40 MHz.
f
P0(15:13) = ‘110’ (multiplication by 3)
PLL input frequency = 1 MHz
VCO frequency = 48 MHz: NOT VALID, must be 64 to 128 MHz
f
f
P0(15:13) = ‘100’ (multiplication by 5)
PLL input frequency = 2 MHz
VCO frequency = 80 MHz
PLL output frequency = 40 MHz (VCO frequency divided by 2)
f
XTAL
CPU
XTAL
CPU
1
1
0
0
1
1
0
0
= NOT VALID
= 40 MHz (no effect of output prescaler)
= 4 MHz
= 8 MHz
1
0
1
0
1
0
1
0
Internal PLL divider mechanism
XTAL frequency
5.3 to 8 MHz
6.4 to 8 MHz
4 to 8 MHz
1 to 40 MHz
4 to 8 MHz
4 to 5 MHz
4 MHz
(1)
(1)
(1)
prescaler
f
f
f
f
f
Input
XTAL
XTAL
XTAL
XTAL
XTAL
–
–
/4
/4
/4
/4
/2
Multiply by Divide by
PLL bypassed
PLL bypassed
64
48
64
40
40
PLL
–
4
4
2
2
2
Electrical characteristics
prescaler
Output
f
PLL
–
–
–
–
–
–
/2
f
CPU frequency
CPU
f
f
f
f
f
f
XTAL
XTAL
XTAL
XTAL
XTAL
XTAL
f
= f
XTAL
XTAL
x 10
145/176
x 4
x 3
x 8
x 5
x 1
/2
x F