ST10F272M-4T3 STMicroelectronics, ST10F272M-4T3 Datasheet - Page 150
ST10F272M-4T3
Manufacturer Part Number
ST10F272M-4T3
Description
MCU 16BIT 256K FLASH 144-LQFP
Manufacturer
STMicroelectronics
Series
ST10r
Datasheet
1.ST10F272M-4TR3.pdf
(176 pages)
Specifications of ST10F272M-4T3
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ST10F272M-4T3
Manufacturer:
STMicroelectronics
Quantity:
10 000
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Electrical characteristics
24.8.13
150/176
Table 67.
The given values of C
printed circuit board: the negative resistance values are calculated assuming additional 5 pF
to the values in the table. The crystal shunt capacitance (C
between XTAL3 and XTAL4 pins is globally assumed equal to 4 pF. The external resistance
between XTAL3 and XTAL4 is not necessary, since already present on the silicon.
External clock drive XTAL1
When direct drive configuration is selected during reset, it is possible to drive the CPU clock
directly from the XTAL1 pin, without particular restrictions on the maximum frequency, since
the on-chip oscillator amplifier is bypassed. The speed limit is imposed by internal logic that
targets a maximum CPU frequency of 40 MHz.
In all other clock configurations (direct drive with prescaler or PLL usage) the on-chip
oscillator amplifier is not bypassed, so it determines the input clock speed limit. Then, when
the on-chip oscillator is enabled it is forbidden to use any external clock source different
from crystal or ceramic resonator.
Table 68.
1. The minimum value for the XTAL1 signal period is considered the theoretical minimum. The real minimum
2. 4 to 8 MHz is the input frequency range when using an external clock source. 40 MHz can be applied with
3. The input clock signal must reach the defined levels V
XTAL1 period
High time
Low time
Rise time
Fall time
Frequency
32 kHz
value depends on the duty cycle of the input clock signal.
an external clock source only when direct drive mode is selected: in this case, the oscillator amplifier is
bypassed so it does not limit the input frequency.
Parameter
Warning:
(3)
(3)
(3)
(3)
Minimum values of negative resistance (module) for 32 kHz oscillator
External clock drive
(1)(2)
C
6 pF
A
-
t
t
t
t
t
=
OSC
1
2
3
4
Direct driving on XTAL3 pin is not supported. Always use a
32 kHz crystal oscillator.
Symbol
A
do not include the stray capacitance of the package and of the
SR
SR
SR
SR
SR
12 pF
C
A
-
=
Min
25
Direct drive
f
6
6
–
–
CPU
= f
15 pF
C
XTAL
A
-
Max
=
–
–
–
2
2
IL2
and V
18 pF
Direct drive with
C
83.3
Min
f
A
-
CPU
3
3
–
–
prescaler
=
IH2
= f
.
XTAL
0
) and the package capacitance
150 kΩ
Max
250
22 pF
C
–
–
2
2
/2
A
=
f
83.3
CPU
Min
6
6
–
–
120 kΩ
PLL usage
27 pF
C
= f
A
=
XTAL
ST10F272M
Max
250
–
–
2
2
x F
33 pF
90 kΩ
C
A
Unit
=
ns
ns
ns
ns
ns
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