ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 205

• Manufacturer Part Number: ST10F276Z5
• Description: 16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
• Manufacturer: STMicroelectronics

Specifications of ST10F276Z5

• Single Voltage Supply: 5V ±10% (embedded regulator for 1.8 V core supply)

ST10F276Z5
23.8.15
Figure 55. 32 kHz crystal oscillator connection diagram
Table 103. Minimum values of negative resistance (module)
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
stray capacitance 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 64 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 an
external clock source can be used but limited in the range of frequencies defined for the
usage of crystal and resonator (refer also to
External clock drive timing conditions: V
32 kHz
Warning:
C
A
= 6 pF C
-
Direct driving on XTAL3 pin is not supported. Always use a
32 kHz crystal oscillator.
A
do not include the stray capacitance of the package and of the
A
= 12 pF C
-
A
= 15 pF C
-
DD
C
A
ST10F276
= 5 V ±10%, V
Crystal
Table 97 on page
A
= 18 pF C
-
C
A
SS
A
150 kΩ
= 22 pF C
= 0 V, T
198).
0
Electrical characteristics
), the package and the
A
= –40 to +125 °C
A
120 kΩ
= 27 pF C
A
90 kW
= 33 pF
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