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ST7LITEU09 Scheda tecnica(PDF) 79 Page - STMicroelectronics

Il numero della parte ST7LITEU09
Spiegazioni elettronici  8-bit MCU with single voltage Flash memory, ADC, timers
PDF  115 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LITEU09 Scheda tecnica(HTML) 79 Page - STMicroelectronics

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13.3.5 Internal RC oscillator
To improve clock stability and frequency accuracy, it is recommended to place a decoupling capacitor, typically 100nF,
between the VDD and VSS pins as close as possible to the ST7 device
13.3.5.1 Internal RC oscillator calibrated at 5.0V
The ST7 internal clock can be supplied by an internal RC oscillator (selectable by option byte).
Notes:
1. See “INTERNAL RC OSCILLATOR ADJUSTMENT” on page 22
2. Tested in production at 5.0 V only
13.3.5.2 Internal RC oscillator calibrated at 3.3V
The ST7 internal clock can be supplied by an internal RC oscillator (selectable by option byte).
Notes:
1. See “INTERNAL RC OSCILLATOR ADJUSTMENT” on page 22
2. Tested in production at 3.3 V only
Figure 44. Typical accuracy with RCCR=RCCR0 vs VDD= 2.4-6.0V and Temperature
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fRC
Internal RC oscillator frequency
RCCR = FF (reset value),
TA=25°C,VDD=5V
4.4
MHz
RCCR = RCCR01 ),TA=25°C,VDD=5V
8
ACCRC
Accuracy of Internal RC oscilla-
tor with
RCCR=RCCR01)
TA=25°C, VDD=4.5 to 5.5V
2 )
-2.0
+2.0
%
TA=0 to +85°C, VDD=4.5 to 5.5V
2 )
-2.5
+4.0
%
TA=0 to +125°C, VDD=4.5 to 5.5V
2 )
-3.0
+5.0
%
TA=-40°C to 0°C, VDD=4.5 to 5.5V
2 )
-4.0
+2.5
%
tsu(RC)
RC oscillator setup time
TA=25°C, VDD=5V
4 2)
µs
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fRC
Internal RC oscillator frequency
RCCR = FF (reset value),
TA=25°C,VDD=3.3V
4.3
MHz
RCCR = RCCR11 ),TA=25°C,VDD=3.3V
8
ACCRC
Accuracy of Internal RC oscilla-
tor with
RCCR=RCCR11)
TA=25°C, VDD=3.0 to 3.6V
2 )
-1.0
+1.0
%
TA=0 to +85°C, VDD=3.0 to 3.6V
2 )
-2.5
+4.0
%
TA=0 to +125°C, VDD=3.0 to 3.6V
2 )
-3.0
+5.0
%
TA=-40°C to 0°C, VDD=3.0 to 3.6V
2 )
-4.0
+2.5
%
tsu(RC)
RC oscillator setup time
TA=25°C, VDD=3.3V
4 2)
µs
-2.2
-2.0
-1.8
-1.6
-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
RC5V@-45C
RC5V@25C
RC5V@90C
RC5V@130C
RC5V@0C
1



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