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ST7LUS5 データシート(PDF) 94 Page - STMicroelectronics

部品番号 ST7LUS5
部品情報  8-bit low cost, low pin-count MCU for automotive,with single voltage Flash memory, ADC, timers
PDF  124 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LUS5 データシート(HTML) 94 Page - STMicroelectronics

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Electrical characteristics
ST7LUS5, ST7LU05, ST7LU09
94/124
12.3.1
Internal RC oscillator
The ST7 internal clock can be supplied by an internal RC oscillator (selectable by option
byte).
Note:
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.
Table 66.
Internal RC oscillator calibrated at 5.0V
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fRC
Internal RC oscillator
frequency
RCCR = FF (reset value), TA =25°C, VDD = 5V
4.5
MHz
RCCR = RCCR0(1), TA = 25°C, VDD =5V
8
ACCRC
RC resolution
VDD = 5V
-2
+2
%
Accuracy of internal RC
oscillator with
RCCR = RCCR0(1)
TA = 0°C to +125°C, VDD = 5V
-5
+5
TA = -40°C to +125°C, VDD =4.5 to 5.5V
TBD
TBD
IDD(RC)
RC oscillator current
consumption
TA = 25°C, VDD = 5V
900(2)
µA
tsu(RC) RC oscillator setup time
TA = 25°C, VDD = 5V
4(2)
µs
1.
See Internal RC oscillator adjustment on page 27
2.
Guaranteed by Design
Table 67.
Internal RC oscillator calibrated at 3.3V
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fRC
Internal RC oscillator
frequency
RCCR = FF (reset value), TA = 25°C, VDD = 3.3V
4.4
MHz
RCCR = RCCR1(1), TA = 25°C, VDD =3.3V
8
ACCRC
RC resolution
VDD = 3.3V
-2
+2
%
Accuracy of internal RC
oscillator with
RCCR = RCCR1(1)
TA = 0°C to +125°C, VDD = 3.3V
-7
+7
TA = -40°C to +125°C, VDD = 3.0 to 3.6V
TBD
TBD
IDD(RC)
RC oscillator current
consumption
TA = 25°C, VDD = 3.3V
900(2)
µA
tsu(RC) RC oscillator setup time
TA = 25°C, VDD = 3.3V
4(2)
µs
1.
See Internal RC oscillator adjustment on page 27
2.
Guaranteed by Design



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