ST7PLITEU09M3TR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST7PLITEU09M3TR Datasheet PDF : 115 Pages
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ST7LITEU05 ST7LITEU09
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).
Symbol
Parameter
Conditions
Min
RCCR = FF (reset value),
fRC
Internal RC oscillator frequency TA=25°C,VDD=5V
RCCR = RCCR01 ),TA=25°C,VDD=5V
ACCRC
Accuracy of Internal RC oscilla-
tor with
RCCR=RCCR01)
TA=25°C, VDD=4.5 to 5.5V 2 )
TA=0 to +85°C, VDD=4.5 to 5.5V 2 )
TA=0 to +125°C, VDD=4.5 to 5.5V 2 )
-2.0
-2.5
-3.0
TA=-40°C to 0°C, VDD=4.5 to 5.5V 2 ) -4.0
tsu(RC) RC oscillator setup time
TA=25°C, VDD=5V
Typ
Max Unit
4.4
MHz
8
+2.0 %
+4.0 %
+5.0 %
+2.5 %
4 2)
µs
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).
Symbol
Parameter
Conditions
Min
RCCR = FF (reset value),
fRC
Internal RC oscillator frequency TA=25°C,VDD=3.3V
RCCR = RCCR11 ),TA=25°C,VDD=3.3V
TA=25°C, VDD=3.0 to 3.6V 2 )
-1.0
Accuracy of Internal RC oscilla-
ACCRC tor with
RCCR=RCCR11)
TA=0 to +85°C, VDD=3.0 to 3.6V 2 )
TA=0 to +125°C, VDD=3.0 to 3.6V 2 )
-2.5
-3.0
TA=-40°C to 0°C, VDD=3.0 to 3.6V 2 )
-4.0
tsu(RC) RC oscillator setup time
TA=25°C, VDD=3.3V
Typ
Max Unit
4.3
MHz
8
+1.0 %
+4.0 %
+5.0 %
+2.5 %
4 2)
µs
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
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
RC5V@-45C
-1.0
RC5V@25C
-1.2
-1.4
RC5V@90C
-1.6
RC5V@130C
-1.8
RC5V@0C
-2.0
-2.2
79/115
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