STM8S207xx, STM8S208xx
Electrical characteristics
10.3.4
Internal clock sources and timing characteristics
Subject to general operating conditions for V and T . f
HSE
DD
A
High speed internal RC oscillator (HSI)
Table 33. HSI oscillator characteristics
Symbol
Parameter
Frequency
Conditions
Min
Typ
Max
Unit
fHSI
16
MHz
Trimmed by the
CLK_HSITRIMR register
for given VDD and TA
conditions
Accuracy of HSI oscillator
-1(1)
1(1)
VDD = 5 V, TA = 25 °C
-1.5
-2.2
1.5
2.2
ACCHSI
VDD = 5 V,
25 °C ≤ TA ≤ 85 °C
%
Accuracy of HSI oscillator
(factory calibrated)
2.95 V ≤ VDD ≤ 5.5 V,
-40 °C ≤ TA ≤ 125 °C
-3(2)
3(2)
1(1)
HSI oscillator wakeup
time including calibration
tsu(HSI)
µs
HSI oscillator power
consumption
IDD(HSI)
170
250(2)
µA
1. Guaranteeed by design, not tested in production.
2. Data based on characterization results, not tested in production
Figure 18. Typical HSI frequency variation vs V at 4 temperatures
DD
-40˚C
25˚C
85˚C
125˚C
3%
2%
1%
0%
-1%
-2%
-3%
2.5
3
3.5
4
4.5
(V)
5
5.5
6
V
DD
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