Table 32. Lse Oscillator Characteristics (F Lse = 32.768 Khz); Figure 15. Typical Application With An 8 Mhz Crystal - STMicroelectronics STM32F038C6 Manual

STM32F038x6
1. R value depends on the crystal characteristics.
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Low-speed external clock generated from a crystal resonator
The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal resonator
oscillator. All the information given in this paragraph are based on design simulation results
obtained with typical external components specified in
resonator and the load capacitors have to be placed as close as possible to the oscillator
pins in order to minimize output distortion and startup stabilization time. Refer to the crystal
resonator manufacturer for more details on the resonator characteristics (frequency,
package, accuracy).
Table 32. LSE oscillator characteristics (f
Symbol Parameter
I LSE current consumption
DD

Figure 15. Typical application with an 8 MHz crystal

Conditions
LSEDRV[1:0]=00
lower driving capability
LSEDRV[1:0]= 01
medium low driving capability
LSEDRV[1:0] = 10
medium high driving capability
LSEDRV[1:0]=11
higher driving capability
DocID026079 Rev 3
Electrical characteristics
Table 32. In the application, the
= 32.768 kHz)
LSE
(1) (2)
Min
-
-
-
-
(2)
Typ Max Unit
0.5 0.9
- 1
µA
- 1.3
- 1.6
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