AN3029 Datasheet, PDF (7/42 Pages) STMicroelectronics – Getting started with STM8L and STM8AL

AN3029
Power supply
Figure 1. Power supply
VLCD
(optional)
1 μF
VDD
N × 100 nF
+ 1 × 10 μF
STM8L/STM8AL
VLCD
VREF+
VDDA
VSSA
VDD _{1/2/... /N (note 2)}
VSS _{1/2/... /N (note 2)}
VREF
VDD
100 nF + 1 μF
100 nF + 1 μF
(note 1)
Note:
2.2
MS30982V1
1.
Optional:
µF) must
if a
be
csoenpnaeractteed, ^{e. xVt}_R^e_E^rn_F^a₊^{lirseefeitrheenrcceovnonletacgteedistocoVn}_Dⁿ_D^e_A^ctoerdVo_Rⁿ_E^V_F.REF+^,
the
two
capacitors
(100
nF
and
1
2. N is the number of V_DD and V_SS inputs.
The capacitors must be connected as close as possible to the device supplies.
Placing a crystal/resonator on OSCIN/OSCOUT is optional. The resonator must be
connected as close as possible to the OSCIN and OSCOUT pins. The loading capacitance
ground must be connected as close as possible to V_SS.
Main operating voltages
STM8L and STM8AL devices are processed in 0.13 µm technology. The STM8L and
STM8AL core and I/O peripherals need different power supplies. In fact, STM8L and
STM8AL devices have an internal regulator with a nominal target output of 1.8 V.
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