c8051f410 Silicon Laboratories, c8051f410 Datasheet - Page 81

• Manufacturer Part Number: c8051f410
• Description: 2.0 V, 32/16 Kb Flash, Smartclock, 12-bit Adc
• Manufacturer: Silicon Laboratories

8.
C8051F41x devices include an on-chip low dropout voltage regulator (REG0). The input to REG0 at the
V
enabled, the output of REG0 appears on the V
power external devices. On reset, REG0 is enabled and can be disabled by software.
The input (V
tor (4.7 µF + 0.1 µF) to ground. This capacitor will eliminate power spikes and provide any immediate
power required by the microcontroller. A settling time associated with the voltage regulator is shown in
Table 8.1.
If the internal voltage regulator is not used, the V
REGIN
Voltage Regulator (REG0)
pin can be as high as 5.25 V. The output can be selected by software to 2.1 V or 2.5 V. When
Figure 8.1. External Capacitors for Voltage Regulator Input/Output
Figure 8.2. External Capacitors for Voltage Regulator Input/Output
REGIN
) and output (V
REG0
V
V
DD
DD
DD
4.7 µF
) of the voltage regulator should both be protected with a large capaci-
4.7 µF
4.7 µF
DD
REGIN
Rev. 1.0
pin, powers the microcontroller core, and can be used to
input should be tied to V
.1 µF
.1 µF
.1 µF
V
V
C8051F410/1/2/3
V
V
REGIN
DD
REGIN
DD
DD
, as shown in Figure 8.2.
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