C8051F560-TB Silicon Laboratories Inc, C8051F560-TB Datasheet - Page 79
![BOARD PROTOTYPE W/C8051F560](/photos/9/25/92557/c8051f560-tb_sml.jpg)
C8051F560-TB
Manufacturer Part Number
C8051F560-TB
Description
BOARD PROTOTYPE W/C8051F560
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Datasheet
1.TOOLSTICK560DC.pdf
(302 pages)
Specifications of C8051F560-TB
Contents
Board
Processor To Be Evaluated
C8051F56x
Processor Series
C8051F56x
Interface Type
USB
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
1.8 V to 5.25 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F55x, C8051F56x, C8051F57x
For Use With
336-1691 - KIT DEVELOPMENT FOR C8051F560
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1694
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9. Voltage Regulator (REG0)
C8051F55x/56x/57x 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 Voltage regulator can generate an interrupt (if enabled by EREG0, EIE2.0) that is triggered whenever
the V
flag and the recommended procedure to use it is as follows:
1. Wait enough time to ensure the V
2. Enable the dropout interrupt (EREG0, EIE2.0) and select the proper priority (PREG0, EIP2.0)
3. If triggered, inside the interrupt disable it (clear EREG0, EIE2.0), execute all procedures necessary to
4. In the main application, now running in the safe mode, regularly checks the DROPOUT bit
The input (V
tor (4.7 µF + 0.1 µF) to ground as shown in Figure 9.1 below. This capacitor will eliminate power spikes
and provide any immediate power required by the microcontroller. The settling time associated with the
voltage regulator is shown in Table 5.8 on page 43.
If the internal voltage regulator is not used, the V
protect your application (put it in a safe mode and leave the interrupt now disabled.
(REG0CN.0). Once it is cleared by the regulator hardware the application can enable the interrupt
again (EREG0, EIE1.6) and return to the normal mode operation.
REGIN
REGIN
input voltage drops below the dropout threshold voltage. This dropout interrupt has no pending
REGIN
Figure 9.1. External Capacitors for Voltage Regulator Input/Output—
pin can be as high as 5.25 V. The output can be selected by software to 2.1 V or 2.6 V. When
) and output (V
REG0
V
DD
DD
) of the voltage regulator should both be bypassed with a large capaci-
4.7 µF
4.7 µF
REGIN
Regulator Enabled
input voltage is stable
DD
REGIN
Rev. 1.1
pin, powers the microcontroller core, and can be used to
input should be tied to V
.1 µF
.1 µF
C8051F55x/56x/57x
V
V
REGIN
DD
DD
, as shown in Figure 9.2.
79
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