C8051F300-TB Silicon Laboratories Inc, C8051F300-TB Datasheet - Page 17
C8051F300-TB
Manufacturer Part Number
C8051F300-TB
Description
BOARD PROTOTYPING W/C8051F300
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F300-TB
Contents
Board
Data Bus Width
8 bit
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F300
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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1.1.3. Additional Features
The C8051F300/1/2/3/4/5 SoC family includes several key enhancements to the CIP-51 core and periph-
erals to improve performance and ease of use in end applications.
The extended interrupt handler provides 12 interrupt sources into the CIP-51 (as opposed to 7 for the stan-
dard 8051), allowing numerous analog and digital peripherals to interrupt the controller. An interrupt driven
system requires less intervention by the MCU, giving it more effective throughput. The extra interrupt
sources are very useful when building multitasking, real-time systems.
Eight reset sources are available: power-on reset circuitry (POR), an on-chip V
when power supply voltage drops below 2.7 V), a Watchdog Timer, a Missing Clock Detector, a voltage
level detection from Comparator0, a forced software reset, an external reset pin, and an illegal Flash
read/write protection circuit. Each reset source except for the POR, Reset Input Pin, or Flash protection
may be disabled by the user in software. The WDT may be permanently enabled in software after a power-
on reset during MCU initialization.
The internal oscillator is available as a factory calibrated 24.5 MHz ±2% (C8051F300/1 devices); an uncal-
ibrated version is available on C8051F302/3/4/5 devices. On all C8051F300/1/2/3/4/5 devices, the internal
oscillator period may be user programmed in ~0.5% increments. An external oscillator drive circuit is also
included, allowing an external crystal, ceramic resonator, capacitor, RC, or CMOS clock source to generate
the system clock. If desired, the system clock source may be switched on-the-fly to the external oscillator
circuit. An external oscillator can be extremely useful in low power applications, allowing the MCU to run
from a slow (power saving) external crystal source, while periodically switching to the fast (up to 25 MHz)
internal oscillator as needed.
XTAL1
XTAL2
Oscillator
Oscillator
External
Internal
Drive
P0.x
P0.y
Figure 1.4. On-Chip Clock and Reset
Clock Select
System
Clock
Comparator 0
+
-
Detector
Missing
Clock
(one-
shot)
Microcontroller
EN
Extended Interrupt
C0RSEF
CIP-51
Core
Handler
VDD
WDT
PCA
EN
Rev. 2.9
Supply
Monitor
+
-
System Reset
Enable
Power On
Reset
C8051F300/1/2/3/4/5
(Software Reset)
SWRSF
'0'
Operation
FLASH
Illegal
(wired-OR)
Reset
Funnel
DD
monitor (forces reset
/RST
17
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