C8051F330 Silicon Laboratories Inc, C8051F330 Datasheet - Page 17
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C8051F330
Manufacturer Part Number
C8051F330
Description
IC 8051 MCU 8K FLASH 20MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F33xr
Datasheet
1.C8051F330R.pdf
(208 pages)
Specifications of C8051F330
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
17
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 16x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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1.1.3. Additional Features
The C8051F330/1, C8051F330D SoC family includes several key enhancements to the CIP-51 core and
peripherals to improve performance and ease of use in end applications.
The extended interrupt handler provides 14 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 multi-tasking, real-time systems.
Eight reset sources are available: power-on reset circuitry (POR), an on-chip
when power supply voltage drops below V
Missing Clock Detector, a voltage level detection from Comparator0, a forced software reset, an external
reset pin, and an illegal Flash access protection circuit. Each reset source except for the POR, Reset Input
Pin, or Flash error may be disabled by the user in software. The WDT may be permanently enabled in soft-
ware after a power-on reset during MCU initialization.
The internal oscillator factory calibrated to 24.5 MHz ±2%. This internal oscillator period may be user pro-
grammed in ~0.5% increments. An additional low-frequency oscillator is also available which facilitates
low-power operation. An external oscillator drive circuit is 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 between both internal and external oscillator circuits. An external oscil-
lator can also be extremely useful in low power applications, allowing the MCU to run from a slow (power
saving) source, while periodically switching to the fast (up to 25 MHz) internal oscillator as needed.
XTAL1
XTAL2
Frequency
Oscillator
Oscillator
Oscillator
External
Internal
Drive
Low
Px.x
Px.x
Clock Select
System
Clock
Comparator 0
+
-
Figure 1.4. On-Chip Clock and Reset
Detector
Missing
C0RSEF
Clock
(one-
shot)
Microcontroller
EN
Extended Interrupt
CIP-51
RST
Core
Handler
WDT
PCA
as given in Table 10.1 on page 94), a Watchdog Timer, a
EN
VDD
C8051F330/1, C8051F330D
Rev. 1.2
System Reset
Supply
Monitor
+
-
Enable
(Software Reset)
SWRSF
'0'
Power On
Reset
Operation
FLASH
V
Errant
DD monitor (forces reset
(wired-OR)
Reset
Funnel
/RST
17