C8051F334-GMR Silicon Laboratories Inc, C8051F334-GMR Datasheet - Page 115
C8051F334-GMR
Manufacturer Part Number
C8051F334-GMR
Description
IC 8051 MCU 2K FLASH 20MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F33xr
Specifications of C8051F334-GMR
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
2KB (2K 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
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-QFN
For Use With
336-1451 - ADAPTER PROGRAM TOOLSTICK F330
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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The capacitors shown in the external crystal configuration provide the load capacitance required by the
crystal for correct oscillation. These capacitors are "in series" as seen by the crystal and "in parallel" with
the stray capacitance of the XTAL1 and XTAL2 pins.
Note: The desired load capacitance depends upon the crystal and the manufacturer. Please refer to the
crystal data sheet when completing these calculations.
For example, a tuning-fork crystal of 32.768 kHz with a recommended load capacitance of 12.5 pF should
use the configuration shown in Figure 13.1, Option 1. The total value of the capacitors and the stray capac-
itance of the XTAL pins should equal 25 pF. With a stray capacitance of 3 pF per pin, the 22 pF capacitors
yield an equivalent capacitance of 12.5 pF across the crystal, as shown in Figure 13.2.
Figure 13.2. External 32.768 kHz Quartz Crystal Oscillator Connection Diagram
22pF*
* Capacitor values depend on
crystal specifications
32.768 kHz
10M
Rev. 1.7
22pF*
XTAL1
XTAL2
C8051F330/1/2/3/4/5
119
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