C8051F996DK Silicon Laboratories Inc, C8051F996DK Datasheet - Page 15

• Manufacturer Part Number: C8051F996DK
• Description: KIT DEV FOR C8051F996
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F996DK

• Contents: Board, Batteries, Cables, CDs, Debug Adapter, Documentation, Power Adapter
• Processor To Be Evaluated: C8051F996
• Processor Series: C8051F98x
• Interface Type: USB
• Operating Supply Voltage: 3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: C8051F996
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1963

C8051F996-DK
7.3. System Clock Sources
7.3.1. Internal Oscillators
The C8051F996 device installed on the target board features a factory calibrated programmable high-frequency
internal oscillator (24.5 MHz base frequency, ±2%) and a low power internal oscillator (20 MHz ±10%). After each
reset, the low power oscillator divided by 8 results in a default system clock frequency of 2.5 MHz (±10%). The
selected system clock and the system clock divider may be configured by software for operation at other
frequencies. For low-frequency operation, the C8051F996 features a smaRTClock real time clock. A 32.768 kHz
Watch crystal (Y2) is included on the target board. If you wish to operate the C8051F996 device at a frequency not
available with the internal oscillators, an external crystal may be used. Refer to the C8051F99x-C8051F98x data
sheet for more information on configuring the system clock source.
7.3.2. External Oscillator Options
The target board is designed to facilitate the installation of an external crystal (Y1). Install a 10 M resistor at R17
and install capacitors at C20 and C21 using values appropriate for the crystal you select. If you wish to operate the
external oscillator in capacitor or RC mode, options to install a capacitor or an RC network are also available on the
target board. Populate C21 for capacitor mode, and populate R16 and C21 for RC mode. Refer to the C8051F99x-
C8051F98x data sheet for more information on the use of external oscillators.
7.4. Port I/O Headers (J2, J3, J18, J6)
Access to all Port I/O on the C8051F996 is provided through the headers J2, J3, and J18. The header J6 provides
access to the ground plane for easy clipping of oscilloscope probes.
Rev. 0.1
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