C8051F064EK Silicon Laboratories Inc, C8051F064EK Datasheet - Page 171

• Manufacturer Part Number: C8051F064EK
• Description: KIT EVAL FOR C8051F064
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F064EK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F06x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F064
• Silicon Family Name: C8051F06x
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F064
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1219

15.
C8051F060/1/2/3/4/5/6/7 devices include a programmable internal oscillator and an external oscillator
drive circuit. The internal oscillator can be enabled, disabled and calibrated using the OSCICN and
OSCICL registers, as shown in Figure 15.1. The system clock can be sourced by the external oscillator cir-
cuit, the internal oscillator, or a scaled version of the internal oscillator. The internal oscillator's electrical
specifications are given in Table 15.1.
15.1. Programmable Internal Oscillator
All C8051F060/1/2/3/4/5/6/7 devices include a programmable internal oscillator that defaults as the system
clock after a system reset. The internal oscillator period can be adjusted via the OSCICL register as
defined by Figure 15.2.
OSCICL is factory calibrated to obtain a 24.5 MHz base frequency (f
Electrical specifications for the precision internal oscillator are given in Table 15.1. The programmed inter-
nal oscillator frequency must not exceed 25 MHz. Note that the system clock may be derived from the pro-
grammed internal oscillator divided by 1, 2, 4, or 8, as defined by the IFCN bits in register OSCICN.
Oscillators
VDD
Option 2
Option 3
XTAL1
XTAL1
XTAL2
Option 1
Option 4
XTAL1
XTAL1
XTAL2
Figure 15.1. Oscillator Diagram
OSCICL
Rev. 1.2
Circuit
Programmable
Input
Internal Clock
Generator
OSCXCN
C8051F060/1/2/3/4/5/6/7
EN
OSC
OSCICN
BASE
n
).
CLKSEL
1
0
SYSCLK
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