z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 339

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Oscillator Operation with an External RC Network
PS022006-0207
Figure 70. Connecting the On-Chip Oscillator to an External RC Network
Figure 70
external resistor-capacitor (RC) network.
An external resistance value of 15 kΩ is recommended for oscillator operation with an
external RC network. The minimum resistance value to ensure operation is 10 kΩ. The
typical oscillator frequency is estimated from the values of the resistor (R in kΩ) and
capacitor (C in pF) elements using the following equation:
Figure 71
function of the capacitor (C in pF) employed in the RC network assuming a 15 kΩ
external resistor. For very small values of C, the parasitic capacitance of the oscillator
XIN pin and the printed circuit board must be included in the estimation of the oscillator
frequency.
on page 325 illustrates a recommended configuration for connection with an
on page 326 illustrates the typical (3.3 V and 25 °C) oscillator frequency as a
Oscillator Frequency (kHz)
V
DD
P R E L I M I N A R Y
R
C
X
IN
=
------------------------------- -
(
1.5 R C
1
×
×10
×
6
)
Product Specification
ZNEO
On-Chip Oscillator
™
Z16F Series
325