z8fmc16100 ZiLOG Semiconductor, z8fmc16100 Datasheet - Page 247

• Manufacturer Part Number: z8fmc16100
• Description: Z8 Encore Motor Control Flash Mcus
• Manufacturer: ZiLOG Semiconductor

On-Chip Oscillator
PS024611-0408
Crystal Oscillator Operation
The products in the Z8FMC16100 Series Flash MCU features an on-chip oscillator for use
with external crystals with frequencies ranging from 32 kHz to 20 MHz. In addition, the
oscillator supports ceramic resonators with oscillation frequencies up to 20 MHz. This
oscillator generates the primary system clock for the internal eZ8 CPU and the majority of
the on-chip peripherals. Alternatively, the X
clock input signal (32 kHz to 20 MHz). If an external clock generator is used, the X
pin must remain unconnected.
When configured for use with crystal oscillators or external clock drivers, the frequency of
the signal on the X
internal clock divider).
Figure 40
fundamental-mode, parallel-resonant crystal operating at 20 MHz. Recommended
20 MHz crystal specifications are provided in
must add no more than 4 pF of stray capacitance to either the X
oscillation does not occur, reduce the values of capacitors C1 and C2 to decrease loading.
C = 22 pF
2
X
Figure 40. Recommended 20 MHz Crystal Oscillator Configuration
IN
displays a recommended configuration for connection with an external
IN
input pin determines the frequency of the system clock (that is, no
(Fundamental Mode)
On-Chip Oscillator
20 MHz Crystal
IN
Table
input pin can also accept a CMOS-level
X
OUT
Z8FMC16100 Series Flash MCU
132. The printed circuit board layout
C = 22 pF
2
Product Specification
Crystal Oscillator Operation
IN
or X
OUT
pins. If
OUT
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