Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 331

• Manufacturer Part Number: Z8F16800144ZCOG
• Description: KIT DEV FOR Z8F642 MCU 44 PIN
• Manufacturer: Zilog
• Series: Z8 Encore!®r
• Type: MCUr

Specifications of Z8F16800144ZCOG

• Contents: Hardware, Software and Documentation
• For Use With/related Products: Z8F642
• For Use With: 269-4661 - KIT ACC ETHERNET SMART CABLE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4678

Internal Precision Oscillator
Overview
Operation
PS025011-1010
The Internal Precision Oscillator (IPO) is designed for use without external components.
You can either manually trim the oscillator for a non-standard frequency or use the auto-
matic factory-trimmed version to achieve a 0.0432–11.0592 MHz frequency. IPO features
include:
•
•
•
•
•
The internal oscillator is an RC relaxation oscillator that has its sensitivity to power supply
variation minimized. By using ratio tracking thresholds, the effect of power supply voltage
is cancelled out. The dominant source of oscillator error is the absolute variance of chip
level fabricated components, like capacitors. An 8-bit trimming register incorporated into
the design compensates for absolute variation of oscillator frequency. Once trimmed, the
oscillator frequency is stable and does not require subsequent calibration. Trimming is
performed during manufacturing and is not necessary for you to repeat unless a frequency
other than one of the selectable frequencies is required. Power down this block for
minimum system power.
By default, the oscillator is configured through the Flash Option bits. However, the user
code can override these trim values as described in
Select one of the frequencies for the oscillator using the INTSEL bits in the
Control1 Register
On-chip RC oscillator that does not require external components
Selectable output frequency: 11.0592 MHz, 5.5296 MHz, 2.7648 MHz, 1.3824 MHz,
0.6912 MHz, 0.3456 MHz, 0.0864 MHz, and 0.0432 MHz.
Trimming possible through Flash-option bits with user override
Elimination of crystals or ceramic resonators in applications where high timing accuracy
is not required
Accuracy
:
± 4% over temperature and voltage
on page 309.
P R E L I M I N A R Y
Trim Bit Address Space
Z8 Encore! XP
Product Specification
Internal Precision Oscillator
®
F1680 Series
on page 272.
Oscillator
317