MC68HC908QT2CPE Freescale, MC68HC908QT2CPE Datasheet - Page 89

MC68HC908QT2CPE

Manufacturer Part Number
MC68HC908QT2CPE
Description
Manufacturer
Freescale
Datasheet

Specifications of MC68HC908QT2CPE

Cpu Family
HC08
Device Core Size
8b
Frequency (max)
8MHz
Total Internal Ram Size
128Byte
# I/os (max)
6
Number Of Timers - General Purpose
2
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
4-chx8-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
8
Package Type
PDIP
Program Memory Type
Flash
Program Memory Size
1.5KB
Lead Free Status / RoHS Status
Compliant
Chapter 11
Oscillator Module (OSC)
11.1 Introduction
The oscillator module is used to provide a stable clock source for the microcontroller system and bus. The
oscillator module generates two output clocks, BUSCLKX2 and BUSCLKX4. The BUSCLKX4 clock is
used by the system integration module (SIM) and the computer operating properly module (COP). The
BUSCLKX2 clock is divided by two in the SIM to be used as the bus clock for the microcontroller.
Therefore the bus frequency will be one fourth of the BUSCLKX4 frequency.
11.2 Features
The oscillator has these four clock source options available:
11.3 Functional Description
The oscillator contains these major subsystems:
Freescale Semiconductor
1. Internal oscillator: An internally generated, fixed frequency clock, trimmable to ±5%.This is the
2. External oscillator: An external clock that can be driven directly into OSC1.
3. External RC: A built-in oscillator module (RC oscillator) that requires an external R connection only.
4. External crystal: A built-in oscillator module (XTAL oscillator) that requires an external crystal or
default option out of reset.
The capacitor is internal to the chip.
ceramic-resonator.
Internal oscillator circuit
Internal or external clock switch control
External clock circuit
External crystal circuit
External RC clock circuit
MC68HC908QY/QT Family Data Sheet, Rev. 6
89

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