MCL908QY2CDTE Freescale Semiconductor, MCL908QY2CDTE Datasheet - Page 89

• Manufacturer Part Number: MCL908QY2CDTE
• Description: IC MCU 8BIT 1.5K FLASH 16-TSSOP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MCL908QY2CDTE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 2MHz
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 1.5KB (1.5K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -

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 forth 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:
11.3.1 Internal Oscillator
The internal oscillator circuit is designed for use with no external components to provide a clock source
with tolerance less than ±25% untrimmed. An 8-bit trimming register allows adjustment to a tolerance of
less than ±5%.
The internal oscillator will generate a clock of 4.0 MHz typical (INTCLK) resulting in a bus speed (internal
clock ÷ 4) of 1.0 MHz.
Figure 11-3
BUSCLKX4 by setting OSC2EN in PTAPUE register. See
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
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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
shows how BUSCLKX4 is derived from INTCLK and, like the RC oscillator, OSC2 can output
MC68HLC908QY/QT Family Data Sheet, Rev. 3
Chapter 12 Input/Output Ports
(PORTS).
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