MC68HC908LK24CFU Freescale Semiconductor, MC68HC908LK24CFU Datasheet - Page 110

• Manufacturer Part Number: MC68HC908LK24CFU
• Description: IC MCU 24K FLASH 8MHZ SPI 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908LK24CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SPI
• Peripherals: LCD, LVD, POR, PWM
• Number Of I /o: 40
• Program Memory Size: 24KB (24K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Clock Generator Module (CGM)
8.2 Introduction
Data Sheet
110
8.7
8.8
8.8.1
8.8.2
8.8.3
8.9
8.9.1
8.9.2
8.9.3
This section describes the clock generator module (CGM). The CGM
generates the base clock signal, CGMOUT, which is based on either the
oscillator clock divided by two or the divided phase-locked loop (PLL)
clock, CGMPCLK, divided by two. CGMOUT is the clock from which the
SIM derives the system clocks, including the bus clock, which is at a
frequency of CGMOUT÷2.
The PLL is a frequency generator designed for use with a low frequency
crystal (typically 32.768kHz) to generate a base frequency and dividing
to a maximum bus frequency of 8MHz.
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
Special Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Acquisition/Lock Time Specifications . . . . . . . . . . . . . . . . . . . 135
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134
CGM During Break Interrupts. . . . . . . . . . . . . . . . . . . . . . . 134
Acquisition/Lock Time Definitions. . . . . . . . . . . . . . . . . . . .135
Parametric Influences on Reaction Time . . . . . . . . . . . . . . 135
Choosing a Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Clock Generator Module (CGM)
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor