MC68HC908AP64CB Freescale Semiconductor, MC68HC908AP64CB Datasheet - Page 74

• Manufacturer Part Number: MC68HC908AP64CB
• Description: IC MCU 64K FLASH 8MHZ 42SDIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AP64CB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SCI, SPI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 30
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• For Use With: DEMO908AP64E - BOARD DEMO FOR 908AP64DEMO908AP64 - BOARD DEMO FOR 908AP64
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Oscillator (OSC)
5.3 Internal Oscillator
The internal oscillator clock (ICLK), with a frequency of f
external components. It can be selected as the CGMXCLK for the CGM and MCU sub-systems; and the
OSCCLK clock for the TBM. The ICLK is also the reference clock input to the computer operating properly
(COP) module.
Due to the simplicity of the internal oscillator, it does not have the accuracy and stability of the RC
oscillator or the x-tal oscillator. Therefore, the ICLK is not suitable where an accurate bus clock is required
and it should not be used as the CGMRCLK to the CGM PLL.
The internal oscillator by default is always available and is free running after POR or reset. It can be
turned-off in stop mode by setting the STOP_ICLKDIS bit before executing the STOP instruction.
Figure 5-4
74
shows the logical representation of components of the internal oscillator circuitry.
MCU
STOP_ICLKDIS
CONFIG2
From SIM
MC68HC908AP Family Data Sheet, Rev. 4
SIMOSCEN
Figure 5-4. Internal Oscillator
INTERNAL OSCILLATOR
To Clock Selection MUX
and COP
EN
ICLK
ICLK
, is a free running clock that requires no
BUS CLOCK
From SIM
OSC2
Freescale Semiconductor