MCHC908GR8VFAE Freescale Semiconductor, MCHC908GR8VFAE Datasheet - Page 102
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MCHC908GR8VFAE
Manufacturer Part Number
MCHC908GR8VFAE
Description
IC MCU 8K FLASH 8MHZ 32-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC908GR4CFAE.pdf
(408 pages)
Specifications of MCHC908GR8VFAE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
21
Program Memory Size
7.5KB (7.5K x 8)
Program Memory Type
FLASH
Ram Size
384 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCHC908GR8VFAE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Clock Generator Module (CGMC)
7.4.1 Crystal Oscillator Circuit
7.4.2 Phase-Locked Loop Circuit (PLL)
7.4.3 PLL Circuits
Technical Data
102
The crystal oscillator circuit consists of an inverting amplifier and an
external crystal. The OSC1 pin is the input to the amplifier and the OSC2
pin is the output. The SIMOSCEN signal from the system integration
module (SIM) or the OSCSTOPENB bit in the CONFIG register enable
the crystal oscillator circuit.
The CGMXCLK signal is the output of the crystal oscillator circuit and
runs at a rate equal to the crystal frequency. CGMXCLK is then buffered
to produce CGMRCLK, the PLL reference clock.
CGMXCLK can be used by other modules which require precise timing
for operation. The duty cycle of CGMXCLK is not guaranteed to be 50%
and depends on external factors, including the crystal and related
external components. An externally generated clock also can feed the
OSC1 pin of the crystal oscillator circuit. Connect the external clock to
the OSC1 pin and let the OSC2 pin float.
The PLL is a frequency generator that can operate in either acquisition
mode or tracking mode, depending on the accuracy of the output
frequency. The PLL can change between acquisition and tracking
modes either automatically or manually.
The PLL consists of these circuits:
Freescale Semiconductor, Inc.
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For More Information On This Product,
Voltage-controlled oscillator (VCO)
Reference divider
Frequency prescaler
Modulo VCO frequency divider
Phase detector
Loop filter
Lock detector
Clock Generator Module (CGMC)
Go to: www.freescale.com
MC68HC908GR8 — Rev 4.0
MOTOROLA
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