MC68HC908AB32CFU Freescale Semiconductor, MC68HC908AB32CFU Datasheet - Page 133

• Manufacturer Part Number: MC68HC908AB32CFU
• Description: IC MCU 8MHZ 32K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AB32CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.4 Functional Description
MC68HC908AB32
Freescale Semiconductor
SIMOSCEN
OSC2
OSC1
CGMRDV
DETECTOR
DETECTOR
—
CGMVDV
PHASE
LOCK
LOCK
Rev. 1.1
CRYSTAL OSCILLATOR
The CGM consists of three major sub-modules:
Figure 9-1
•
•
•
V
DDA
CGMRCLK
Crystal oscillator circuit which generates the constant crystal
frequency clock, CGMXCLK.
Phase-locked loop (PLL) which generates the programmable
VCO frequency clock CGMVCLK.
Base clock selector circuit; this software-controlled circuit selects
either CGMXCLK divided by two or the VCO clock CGMVCLK
divided by two, as the base clock CGMOUT. The SIM derives the
system clocks from CGMOUT.
Figure 9-1. CGM Block Diagram
AUTO
FREQUENCY
BANDWIDTH
CONTROL
CGMXFC
MUL[7:4]
DIVIDER
Clock Generator Module (CGM)
FILTER
shows the structure of the CGM.
LOOP
ACQ
PLL ANALOG
V
SS
CIRCUIT
SELECT
CLOCK
PLLIE
CONTROLLED
BCS
OSCILLATOR
INTERRUPT
CONTROL
CGMVCLK
VOLTAGE
VRS[7:4]
PLLF
÷
2
CGMXCLK
A
B S*
Clock Generator Module (CGM)
*When S = 1, CGMOUT = B
CGMOUT
CGMINT
USER MODE
PTC3
MONITOR MODE
TO SIM, SCI
Technical Data
TO SIM
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