MC68HC908JB16DW Freescale Semiconductor, MC68HC908JB16DW Datasheet - Page 250

• Manufacturer Part Number: MC68HC908JB16DW
• Description: IC MCU 16K FLASH 6MHZ USB 28SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB16DW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 6MHz
• Connectivity: SCI, USB
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Clock Generator Module (CGM)
13.3.1 Reference Frequency Source (OSCXCLK)
13.3.2 Voltage Controlled Oscillator
Technical Data
250
OSCXCLK
REFERENCE
DIVIDER
RDS[9:0]
R
CGMRCLK
The OSCXCLK signal is a buffered output of the crystal oscillator circuit
and runs at a rate equal to the crystal frequency. OSCXCLK is used as
the reference frequency source for both CGM modules.
The VCO clock frequency (CGMVCLK) is generated internally and it is
proportional to the controlled voltage setting by the phase detector
output. The VCO operating range is programmable for a wide range of
frequencies and for maximum immunity to external noise. The
CGMVCLK signal is also the CGM output signal, CGMOUT.
Figure 13-2. CGM Block Diagram
Clock Generator Module (CGM)
DETECTOR
DETECTOR
CGMFCLK
PHD_[7:0]
PHASE
LOCK
LOCK
V
DDA
VDS[11:0]
CGMXFC
DIVIDER
FILTER
LOOP
VCO
N
PLL ANALOG
V
SSA
PLLON
CONTROLLED
OSCILLATOR
CGMVCLK
VOLTAGE
V
MC68HC908JB16
REGA
Freescale Semiconductor
VCO_[7:0]
—
CGMOUT
Rev. 1.1