MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 126

• Manufacturer Part Number: MC68HC908SR12CFA
• Description: MICROCONTROLLER 48 PIN
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908SR12CFA

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, Temp Sensor
• Number Of I /o: 31
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Q1145673

Clock Generator Module (CGM)
8.5.1 External Filter Capacitor Pin (CGMXFC)
8.5.2 PLL Analog Power Pin (V
8.5.3 PLL Analog Ground Pin (V
8.5.4 Oscillator Output Frequency Signal (CGMXCLK)
8.5.5 CGM Reference Clock (CGMRCLK)
Data Sheet
126
NOTE:
NOTE:
NOTE:
The CGMXFC pin is required by the loop filter to filter out phase
corrections. An external filter network is connected to this pin. (See
Figure
To prevent noise problems, the filter network should be placed as close
to the CGMXFC pin as possible, with minimum routing distances and no
routing of other signals across the network.
V
V
Route V
capacitors as close as possible to the package.
V
the V
Route V
capacitors as close as possible to the package.
CGMXCLK is the oscillator output signal. It runs at the full speed of the
oscillator, and is generated directly from the crystal oscillator circuit, the
RC oscillator circuit, or the internal oscillator circuit.
CGMRCLK is a buffered version of CGMXCLK, this clock is the
reference clock for the phase-locked-loop circuit.
DDA
DDA
SSA
SSA
is a ground pin used by the analog portions of the PLL. Connect
is a power pin used by the analog portions of the PLL. Connect the
pin to the same voltage potential as the V
8-3.)
DDA
SSA
pin to the same voltage potential as the V
DDA
Clock Generator Module (CGM)
SSA
carefully for maximum noise immunity and place bypass
carefully for maximum noise immunity and place bypass
)
)
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
DD
Freescale Semiconductor
pin.
SS
pin.