MC68HC908SR12CFA Freescale Semiconductor, MC68HC908SR12CFA Datasheet - Page 139

• 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

8.9.3 Choosing a Filter
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
As described in
external filter network is critical to the stability and reaction time of the
PLL. The PLL is also dependent on reference frequency and supply
voltage.
Either of the filter networks in
a 32.768kHz reference clock (CGMRCLK).
applications requiring better stability.
applications where stability is not critical.
Clock Generator Module (CGM)
0.033 µF
8.9.2 Parametric Influences on Reaction
10 kΩ
CGMXFC
(a)
Figure 8-10. PLL Filter
V
SSA
Figure 8-10
0.01 µF
Figure 8-10
Acquisition/Lock Time Specifications
is recommended when using
Figure 8-10
Clock Generator Module (CGM)
CGMXFC
V
SSA
(b)
(b) is used in low-cost
0.47 µF
(a) is used for
Time, the
Data Sheet
139