MMC2114CFCAG33 Freescale Semiconductor, MMC2114CFCAG33 Datasheet - Page 521

• Manufacturer Part Number: MMC2114CFCAG33
• Description: IC MCU 32BIT 33MHZ 144-LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCorer

Specifications of MMC2114CFCAG33

• Core Processor: M210
• Core Size: 32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Processor Series: MMC2114
• Core: M-CORE
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: SCI/SPI
• Maximum Clock Frequency: 33 MHz
• Number Of Programmable I/os: 104
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Controller Family/series: MCORE
• No. Of I/o's: 104
• Ram Memory Size: 32KB
• Cpu Speed: 33MHz
• No. Of Timers: 2
• Embedded Interface Type: SCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

19.11.7 Analog Input Pins
MMC2114 • MMC2113 • MMC2112 — Rev. 1.0
MOTOROLA
V
R
SRC
SRC
= Source voltage
= Source impedance
SOURCE
V
SRC
R
SRC
EXTERNAL FILTER
Figure 19-53. Electrical Model of an A/D Input Pin
Analog inputs should have low ac impedance at the pins. Low ac
impedance can be realized by placing a capacitor with good high
frequency characteristics at the input pin of the part. Ideally, that
capacitor should be as large as possible (within the practical range of
capacitors that still have good high-frequency characteristics). This
capacitor has two effects:
Series resistance can be used with the capacitor on an input pin to
implement a simple RC filter. The maximum level of filtering at the input
pins is application dependent and is based on the bandpass
characteristics required to accurately track the dynamic characteristics
of an input. Simple RC filtering at the pin may be limited by the source
impedance of the transducer or circuit supplying the analog signal to be
measured. (See
cases, the size of the capacitor at the pin may be very small.
Figure 19-53
model in the following discussion of the interaction between the external
circuitry and the circuitry inside the QADC.
R F
•
•
Freescale Semiconductor, Inc.
C
F
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
R
C
It helps attenuate any noise that may exist on the input.
It sources charge during the sample period when the analog signal
source is a high-impedance source.
F
F
= Filter impedance
= Filter capacitor
INTERNAL CIRCUIT MODEL
Go to: www.freescale.com
is a simplified model of an input channel. Refer to this
S1
19.11.7.2 Error Resulting from
C
P
AMP
C
C
V
P
I
SAMP
= Internal voltage source during sample and hold
= Internal parasitic capacitance
= Sample capacitor
Queued Analog-to-Digital Converter (QADC)
S2
Pin Connection Considerations
C
SAMP
Leakage.) In some
S3
Advance Information
V
I
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