MCF51EM128CLL Freescale Semiconductor, MCF51EM128CLL Datasheet - Page 497

• Manufacturer Part Number: MCF51EM128CLL
• Description: IC MCU 32BIT 128KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM128CLL

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Processor Series: MCF51EM
• Core: ColdFire V1
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: RS-232, LIN
• Maximum Clock Frequency: 50 MHz
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: TWR-MCF51CN-KIT, TWR-SER, TWR-ELEV, TOWER
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

21.7.1.1
The ADC module has analog power and ground supplies (V
on some devices. V
devices, V
pads for the analog supplies bonded to the same pin as the corresponding digital supply so that some degree
of isolation between the supplies is maintained.
When available on a separate pin, both V
as their corresponding MCU digital supply (V
noise immunity and bypass capacitors placed as near as possible to the package.
If separate power supplies are used for analog and digital power, the ground connection between these
supplies must be at the V
possible. The V
21.7.1.2
In addition to the analog supplies, the ADC module has connections for two reference voltage inputs used
by the converter, V
the low reference voltage for the converter.
The ADC can be configured to accept one of three voltage reference pairs for V
pair contains a positive reference and a ground reference. The three pairs are external (V
alternate (V
selected using the REFSEL bits in the ADCSC2 register. The alternate (V
reference pair may select additional external pins or internal sources depending on MCU configuration.
Consult the module introduction for information on the Voltage References specific to this MCU.
In some packages, the external or alternate pairs are connected in the package to V
respectively. One of these positive references may be shared on the same pin as V
One of these ground references may be shared on the same pin as V
If externally available, the positive reference may be connected to the same potential as V
driven by an external source to a level between the minimum Ref Voltage High (defined in Appendix A)
and the V
ground reference must be connected to the same voltage potential as V
must be routed carefully for maximum noise immunity and bypass capacitors placed as near as possible to
the package.
AC current in the form of current spikes required to supply charge to the capacitor array at each successive
approximation step is drawn through the V
current demand is a 0.1 μF capacitor with good high frequency characteristics. This capacitor is connected
between V
path is not recommended because the current causes a voltage drop that could result in conversion errors.
Inductance in this path must be minimum (parasitic only).
Freescale Semiconductor
DDAD
SSAD
REFH
ALTH
Analog Supply Pins
Analog Voltage Reference Pins
SSAD
and V
potential (the positive reference must never exceed V
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
and V
and V
REFSH
SSAD
pin makes a good single point ground location.
DDAD
REFL
ALTL
SSAD
is shared on the same pin as the MCU digital V
and V
) and the internal bandgap (V
and must be placed as near as possible to the package pins. Resistance in the
are shared with the MCU digital supply pins. In these cases, there are separate
pin. This should be the only ground connection between these supplies if
REFSL
. V
DDAD
REFSH
REFH
DD
and V
and V
is the high reference voltage for the converter. V
and V
SSAD
REFL
SS
BGH
must be connected to the same voltage potential
) and must be routed carefully for maximum
loop. The best external component to meet this
DDAD
and V
and V
SSAD
BGL
DDAD
SSAD
). These voltage references are
SSAD
SS
Analog-to-Digital Converter (S08ADC16)
ALTH
on some devices.
). If externally available, the
on some devices. On other
. The voltage reference pairs
) available as separate pins
and V
REFSH
DDAD
DDAD
ALTL
and V
REFH
on some devices.
DDAD
and V
) voltage
REFSL
and V
or may be
SSAD
REFSL
. Each
REFL
,
21-41
is
),