MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 463

• Manufacturer Part Number: MCF51EM256CLL
• Description: IC MCU 32BIT 256KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLL

• 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: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K 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: DEMOEM
• 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

21.3.4
V
voltage reference pairs for V
minimum Ref Voltage High (defined in Appendix A) and V
at the same potential as V
V
REFSEL bits.The alternate (V
or internal sources depending on MCU configuration.Consult the module introduction for information on
the Voltage References specific to this MCU.
In some packages, V
reference(s) to the same voltage potential as V
21.3.5
The ADC module supports up to 24 single-ended analog inputs. A single-ended input is selected for
conversion through the ADCHn channel select bits when the DIFFn bit in the ADCSC1n register is low.
21.3.6
The ADC module supports up to four differential analog channel inputs. Each differential analog input is
a pair of external pins (DADPx and DADMx) referenced to each other to provide the most accurate analog
to digital readings. A differential input is selected for conversion through the ADCHn channel select bits
when the DIFFn bit in the ADCSC1n register bit is high.
21.4
These memory-mapped registers control and monitor operation of the ADC:
Freescale Semiconductor
ALTL
REFSL
•
•
•
•
•
•
•
•
•
•
•
•
) and the internal bandgap (V
Status and channel control registers, ADCSC1A:ADCSC1n
Configuration registers, ADCCFG1 and ADCCFG2
Data result registers, ADCRHA:ADCRLA to ADCRHn:ADCRLn
Compare value registers, ADCCV1H, ADCCV1L, ADCCV2H, and ADCCV2L
General status and control registers, ADCSC2 and ADCSC3
Configuration registers, ADCCFG1 and ADCCFG2
Offset Correction Registers, ADCOFSH and ADCOFSL
Plus-input gain registers, ADCPGH and ADCPGL
Minus-input gain registers, ADCMGH and ADCMGL
Plus-side general calibration registers, ADCCLP0, ADCCLP1, ADCCLP2, ADCCLP3H,
ADCCLP3L, ADCCLP4H, ADCCLP4L, ADCCLSP, ADCCLDP
Minus-side general calibration registers, ADCCLM0, ADCCLM1, ADCCLM2, ADCCLM3H,
ADCCLM3L, ADCCLM4H, ADCCLM4L, ADCCLSM, ADCCLDM
Pin enable registers, APCTL1, APCTL2, APCTL3, and APCTL4
is the low reference voltage for the converter.The ADC can be configured to accept one of three
Register Definition
Voltage Reference Select Low (V
Analog Channel Inputs (ADx)
Differential Analog Channel Inputs (DADx)
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
REFL
is connected in the package to V
SSAD
REFSL
ALTH
. The three pairs are external (V
. Each pair contains a positive reference which must be between the
and V
BGH
and V
ALTL
) voltage reference pair may select additional external pins
SSAD
BGL
). These voltage references are selected using the
.
REFL
SSAD
DDAD
. If externally available, connect the ground
REFH
)
, and a ground reference which must be
and V
Analog-to-Digital Converter (S08ADC16)
REFL
), alternate (V
ALTH
and
21-7