MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 55

• 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

2.2.7
V
ADC modules. A 0.1 μF ceramic bypass capacitor must be located as near to the ADC reference pins as
practical to suppress high-frequency noise.
2.2.8
The MCF51EM256 series microcontrollers support up to 48 general-purpose I/O pins (including one
output-only pin), which are shared with on-chip peripheral functions (timers, serial I/O, ADC, etc.).
When a port pin is configured as a general-purpose output or a peripheral uses the port pin as an output,
software can select one of the two drive strengths and enable or disable slew rate control.
When a port pin is configured as a general-purpose input or a peripheral uses the port pin as an input,
software can enable a pullup device. Pad cells on these devices also include an optional low pass filter in
the inputs. Again, this can be enabled via software control.
Immediately after reset, all of these pins (excluding the BKGD/MS pin) are configured as high-impedance
general-purpose inputs with internal pullup devices disabled.
When an on-chip peripheral system is controlling a pin, data direction control bits still determine what is
read from the port data registers, even though the peripheral controls the pin direction via the pin’s output
buffer enable. For information about controlling these pins as general-purpose I/O pins, see
“Parallel Input/Output
Freescale Semiconductor
REFH
and V
ADC Reference Pins (V
General-Purpose I/O and Peripheral Ports
REFL
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
are the voltage reference high and voltage reference low inputs, respectively, for the
Control.”
REFH
, V
REFL
)
Pins and Connections
“Chapter 4,
2-23