MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 113

• 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

disabled (PTxSE[n] = 0), low drive strength selected (PTxDS[n] = 0), and internal pullups disabled
(PTxPE[n] = 0). Two exceptions to this are the RESETB and BKGD/MS pins, which have pullups enabled
at reset.
4.1.5.2
The RESETB is an open drain device, and cannot be programmed to an active high.
4.1.5.3
PTB3 and PTB1 pins have twice the output drive capability of other digital pins, and can source 15 to
20 mA. This allows you to interface SCI1 and SCI2 TX pins (which can mapped to these ports) directly
to opto-isolators.
4.1.5.4
PTE4, PTE5 and PTE6 are open drain devices. These pins do not include active pullup capability (although
they do have input pullups when used as input functions). The intention here is to allow the device to
interface (via off-chip pullup resistors) to 5 V logic. PTE4 can be programmed to MISO3 or MOSI3. PTE5
can be programmed to SCLK3. PTE6 can be programmed as SS3 or TX2.
Freescale Semiconductor
RESETB
High Drive Outputs
Open Drain Outputs
Not all general-purpose I/O pins are available on all packages. To avoid
extra current drain from floating input pins, the user’s reset initialization
routine in the application program must either enable on-chip pullup devices
or change the direction of unconnected pins to outputs so the pins do not
float.
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
NOTE
Parallel Input/Output Control
4-3