MCF51EM256CLK Freescale Semiconductor, MCF51EM256CLK Datasheet - Page 259

• Manufacturer Part Number: MCF51EM256CLK
• Description: IC MCU 32BIT 256KB FLASH 80LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLK

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 56
• 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 12x16b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-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

11.1.7
Key features of the ICS module are:
11.1.8
Figure 11-6
Freescale Semiconductor
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Frequency-locked loop (FLL) is trimmable for accuracy
Internal or external reference clocks can be used to control the FLL
Reference divider is provided for external clock
Internal reference clock has 9 trim bits available
Internal or external reference clocks can be selected as the clock source for the MCU
Whichever clock is selected as the source can be divided down
— 2-bit select for clock divider is provided
Control signals for a low power oscillator clock generator (OSCOUT) as the ICS external reference
clock are provided
— HGO, RANGE, EREFS, ERCLKEN, EREFSTEN
FLL Engaged Internal mode is automatically selected out of reset
BDC clock is provided as a constant divide by 2 of the low range DCO output
Three selectable digitally-controlled oscillators (DCO) optimized for different frequency ranges.
Option to maximize output frequency for a 32768 Hz external reference clock source.
– Allowable dividers are: 1, 2, 4, 8
Features
Block Diagram
is the ICS block diagram.
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Internal Clock Source (ICS)
11-5