MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 167

• 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

Chapter 7
Resets, Interrupts, and General System Control
7.1
This section discusses basic reset and interrupt mechanisms and the various sources of reset and interrupt
on an MCF51EM256 series microcontroller. Some interrupt sources from peripheral modules are
discussed in greater detail within other sections of this document. This section gathers basic information
about all reset and interrupt sources in one place for easy reference. A few reset and interrupt sources,
including the computer operating properly (COP) watchdog are not part of on-chip peripheral systems with
their own chapters.
7.2
Reset and interrupt features include:
7.3
Resetting the microcontroller provides a way to start processing from an known set of initial conditions.
When the ColdFire processor exits reset, it fetches initial 32-bit values for the supervisor stack pointer and
program counter from locations 0x(00)00_0000 and 0x(00)00_0004 respectively. On-chip peripheral
modules are disabled and I/O pins are initially configured as general-purpose high-impedance inputs with
pullup devices disabled.
The MCF51EM256 series microcontrollers have the following sources for reset:
Each of these sources, with the exception of the background debug forced reset, has an associated bit in
the system reset status register (SRS).
Freescale Semiconductor
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Multiple sources of reset for flexible system configuration and reliable operation
System reset status (SRS) register to indicate source of most recent reset
Separate interrupt vector for most modules (reduces polling overhead) (see
Power-on reset (POR)
External pin reset (PIN)
Computer operating properly (COP) timer
Illegal opcode detect (ILOP)
Illegal address detect (ILAD)
Low-voltage detect (LVD)
Background debug forced reset
Introduction
Features
Microcontroller Reset
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Table
7-1)
7-1