MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 210

IC MCU 32BIT 256KB FLASH 100LQFP

MCF51EM256CLL

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

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

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
MCF51EM256CLL
Manufacturer:
FREESCALE
Quantity:
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Part Number:
MCF51EM256CLL
Manufacturer:
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Quantity:
10 000
ColdFire Core
The selection of the format value provides some limited debug support for porting code from M68000
applications. On M68000 family processors, the SR was located at the top of the stack. On those
processors, bit 30 of the longword addressed by the system stack pointer is typically zero. Thus, if an RTE
is attempted using this old format, it generates a format error on a ColdFire processor.
If the format field defines a valid type, the processor: (1) reloads the SR operand, (2) fetches the second
longword operand, (3) adjusts the stack pointer by adding the format value to the auto-incremented address
after the fetch of the first longword, and then (4) transfers control to the instruction address defined by the
second longword operand within the stack frame.
8.3.3.10
The TRAP #n instruction always forces an exception as part of its execution and is useful for implementing
system calls. The TRAP instruction may be used to change from user to supervisor mode.
This set of 16 instructions provides a similar but expanded functionality compared to the S08’s SWI
(software interrupt) instruction. Do not confuse these instructions and their functionality with the
software-scheduled interrupt requests, which are handled like normal I/O interrupt requests by the
interrupt controller. The processing of the software-scheduled IRQs can be masked, based on the interrupt
priority level defined by the SR[I] field.
8.3.3.11
If execution of a valid instruction is attempted but the required hardware is not present in the processor, an
unsupported instruction exception is generated. The instruction functionality can then be emulated in the
exception handler, if desired.
All ColdFire cores record the processor hardware configuration in the D0 register immediately after the
negation of RESET. See
For this device, attempted execution of valid integer divide opcodes and CAU instructions result in the
unsupported instruction exception.
8.3.3.12
Interrupt exception processing includes interrupt recognition and the fetch of the appropriate vector from
the interrupt controller using an IACK cycle or using the previously-supplied vector number, under control
of CPUCR[IAE]. See
controller.
8.3.3.13
The default operation of the V1 ColdFire processor is the generation of an illegal address reset event if a
fault-on-fault halt condition is detected. If CPUCR[ARD] is set, the reset is disabled and the processor is
halted as detailed below.
If a ColdFire processor encounters any type of fault during the exception processing of another fault, the
processor immediately halts execution with the catastrophic fault-on-fault condition. A reset is required to
to exit this state.
8-18
TRAP Instruction Exception
Unsupported Instruction Exception
Interrupt Exception
Fault-on-Fault Halt
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Chapter 10, “Interrupt Controller (CF1_INTC),”
Section 8.3.3.14, “Reset Exception,”
for details.
for details on the interrupt
Freescale Semiconductor

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