MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 223

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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Manufacturer
Quantity
Price
Part Number:
MCF51EM256CLL
Manufacturer:
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Quantity:
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Part Number:
MCF51EM256CLL
Manufacturer:
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Quantity:
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Chapter 9
Multiply-Accumulate Unit (MAC)
9.1
This chapter describes the functionality, microarchitecture, and performance of the multiply-accumulate
(MAC) unit in the ColdFire family of processors.
9.1.1
The MAC design provides a set of DSP operations that can improve the performance of embedded code
while supporting the integer multiply instructions of the baseline ColdFire architecture.
The MAC provides functionality in three related areas:
The MAC features a three-stage execution pipeline optimized for 16-bit operands, with a 16x16 multiply
array and a single 32-bit accumulator.
The three areas of functionality are addressed in detail in following sections. The logic required to support
this functionality is contained in a MAC module
9.1.1.1
The MAC is an extension of the basic multiplier in most microprocessors. It is typically implemented in
hardware within an architecture and supports rapid execution of signal processing algorithms in fewer
Freescale Semiconductor
1. Signed and unsigned integer multiplication
2. Multiply-accumulate operations supporting signed and unsigned integer operands as well as
3. Miscellaneous register operations
signed, fixed-point, and fractional operands
Introduction
Overview
Introduction to the MAC
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Figure 9-1. Multiply-Accumulate Functionality Diagram
Operand Y
Accumulator(s)
Shift 0,1,-1
(Figure
+ / -
X
9-1).
Operand X
9-1

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