MCF5307AI90B Freescale Semiconductor, MCF5307AI90B Datasheet - Page 94

• Manufacturer Part Number: MCF5307AI90B
• Description: IC MPU 32BIT COLDF 90MHZ 208FQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF530xr

Specifications of MCF5307AI90B

• Core Processor: Coldfire V3
• Core Size: 32-Bit
• Speed: 90MHz
• Connectivity: EBI/EMI, I²C, UART/USART
• Peripherals: DMA, POR, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 208-FQFP
• Maximum Clock Frequency: 90 MHz
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 90MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 208
• Package Type: FQFP
• Program Memory Size: 8KB
• Cpu Speed: 90MHz
• Embedded Interface Type: I2C, UART
• Digital Ic Case Style: FQFP
• No. Of Pins: 208
• Supply Voltage Range: 3V To 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Overview
The MAC unit is an extension of the basic multiplier found on most microprocessors. It can
perform operations native to signal processing algorithms in an acceptable number of
cycles, given the application constraints. For example, small digital filters can tolerate some
variance in the execution time of the algorithm; larger, more complicated algorithms such
as orthogonal transforms may have more demanding speed requirements exceeding the
scope of any processor architecture and requiring a fully developed DSP implementation.
The M68000 architecture was not designed for high-speed signal processing, and a large
DSP engine would be excessive in an embedded environment. In striking a middle ground
between speed, size, and functionality, the ColdFire MAC unit is optimized for a small set
of operations that involve multiplication and cumulative additions. Specifically, the
multiplier array is optimized for single-cycle, 16 x 16 multiplies producing a 32-bit result,
with a possible accumulation cycle following. This is common in a large portion of signal
processing applications. In addition, the ColdFire core architecture has been modified to
allow for an operand fetch in parallel with a multiply, increasing overall performance for
certain DSP operations.
3.1.1 MAC Programming Model
Figure 3-2 shows the registers in the MAC portion of the user programming model.
3-2
31
Figure 3-1. ColdFire MAC Multiplication and Accumulation
Freescale Semiconductor, Inc.
Figure 3-2. MAC Programming Model
For More Information On This Product,
Operand Y
Go to: www.freescale.com
MCF5307 User’s Manual
0
MACSR
ACC
MASK
Accumulator
Shift 0,1,-1
+/-
X
Operand X
MAC status register
MAC accumulator
MAC mask register