MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 100

• Manufacturer Part Number: MCF5270CAB100
• Description: MCU V2 COLDFIRE 64K SRAM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5270CAB100

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 160-QFP
• Processor Series: MCF527x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: NNDK-MOD5272-KIT, NNDK-MOD5270-KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Enhanced Multiply-Accumulate Unit (EMAC)
Thus, the 48-bit accumulator definition is a function of the EMAC operating mode. Given that
each 48-bit accumulator is the concatenation of 16-bit accumulator extension register (ACCextn)
contents and 32-bit ACCn contents, the specific definitions are as follows:
if MACSR[6:5] == 00/* signed integer mode */
4-4
Complete Accumulator[47:0] = {ACCextn[15:0], ACCn[31:0]}
Extended Product
Product
Accumulator
Extended Product
+
Accumulator
Product
Figure 4-5. Signed and Unsigned Integer Alignment
+
Extension Byte Upper [7:0]
Extension Byte Upper [7:0]
40
X
Figure 4-4. Fractional Alignment
24
X
MCF5271 Reference Manual, Rev. 2
OperandY
OperandX
OperandY
OperandX
8
8
Extension Byte Lower [7:0]
8
8
40
40
8
8
8
Accumulator [31:0]
32
32
32
32
32
32
32
23
Accumulator [31:0]
Extension Byte Lower [7:0]
8
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