MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 235

• 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

Freescale Semiconductor
if (MACSR.OMC == 0 || MACSR.V == 0)
then {
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
MACSR.V = 0
/* select the input operands */
if (sz == word)
/* perform the multiply */
product[63:0] = operandY[31:0] * operandX[31:0]
/* check for product overflow */
if (product[63:32] != 0x0000_0000)
/* scale product before combining with accumulator */
switch (SF)
{
}
/* combine with accumulator */
if (MACSR.V == 0)
then {if (U/Ly == 1)
}
else {operandY[31:0] = Ry[31:0]
}
then {
}
case 2:
case 3:
case 0:
case 1:
break;
if (product[31] == 1)
break;
break;
product[31:0] = {0, product[31:1]}
break;
if (U/Lx == 1)
operandX[31:0] = Rx[31:0]
MACSR.V = 1
if (inst == MSAC && MACSR.OMC == 1)
then {MACSR.V = 1
}
else product[31:0] = {product[30:0], 0}
then operandY[31:0] = {0x0000, Ry[31:16]}
else operandY[31:0] = {0x0000, Ry[15:0]}
then operandX[31:0] = {0x0000, Rx[31:16]}
else operandX[31:0] = {0x0000, Rx[15:0]}
then result[31:0] = 0x0000_0000
else if (MACSR.OMC == 1)
/* 2-bit scale factor */
/* no scaling specified */
/* SF = “<< 1” */
if (inst == MSAC && MACSR.OMC == 1)
/* reserved encoding */
/* SF = “>> 1” */
/* product overflow */
then result[31:0] = 0x0000_0000
else if (MACSR.OMC == 1)
then /* overflowed MAC,
result[31:0] = 0xffff_ffff
then /* overflowed MAC,
saturationMode enabled */
result[31:0] = 0xffff_ffff
saturationMode enabled */
Multiply-Accumulate Unit (MAC)
9-13