MCF5282CVM66 Freescale, MCF5282CVM66 Datasheet - Page 84

• Manufacturer Part Number: MCF5282CVM66
• Manufacturer: Freescale

Specifications of MCF5282CVM66

• Cpu Family: MCF528x
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Interface Type: CAN/I2C/QSPI/UART
• Total Internal Ram Size: 64KB
• # I/os (max): 150
• Number Of Timers - General Purpose: 12
• Operating Supply Voltage (typ): 3.3V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 256
• Package Type: MA-BGA
• Program Memory Type: Flash
• Program Memory Size: 512KB
• Lead Free Status / RoHS Status: Compliant

Enhanced Multiply-Accumulate Unit (EMAC)
The and operator enables the MASK use and causes bit 5 of the extension word to be set. The exact
algorithm for the use of MASK is:
if extension word, bit [5] = 1, the MASK bit, then
Here, oa is the calculated operand address and se_d16 is a sign-extended 16-bit displacement. For
auto-addressing modes of post-increment and pre-decrement, the updated An value calculation is also
shown.
Use of the post-increment addressing mode, {(An)+} with the MASK is suggested for circular queue
implementations.
3.2.3
The accumulator registers store 32-bits of the MAC operation result. The accumulator extension registers
form the entire 48-bit result.
3-6
31–16
MASK
Field
15–0
Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
BDM: 0x805 (MASK)
if <ea> = (An)
if <ea> = (An)+
if <ea> =-(An)
if <ea> = (d16,An)
W
R 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Accumulator Registers (ACC0–3)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Reserved, must be set.
Performs a simple AND with the operand address for MAC instructions.
oa
oa
An = (An + 4) and
oa
An = (An - 4) and
oa
=
=
= (An - 4) and
= (An + se_d16) and
An and
An
Table 3-4. MASK Field Descriptions
Figure 3-3. Mask Register (MASK)
{0xFFFF, MASK}
{0xFFFF, MASK}
{0xFFFF, MASK}
{0xFFFF, MASK}
{0xFFFF0x, MASK}
Description
MASK
8
7
Access: User read/write
6
Freescale Semiconductor
5
BDM read/write
4
3
2
1
0