MCF5280CVM66J Freescale Semiconductor, MCF5280CVM66J Datasheet - Page 86
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MCF5280CVM66J
Manufacturer Part Number
MCF5280CVM66J
Description
IC MPU RISC 66MHZ 256-MAPBGA
Manufacturer
Freescale Semiconductor
Series
MCF528xr
Datasheet
1.MCF5216CVM66J.pdf
(766 pages)
Specifications of MCF5280CVM66J
Core Processor
Coldfire V2
Core Size
32-Bit
Speed
66MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, SPI, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
150
Program Memory Type
ROMless
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
256-MAPBGA
Processor Series
MCF528x
Core
ColdFire V2
3rd Party Development Tools
JLINK-CF-BDM26, EWCF
Development Tools By Supplier
NNDK-MOD5282-KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCF5280CVM66J
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Enhanced Multiply-Accumulate Unit (EMAC)
3.3
The MAC speeds execution of ColdFire integer-multiply instructions (MULS and MULU) and provides
additional functionality for multiply-accumulate operations. By executing MULS and MULU in the MAC,
execution times are minimized and deterministic compared to the 2-bit/cycle algorithm with early
termination that the OEP normally uses if no MAC hardware is present.
The added MAC instructions to the ColdFire ISA provide for the multiplication of two numbers, followed
by the addition or subtraction of the product to or from the value in an accumulator. Optionally, the product
may be shifted left or right by 1 bit before addition or subtraction. Hardware support for saturation
arithmetic can be enabled to minimize software overhead when dealing with potential overflow conditions.
Multiply-accumulate operations support 16- or 32-bit input operands in these formats:
The EMAC is optimized for single-cycle, pipelined 32 × 32 multiplications. For word- and
longword-sized integer input operands, the low-order 40 bits of the product are formed and used with the
destination accumulator. For fractional operands, the entire 64-bit product is calculated and truncated or
rounded to the most-significant 40-bit result using the round-to-nearest (even) method before it is
combined with the destination accumulator.
For all operations, the resulting 40-bit product is extended to a 48-bit value (using sign-extension for
signed integer and fractional operands, zero-fill for unsigned integer operands) before being combined
with the 48-bit destination accumulator.
3-8
•
•
•
ACC2U
ACC3U
ACC2L
ACC3L
31–24
23–16
Field
15–8
7–0
Signed integers
Unsigned integers
Signed, fixed-point, fractional numbers
Reset – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
BDM: 0x808 (ACCext23)
Functional Description
W
R
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Accumulator 2 upper extension byte
Accumulator 2 lower extension byte
Accumulator 3 upper extension byte
Accumulator 3 lower extension byte
ACC2U
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Figure 3-6. Accumulator Extension Register (ACCext23)
Table 3-7. ACCext23 Field Descriptions
ACC2L
Description
ACC3U
8
7
Access: User read/write
6
Freescale Semiconductor
5
ACC3L
BDM read/write
4
3
2
1
0
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