MCF5272CVF66J Freescale Semiconductor, MCF5272CVF66J Datasheet - Page 106

• Manufacturer Part Number: MCF5272CVF66J
• Description: IC MCU 166MHZ 196MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5272CVF66J

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, UART/USART, USB
• Peripherals: DMA, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (4K x 32)
• Program Memory Type: ROM
• Ram Size: 1K x 32
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 196-MAPBGA
• Processor Series: MCF527x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: NNDK-MOD5272-KIT, NNDK-MOD5270-KIT
• Leaded Process Compatible: No
• Rohs Compliant: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: No

Local Memory
The mapping of a given access into the SRAM uses the following algorithm to determine if the access hits
in the memory:
if (RAMBAR[0] = 1)
4.3.2.2
After a hardware reset, the contents of the SRAM module are undefined. The valid bit of RAMBAR is
cleared, disabling the module. If the SRAM needs to be initialized with instructions or data, the following
steps should be performed:
The ColdFire processor or an external BDM emulator using the debug module can perform this
initialization.
4.3.2.3
Depending on the configuration defined by RAMBAR, instruction fetch accesses can be sent to the SRAM
module, ROM module, and instruction cache simultaneously. If the access is mapped to the SRAM
module, it sources the read data, discarding the instruction cache access. If the SRAM is used only for data
operands, setting RAMBAR[SC,UC] lowers power dissipation by disabling the SRAM during all
instruction fetches. Additionally, if the SRAM holds only instructions, setting RAMBAR[SD,UD] reduces
power dissipation.
Consider the examples on
4-4
1. Load RAMBAR, mapping the SRAM module to the desired location.
2. Read the source data and write it to the SRAM. Various instructions support this function,
3. After data is loaded into the SRAM, it may be appropriate to load a revised value into RAMBAR
including memory-to-memory MOVE instructions and the MOVEM opcode. The MOVEM
instruction is optimized to generate line-sized burst fetches on 0-modulo-16 addresses, so this
opcode generally provides the best performance.
with new write-protect and address space mask attributes. These attributes consist of the
write-protect and address-space mask fields.
if (requested address[31:12] = RAMBAR[31:12])
SRAM Initialization
Programming RAMBAR for Power Management
if (address space mask of the requested type = 0)
MCF5272 ColdFire
Table 4-3
Table 4-3. Examples of Typical RAMBAR Settings
Access is mapped to the SRAM module
if (access = read)
if (access = write)
Instructions only
Data only
Both instructions and data
Data Contained in SRAM RAMBAR[7–0]
of typical RAMBAR settings:
®
Read the SRAM and return the data
if (RAMBAR[8] = 0)
else Signal a write-protect access error
Integrated Microprocessor User’s Manual, Rev. 3
Write the data into the SRAM
0x2B
0x35
0x21
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