MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 133

• 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

6.2.4
As noted previously, depending on the configuration defined by the RAMBAR, instruction fetch
and operand read accesses may be sent to the SRAM and cache simultaneously. If the access is
mapped to the SRAM module, it sources the read data and the unified cache access is discarded.
If the SRAM is used only for data operands, setting the ASn bits associated with instruction fetches
can decrease power dissipation. Additionally, if the SRAM contains only instructions, masking
operand accesses can reduce power dissipation.
RAMBAR settings.
Freescale Semiconductor
Power Management
Table 6-2. Typical RAMBAR Setting Examples
Both Instructions And Data
Data Contained in SRAM
Instruction Only
Data Only
MCF5271 Reference Manual, Rev. 2
Table 6-2
RAMBAR[7:0]
0x2B
0x35
0x21
shows some examples of typical
Register Description
6-5