MCF5253CVM140 Freescale Semiconductor, MCF5253CVM140 Datasheet - Page 119

• Manufacturer Part Number: MCF5253CVM140
• Description: IC MPU 32BIT 140MHZ 225-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF525xr

Specifications of MCF5253CVM140

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 140MHz
• Connectivity: CAN, EBI/EMI, I²C, QSPI, UART/USART, USB OTG
• Peripherals: DMA, WDT
• Program Memory Type: ROMless
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Data Converters: A/D 6x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 225-MAPBGA
• Family Name: MCF5xxx
• Device Core: ColdFire V2
• Device Core Size: 32b
• Frequency (max): 140MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.2/3.3V
• Operating Supply Voltage (max): 1.32/3.6V
• Operating Supply Voltage (min): 1.08/3V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 225
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Compliant

7.4.6
Self-refresh is a method of allowing the SDRAM to enter into a low-power state, while at the same time
to perform an internal refresh operation and to maintain the integrity of the data stored in the SDRAM. The
DRAM controller supports self-refresh with DCR[IS]. When IS is set, the
SDRAM. When IS is cleared, the
self-refresh operation.
Freescale Semiconductor
(DCR[COC] = 0)
SDRAS
SDCAS
SD_CS
A[31:0]
SDWE
BCLK
BCLKE
SD_CS0
SDRAS
SDCAS
SDWE
Self-Refresh Operation
BCLK
PALL
PALL
t
RCD
t
NOP
NOP
RCD
= 2
= 2
SELFX
SELF
Figure 7-10. Auto-Refresh Operation
Figure 7-11. Self-Refresh Operation
REF
MCF5253 Reference Manual, Rev. 1
command is sent to the DRAM controller.
Refresh
Active
Self-
SELFX
t
NOP
RC
= 6
t
RC
= 6
NOP
Synchronous DRAM Controller Module
SELF
command is sent to the
Figure 7-11
ACTV
Possible
ACTV
First
shows the
7-15