MCF5307CFT66B Freescale Semiconductor, MCF5307CFT66B Datasheet - Page 266

• Manufacturer Part Number: MCF5307CFT66B
• Description: IC MPU 32BIT 66MHZ COLDF 208FQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF530xr

Specifications of MCF5307CFT66B

• Core Processor: Coldfire V3
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: EBI/EMI, I²C, UART/USART
• Peripherals: DMA, POR, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-FQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Synchronous Operation
11.4.4.6 Self-Refresh Operation
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
command is sent to the DRAM controller. Figure 11-23 shows the self-refresh operation.
(DCR[COC] = 0)
11-32
RAS[0] or [1]
RAS[0] or [1]
DRAMW
BCLKO
A[31:0]
DRAMW
BCLKO
SRAS
SCAS
SRAS
SCAS
SCKE
PALL
PALL
SELF
t
t
RCD
NOP
RCD
Freescale Semiconductor, Inc.
NOP
= 2
Figure 11-22. Auto-Refresh Operation
= 2
Figure 11-23. Self-Refresh Operation
command is sent to the SDRAM. When IS is cleared, the
For More Information On This Product,
SELF
REF
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MCF5307 User’s Manual
Active
Self-
SELFX
t
RC
NOP
t
RC
= 6
= 6
NOP
Possible
ACTV
ACTV
First
SELFX