MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 210

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

Specifications of MCF5272VF66

• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Not Compliant

SDRAM Controller
9.10.3
Figure 9-13
SDRAM writes all of its on-chip RAM page buffers into the SDRAM array. SDTR[RP] determines the
number of dead cycles after a precharge. Note that self refresh occurs during T3. In refresh state, SDRAM
cannot accept any other command.
9-20
A10_PRECHG
SDADR[13:0]
SDBA[1:0]
SDCLKE
SDCLK
SDWE
SDCS
SDRAM Refresh Timing
RAS0
CAS0
shows refresh-cycle timing. As in
(H)
MCF5272 ColdFire
T0
Precharge
All Banks
T1
Figure 9-13. SDRAM Refresh Cycle
®
T2
Integrated Microprocessor User’s Manual, Rev. 3
NOP
Figure
T3
Refresh
Auto
9-14, during a
T4
T5
PRECHARGE ALL
T6
t
RC
T7
Freescale Semiconductor
command (T1), the
Next Command
T8
T9