MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 191

• 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

Chapter 9
SDRAM Controller
This chapter describes configuration and operation of the synchronous DRAM controller component of
the SIM including a general description of signals involved in SDRAM operations. It provides interface
information for memory configurations using most common SDRAM devices for both 16- and 32-bit wide
data buses. The chapter concludes with signal timing diagrams.
9.1
The MCF5272 incorporates an SDRAM controller, whose main features are as follows:
9.2
The SDRAM controller provides all required signals for glueless interfacing to a variety of
JEDEC-compliant SDRAM devices. RAS/CAS address multiplexing and the SDRAM pin A10
auto-precharge function is software configurable for different page sizes. To maintain refresh capability
without conflicting with concurrent accesses on the address and data buses, RAS0, CAS0, SDWE,
SDBA[0:1], SDCLKE, A10_PRECHG, and the SDRAM bank selects are dedicated SDRAM signals.
Figure 9-1
Freescale Semiconductor
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Glueless interface to a variety of JEDEC-compliant SDRAM devices.
MCF5272 data bus width of 16 or 32 bits to SDRAM memory array
16- to 256-Mbit device support
Dedicated bank address pins to provide pin out compatibility for different SDRAM sizes with a
single printed circuit board layout
Page size from 256–1024 column address locations
6-1-1-1 timing for burst-read; 3-1-1-1 timing for burst-write accesses (assuming a page hit at 66
MHz)
CAS latencies of 1 and 2
Up to four concurrently activated banks
SDRAM power down and self refresh
Refresh timer prescaler supports system clock down to 5 MHz maintaining a 15.6-µS refresh cycle
Auto initialization of SDRAM
Overview
SDRAM Controller Signals
shows the SDRAM controller signal configuration.
MCF5272 ColdFire
®
Integrated Microprocessor User’s Manual, Rev. 3
9-1