參數(shù)資料
型號(hào)： MCF5484CZP200
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 200 MHz, RISC PROCESSOR, PBGA388
封裝： 27 X 27 MM, 1 MM PITCH, PLASTIC, MS-034AAL-1, BGA-388
文件頁(yè)數(shù)： 25/96頁(yè)
文件大小： 2006K
代理商： MCF5484CZP200
MOTOROLA
MCF548x Integrated Microprocessor Hardware Specifications
31
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Signal Description
1.5.1.2.4
SDRAM Row Address Strobe (RAS)
This output is the SDRAM synchronous row address strobe.
1.5.1.2.5
SDRAM Column Address Strobe (CAS)
This output is the SDRAM synchronous column address strobe.
1.5.1.2.6
SDRAM Chip Selects (SDCS[3:0])
These signals interface to the chip select lines of the SDRAMs within a memory block. Thus, there is one
SDCS line for each memory block (the MCF548x supports up to four SDRAM memory blocks).
1.5.1.2.7
SDRAM Write Data Byte Mask (SDDM[3:0])
These output signals are sampled by the SDRAM on both edges of SDDQS to determine which byte lanes
of the SDRAM data bus should be latched during a write cycle. In DDR mode, these bits are ignored during
read operations.
1.5.1.2.8
SDRAM Data Strobe (SDDQS[3:0])
These bidirectional signals indicate when valid data is on the SDRAM data bus when in DDR mode.
1.5.1.2.9
SDRAM Clock (SDCLK[1:0])
These signals are the output clock for SDRAM cycles.
1.5.1.2.10 Inverted SDRAM Clock (SDCLK[1:0])
These signals are the inverted version of the SDRAM clock. They are used with SDCLK to provide the
differential clocks for DDR SDRAM.
1.5.1.2.11 SDRAM Write Enable (SDWE)
The SDRAM write enable (SDWE) is asserted to signify that an SDRAM write cycle is underway. A read
cycle is indicated by the negation of SDWE.
1.5.1.2.12 SDRAM Clock Enable (SDCKE)
This output is the SDRAM clock enable. SDCKE is negated to put the SDRAM into low-power, self-refresh
mode.
1.5.1.2.13 SDR SDRAM Data Strobe (SDRDQS)
This signal is connected to SDDQS inputs. Used in SDR mode only.
1.5.1.2.14 SDRAM Reference Voltage (VREF)
Output reference voltage for differential SSTL_2 inputs. Used in both DDR and SDR modes.
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MCF548X 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MCF548x ColdFire㈢ Microprocessor
MCF548X_07 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MCF548x ColdFire㈢ Microprocessor
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