參數(shù)資料
型號(hào): MCF5307CAI66B
廠商: Freescale Semiconductor
文件頁(yè)數(shù): 184/484頁(yè)
文件大?。?/td> 0K
描述: IC MPU 32BIT 66MHZ COLDF 208FQFP
標(biāo)準(zhǔn)包裝: 24
系列: MCF530x
核心處理器: Coldfire V3
芯體尺寸: 32-位
速度: 66MHz
連通性: EBI/EMI,I²C,UART/USART
外圍設(shè)備: DMA,POR,WDT
輸入/輸出數(shù): 16
程序存儲(chǔ)器類(lèi)型: ROMless
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 208-BFQFP
包裝: 托盤(pán)
11-30
MCF5307 User’s Manual
Synchronous Operation
Because of the nature of the internal CPU pipeline this condition does not occur
often; however, the use of continuous page mode is recommended because it can
provide a slight performance increase.
Figure 11-20 shows two read accesses in continuous page mode. Note that there is no
precharge between the two accesses. Also notice that the second cycle begins with a read
operation with no ACTV command.
Figure 11-20. Synchronous, Continuous Page-Mode Access—Consecutive Reads
Figure 11-21 shows a write followed by a read in continuous page mode. Because the bus
cycle is terminated with a WRITE command, the second cycle begins sooner after the write
than after the read. A read requires data to be returned before the bus cycle can terminate.
Note that in continuous page mode, secondary accesses output the column address only.
A[31:0]
SRAS
SCAS
DRAMW
D[31:0]
ACTV
NOP
READ
NOP
RAS[0] or [1]
CAS[3:0]
READ
NOP
PALL
tCASL = 2
tRCD = 2
tCASL = 2
tEP
Row
Column
BCLKO
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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