參數(shù)資料
型號: MC68EN302AG20BT
廠商: Freescale Semiconductor
文件頁數(shù): 5/8頁
文件大?。?/td> 0K
描述: IC MPU MULTI-PROTOCOL 144-LQFP
產(chǎn)品變化通告: NPD Devices Discontinuation 24/Aug/2012
標(biāo)準(zhǔn)包裝: 60
系列: M683xx
處理器類型: M683xx 32-位
速度: 20MHz
電壓: 5V
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
包裝: 托盤
產(chǎn)品目錄頁面: 733 (CN2011-ZH PDF)
MC68EN302 PRODUCT INFORMATION
Programmable refresh period and pre-charge period
RAS lines are separate from the four chip selects
Refresh hidden from bus accesses
Write protect option
Each bank programmable size from 128Kbytes to 8Mbytes
Figure 4. DRAM Controller
MC68EN302 APPLICATIONS
The MC68EN302 is intended for low-end bridge and router applications. It has the three SCCs from the
MC68302, plus an additional Ethernet interface giving it a total of four serial interfaces.
Since the MC68EN302 has both the three SCCs as well as an Ethernet interface, it would be an excellent
choice in an ISDN to Ethernet router.
For remote access dial-in, the MC68EN302 could be used in a dial-up modem that would connect to an
Ethernet LAN.
Low End Bridges
ADDRESS 23–ADDRESS 0
BLOCKHIT0
BLOCKHIT1
ADDRESS
MULTIPLEXING
DRAM ADDRESS
ADDRESS
DECODE
CLK
RFRESH
TIMER
RAS/CAS
GENERATION
AMUX
RAS1, RAS0
CAS1, CAS0
DRAM_RW
AS
UDS
LDS
R/W
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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