参数资料
型号: MC68EN302CAG20BT
厂商: Freescale Semiconductor
文件页数: 5/8页
文件大小: 0K
描述: IC MPU NETWORK 20MHZ 144-LQFP
标准包装: 60
系列: M683xx
处理器类型: M683xx 32-位
速度: 20MHz
电压: 5V
安装类型: 表面贴装
封装/外壳: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
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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