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CS8900A-IQ3 参数 Datasheet PDF下载

CS8900A-IQ3图片预览
型号: CS8900A-IQ3
PDF下载: 下载PDF文件 查看货源
内容描述: 水晶局域网? ISA以太网控制器 [Crystal LAN ⑩ ISA Ethernet Controller]
分类和应用: 控制器局域网以太网
文件页数/大小: 128 页 / 1360 K
品牌: CIRRUS [ CIRRUS LOGIC ]
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CS8900A  
Crystal LAN™ ISA Ethernet Controller  
Enter Packet Transmit Process  
Is  
TxCMD  
pending?  
Exit: can’t Issue command  
Yes  
Note: Issuing a command  
at this point will cause  
previous transmit frame  
to be lost.  
No  
Host Writes Transmit Command  
to the TxCMD Register  
Host Writes Transmit Frame  
Length to the TxLength Register  
Transmit Request  
Host Reads the BusST  
Register (Register 18)  
Rdy4  
No  
Polling Loop  
TxNOW  
bit = 1?  
Yes  
CS8900A Commits  
Buffer Space to  
Transmit Frame  
Host Writes  
Transmit Frame  
to CS8900A  
CS8900A  
Transmits Frame  
Exit Transmit Process  
Figure 30. Transmit Operation in Polling Mode  
mode). If the transmit length is erroneous, the  
command is discarded and the TxBidErr, bit 7,  
in BusST register is set.  
3) The host reads the BusST register. This read is  
performed in memory mode by reading Regis-  
ter 18, at memory base + 0138h. In I/O mode,  
the host must first set the PacketPage Pointer at  
CIRRUS LOGIC PRODUCT DATA SHEET  
102  
DS271PP3  
 
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