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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  
host memory. Preceding the frame data are the  
contents of the RxStatus register (PacketPage  
base + 0400h) and the RxLength register (Pack-  
etPage base + 0402h).  
contents of the target register is then mapped into  
the PacketPage Data Port (I/O base + 000Ch).  
If the host needs to access a sequential block of reg-  
isters, the MSB of the PacketPage address of the  
first word to be accessed should be set to "1". The  
PacketPage Pointer will then move to the next word  
location automatically, eliminating the need to set-  
up the PacketPage Pointer between successive ac-  
cesses (see Figure 18).  
For a more detailed description of receive, see  
Section 5.2 on page 79.  
4.10.10 Accessing Internal Registers  
To access any of the CS8900As internal registers  
in I/O Mode, the host must first setup the Pack-  
etPage Pointer. It does this by writing the Pack-  
etPage address of the target register to the  
PacketPage Pointer Port (I/O base + 000Ah). The  
4.10.11 Polling the CS8900A in I/O Mode  
If interrupts are not used, the host can poll the  
CS8900A to check if receive frames are present  
and if memory space is available for transmit.  
CIRRUS LOGIC PRODUCT DATA SHEET  
78  
DS271PP3  
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