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CS8900A-IQ 参数 Datasheet PDF下载

CS8900A-IQ图片预览
型号: CS8900A-IQ
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  
After a reset, the ISA bus outputs INTRx and  
DMARQx are 3-Stated, thus avoiding any interrupt  
or DMA channel conflicts on the ISA bus at power-  
up time.  
PacketPage Register  
Register Descriptions  
Address  
Contents  
0020h  
0300h  
I/O Base Address*  
0022h  
XXXX XXXX Interrupt Number  
XXXX X100  
3.3.4 Initialization  
After each reset (except EEPROM Reset), the  
CS8900A checks the sense of the EEDataIn pin to  
see if an external EEPROM is present. If EEDI is  
high, an EEPROM is present and the CS8900A au-  
tomatically loads the configuration data stored in  
the EEPROM into its internal registers (see next  
section). If EEDI is low, an EEPROM is not  
present and the CS8900A comes out of reset with  
the default configuration shown in Table 3.  
0024h  
0026h  
XXXX XXXX DMA Channel  
XXXX XX11  
0000h  
DMA Start of Frame  
Offset  
0028h  
002Ah  
002Ch  
0030h  
X000h  
0000h  
DMA Frame Count  
DMA Byte Count  
XXX0 0000h Memory Base Address  
XXX0 0000h Boot PROM Base  
Address  
A low-cost serial EEPROM can be used to store  
configuration information that is automatically  
loaded into the CS8900A after each reset (except  
EEPROM reset). The use of an EEPROM is op-  
tional.  
0034h  
XXX0 0000h Boot PROM Address  
Mask  
0102h  
0104h  
0106h  
0108h  
010Ah  
010Ch  
010Eh  
0110h  
0112h  
0114h  
0116h  
0118h  
0003h  
Register 3 - RxCFG  
Register 5 - RxCTL  
Register 7 - TxCFG  
Register 9 - TxCMD  
Register B - BufCFG  
Reserved  
0005h  
0007h  
0009h  
The CS8900A operates with any of six standard  
EEPROM’s shown in Table 4.  
000Bh  
Undefined  
Undefined  
Undefined  
00013h  
0015h  
Reserved  
Reserved  
Register 13 - LineCTL  
Register 15 - SelfCTL  
Register 17 - BusCTL  
Register 19 - TestCTL  
0017h  
0019h  
* I/O base address is unaffected by Software Suspend mode.  
Table 3. Default Configuration  
EEPROM Type  
‘C46 (non-sequential)  
‘CS46 (sequential)  
‘C56 (non-sequential)  
‘CS56 (sequential)  
‘C66 (non-sequential)  
‘CS66 (sequential)  
Size (16-bit words)  
64  
64  
128  
128  
256  
256  
Table 4. Supported EEPROM Types  
CIRRUS LOGIC PRODUCT DATA SHEET  
20  
DS271PP3  
 
 
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