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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  
exit from this mode, the SLEEP pin must be driven  
high. Upon exit, the CS8900A performs a complete  
To enter SW Suspend mode, the host must set the  
SWSuspend bit (Register 15, SelfCTL, bit 8). To  
reset, and then goes through a normal initialization exit SW Suspend, the host must write to the  
procedure.  
CS8900A’s assigned I/O space (the Write is only  
used to wake the CS8900A, the Write itself is ig-  
nored). Upon exit, the CS8900A performs a com-  
plete reset, and then goes through a normal  
initialization procedure.  
3.7.3 Software Suspend  
Software (SW) Suspend mode can be used to con-  
serve power in applications, like adapter cards, that  
do not have power management circuitry available.  
During this mode, all internal circuits are shut off  
except the I/O Base Address register (PacketPage  
base + 0020h) and the SelfCTL register (Register  
15).  
Any hardware reset takes the chip out of any sleep  
mode.  
Table 8 summarizes the operation of the three low-  
power modes.  
CS8900A Configuration  
CS8900A Operation  
SLEEP  
HWStandbyE  
HWSleepE  
SWSuspend  
(Pin 77) (SelfCTL, Bit A) (SelfCTL, Bit 9) (SelfCTL, Bit 8) Link Activity  
Low  
1
1
N/A  
Not Present HW Standby mode: 10BASE-T  
receiver listens for link activity  
Low  
Low  
1
0
1
1
1
N/A  
N/A  
0
Present  
N/A  
HW Standby mode: LANLED low  
HW Suspend mode  
Low to  
High  
N/A  
N/A  
CS8900A resets and goes through  
initialization  
High  
High  
Low  
Low  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
0
0
N/A  
N/A  
N/A  
N/A  
Not in low-power mode  
SW Suspend mode  
SW Suspend mode  
Not in low-power mode  
1
0
0
Notes: 1. Both HW and HW Suspend take precedence over SW Suspend.  
Table 8. Low-Power Mode Operation  
CIRRUS LOGIC PRODUCT DATA SHEET  
DS271PP3  
27  
 
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