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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  
5.2.2.3 Selecting which Events Cause Interrupts  
Register 13, LineCTL  
Bit Name Operation  
SerRxON When set, reception enabled.  
Bit  
6
The RxCFG register (Register 3) and the BufCFG  
register (Register B) are used to determine which  
receive events will cause interrupts to the host pro-  
cessor. Table 21 describes the interrupt enable (iE)  
bits in these registers.  
8
AUIonly  
When set, AUI selected (takes  
precedence over AutoAUI/10BT).  
9
AutoAUI/10BT When set, automatic interface  
selection enabled. When both bits  
8 and 9 are clear, 10BASE-T  
selected.  
Register 3, RxCFG  
Bit Bit Name  
Operation  
E
LoRx Squelch When set, receiver squelch level  
reduced by approximately 6 dB.  
8
RxOKiE When set, there is an interrupt if a  
frame is received with valid length  
and CRC*.  
Table 18. Physical Interface Configuration  
C CRCerroriE When set, there is an interrupt if a  
frame is received with bad CRC*.  
memory via DMA). Table 19 describes the config-  
uration bits in this register. Refer to Section 5.3 on  
page 87 for a detailed description of Destination  
Address filtering.  
D
RuntiE  
When set, there is an interrupt if a  
frame is received that is shorter than  
64 bytes*.  
E ExtradataiE When set, there is an interrupt if a  
frame is received that is longer than  
1518 bytes*.  
Register 5, LRxCTL  
Bit Bit Name  
Operation  
6
IAHashA When set, Individual Address frames  
that pass the hash filter are  
accepted*.  
* Must also pass the DA filter before there is an interrupt.  
Table 20.  
7
8
Promis When set, all frames are accepted*.  
cuousA  
Register B, BufCFG  
Bit  
Bit Name  
Operation  
RxOKA When set, frames with valid length  
and CRC and that pass the DA filter  
are accepted.  
7
RxDMAiE When set, there is an interrupt if  
one or more frames are trans-  
ferred via DMA.  
9
MulticastA When set, Multicast frames that pass  
the hash filter are accepted*.  
A
B
RxMissiE When set, there is an interrupt if a  
frame is missed due to insufficient  
receive buffer space.  
A
IndividualA When set, frames with DA that  
matches the IA at PacketPage base  
+ 0158h are accepted*.  
Rx128iE When set, there is an interrupt  
after the first 128 bytes of receive  
data have been buffered.  
B
Broad- When set, all broadcast frames are  
castA  
accepted*.  
D
F
MissOvfloiE When set, there is an interrupt if  
the RxMISS counter overflows.  
C CRCerrorA When set, frames with bad CRC that  
pass the DA filter are accepted.  
RxDestiE When set, there is an interrupt  
after the DA of an incoming frame  
has been buffered.  
D
RuntA  
When set, frames shorter than 64  
bytes that pass the DA filter are  
accepted.  
Table 21. Registers 3 and B Interrupt Configuration  
E ExtradataA When set, frames longer than 1518  
bytes that pass the DA filter are  
accepted (only the first 1518 bytes  
are buffered).  
5.2.2.4 Choosing How to Transfer Frames  
The RxCFG register (Register 3) and the BusCTL  
register (Register 17) are used to determine how  
frames will be transferred to host memory, as de-  
scribed in Table 22.  
* Must also meet the criteria programmed into bits 8, C, D,  
and E.  
Table 19. Frame Acceptance Criteria  
CIRRUS LOGIC PRODUCT DATA SHEET  
82  
DS271PP3