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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  
4.3.3 Interrupt Number  
(Read/Write, Address: PacketPage base + 0022h)  
Address 0023h  
Address 0022h  
Interrupt number assignment:  
0000 0000b= pin INTRQ0  
0000 0001b= pin INTRQ1  
0000 0010b= pin INTRQ2  
00h  
0000 0011b= pin INTRQ3  
0000 01XXb= All INTRQ pins high-impedence  
The Interrupt Number Register defines the interrupt pin selected by the CS8900A. In a typical application the follow-  
ing bus signals are tied to the following pins:  
Bus signal  
IRQ5  
Typical pin connection  
INTRQ3  
IRQ10  
IRQ11  
INTRQ0  
INTRQ1  
IRQ12  
INTRQ2  
See Section 3.2 on page 18.  
After reset, if no EEPROM is found by the CS8900A, then the register has the following initial state, which corre-  
sponds to placing all the INTRQ pins in a high-impedance state. If an EEPROM is found, then the register’s initial  
value may be set by the EEPROM. See Section 3.3 on page 19.  
Reset value is: XXXX XXXX XXXX X100  
4.3.4 DMA Channel Number  
(Read/Write, Address: PacketPage base + 0024h)  
Address 0025h  
00h  
Address 0024h  
DMA channel assignment:  
0000 0000b= pin DMRQ0 and DMACK0  
0000 0001b= pin DMRQ1 and DMACK1  
0000 0010b= pin DMRQ2 and DMACK2  
0000 0011b= All DMRQ pins high-impedence  
The DMA Channel register defines the DMA pins selected by the CS8900A. In the typical application, the following  
bus signals are tied to the following pins:  
Bus signal  
DRQ5  
Typical pin connection  
DMRQ0  
DACK5  
DMACK0  
DRQ6  
DMRQ1  
DACK6  
DRQ7  
DMACK1  
DMRQ2  
DACK7  
DMACK2  
See Section 3.2 on page 18 and Section 5.4 on page 90.  
After reset, if no EEPROM is found by the CS8900A, then the register has the following initial state which corre-  
sponds to setting all DMRQ pins to high-impedance. If a EEPROM is found, then the register’s initial value may be  
set by the EEPROM. See Section 3.3 on page 19.  
Reset value is: XXXX XXXX XXXX XX11  
CIRRUS LOGIC PRODUCT DATA SHEET  
DS271PP3  
43  
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