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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  
Word Address  
FIRST WORD in DATA BLOCK  
00h A120h  
Value  
Description  
Configuration Block Header.  
The high byte, A1h, indicates a ‘C46 EEPROM is attached. The Link Byte,  
20h, indicates the number of bytes to be used in this block of configuration  
data.  
FIRST GROUP of WORDS  
01h  
2020h  
Group Header for first group of words.  
Three words to be loaded, beginning at 0020h in PacketPage memory.  
02h  
03h  
04h  
0300h  
0003h  
0001h  
I/O Base Address  
Interrupt Number  
DMA Channel Number  
SECOND GROUP of WORDS  
05h  
502Ch  
Group Header for second group of words.  
Six words to be loaded, beginning at 002Ch in PacketPage memory.  
06h  
07  
E000h  
000Fh  
0000h  
000Dh  
C000h  
000Fh  
Memory Base Address - low word  
Memory Base Address - high word  
Boot PROM Base Address - low word  
Boot PROM Base Address - high word  
Boot PROM Address Mask - low word  
Boot PROM Address Mask - high word  
08h  
09h  
0Ah  
0Bh  
THIRD GROUP of WORDS  
0Ch  
2158h  
Group Header for third group of words.  
Three words to be loaded, beginning at 0158 in PacketPage memory.  
0Dh  
0010h  
0000h  
0000h  
Individual Address - Octet 0 and 1  
Individual Address - Octet 2 and 3  
Individual Address - Octet 4 and 5  
0Eh  
0Fh  
CHECKSUM Value  
10h  
2800h  
The high byte, 28h, is the Checksum Value. In this example, the check-  
sum includes word addresses 00h through 0Fh. The hexadecimal sum of  
the bytes is D8h, resulting in a 2’s complement of 28h. The low byte, 00h,  
provides a pad to the word boundary.  
* FFFFh is a special code indicating that there are no more words in the EEPROM.  
Table 6. EEPROM Configuration Block Example  
CS8900A will not attempt to read configuration For example, a Reset Configuration Block header  
data from the EEPROM.  
of A104h indicates a non-sequential EEPROM pro-  
grammed with a Reset Configuration Block con-  
taining 4 bytes of configuration data. This Reset  
Configuration Block occupies 6 bytes (3 words) of  
EEPROM space (2 bytes for the header and 4 bytes  
of configuration data).  
3.4.3.5 Determining Number of Bytes in the Reset  
Configuration Block  
The low byte of the Reset Configuration Block  
header is known as the link byte. The value of the  
Link Byte represents the number of bytes of config-  
uration data in the Reset Configuration Block. The  
two bytes used for the header are excluded when  
calculating the Link Byte value.  
3.4.4 Groups of Configuration Data  
Configuration data are arranged as groups of  
words. Each group contains one or more words of  
data that are to be loaded into PacketPage registers.  
CIRRUS LOGIC PRODUCT DATA SHEET  
22  
DS271PP3  
 
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