参数资料
型号: KSZ8842-PMBL AM
厂商: Micrel Inc
文件页数: 10/119页
文件大小: 0K
描述: IC ETHERNET SW 2PORT 100-LFBGA
标准包装: 260
控制器类型: 以太网开关控制器
接口: PCI
电源电压: 3.1 V ~ 3.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 100-LFBGA
供应商设备封装: 100-LFBGA
包装: 托盘
产品目录页面: 1081 (CN2011-ZH PDF)
配用: 576-1636-ND - BOARD EVALUATION KSZ8842-PMQL
其它名称: 576-3348
Micrel, Inc.
KSZ8842-PMQL/PMBL
October 2007
107
M9999-100207-1.5
Dynamic MAC Address Table
The Dynamic MAC address is a read only table.
Bit
Default
R/W
Description
71
RO
Data not ready
1 = specifies that the entry is not ready, continue retrying until bit is
set to 0
0 = specifies that the entry is ready
70 – 67
RO
Reserved
66
1
RO
MAC empty
1 = specifies that there is no valid entry in the table
0 = specifies that there are valid entries in the table
65 – 56
00_0000_0000
RO
No of valid entries
Indicates how many valid entries in the table
0x3ff means 1 K entries
0x001 means 2 entries
0x000 and bit 66 = 0 means 1 entry
0x000 and bit 66 = 1 means 0 entry
55 – 54
RO
Time Stamp
Specifies the 2-bit counter for internal aging.
53 – 52
00
RO
Source port
Identifies the source port where FID+MAC is learned:
00, port 1
01, port 2
10, port 3
51 – 48
0x0
RO
FID
Specifies the filter ID.
47 – 0
0x000_0000_0000
RO
MAC Address
Specifies the 48-bit MAC address.
Table 13. Dynamic MAC Address Table Format (1024 Entries)
Example:
Dynamic MAC Address Table Read (read the first entry at indirect address offset 0 and retrieve the MAC table size)
Write to reg. IACR with 0x1800 (set indirect address and trigger a read dynamic MAC table operation)
Then
Read reg. IADR1 (dynamic MAC table bits 71-64) // If bit 71 =1, restart (reread) from this register
Read reg. IADR3 (dynamic MAC table bits 63-48)
Read reg. IADR2 (dynamic MAC table bits 47-32)
Read reg. IADR5 (dynamic MAC table bits 31-16)
Read reg. IADR4 (dynamic MAC table bits 15-0)
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