參數(shù)資料
型號: KSZ8851SNLI TR
廠商: Micrel Inc
文件頁數(shù): 36/80頁
文件大小: 0K
描述: IC ETHERNET CTLR 1PORT PCI 32MLF
標(biāo)準(zhǔn)包裝: 1
控制器類型: 以太網(wǎng)控制器,MAC/PHY
接口: 總線
電源電壓: 1.8V,2.5V,3.3V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,32-MLF?
供應(yīng)商設(shè)備封裝: 32-MLF?(5x5)
包裝: 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面: 1081 (CN2011-ZH PDF)
其它名稱: 576-3506-6
Micrel, Inc.
KSZ8851SNL/SNLI
August 2009
41
M9999-083109-2.0
MARH[15:0] = 0x0123
Host MAC Address Register Low (0x10 – 0x11): MARL
The following table shows the register bit fields for Low word of Host MAC address.
Bit
Default Value
R/W
Description
15-0
-
RW
MARL MAC Address Low
The least significant word of the MAC address.
Host MAC Address Register Middle (0x12 – 0x13): MARM
The following table shows the register bit fields for middle word of Host MAC address.
Bit
Default Value
R/W
Description
15-0
-
RW
MARM MAC Address Middle
The middle word of the MAC address.
Host MAC Address Register High (0x14 – 0x15): MARH
The following table shows the register bit fields for high word of Host MAC address.
Bit
Default Value
R/W
Description
15-0
-
RW
MARH MAC Address High
The Most significant word of the MAC address.
0x16 – 0x1F: Reserved
On-Chip Bus Control Register (0x20 – 0x21): OBCR
This register controls the on-chip bus clock speed for the KSZ8851SNL. The default of the on-chip bus clock speed is 125
MHz. When the external host CPU is running at a higher clock rate, the on-chip bus should be adjusted for the best
performance.
Bit
Default Value
R/W
Description
15-7
-
RO
Reserved
6
0
RW
Output Pin Drive Strength
Bi-directional or output pad drive strength selection.
0: 8 mA
1: 16 mA
5-3
0x0
RO
Reserved
2
0
RW
On-Chip Bus Clock Selection
0: 125 MHz (default setting is divided by 1, Bit[1:0]=00)
1: NA (reserved)
1-0
0x0
RW
On-Chip Bus Clock Divider Selection
00: Divided by 1.
01: Divided by 2.
10: Divided by 3.
11: NA (reserved).
For example to contol the bus clock speed as below:
If Bit 2 = 0 and this value is set 00 to select 125 MHz.
If Bit 2 = 0 and this value is set 01 to select 62.5 MHz.
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