參數(shù)資料
型號： KSZ8851-16MLL TR
廠商： Micrel Inc
文件頁數(shù)： 27/84頁
文件大?。?/td> 0K
描述： IC MAC CTLR 1PORT W/BUS 48LQFP
產品培訓模塊： KSZ8851 10/100 Embedded Controllers
標準包裝： 1,000
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： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 48-LQFP
供應商設備封裝： 48-LQFP（7x7）
包裝： 帶卷 (TR)
Micrel, Inc.
KSZ8851-16MLL/MLLI
March 11, 2014
33
Revision 2.2
CPU Interface I/O Registers
The KSZ8851-16MLL provides an SRAM-like asynchronous bus interface for the CPU to access its internal I/O registers.
I/O registers serve as the address that the microprocessor uses when communicating with the device. This is used for
configuring operational settings, reading or writing control, status information, and transferring packets. The KSZ8851-
16MLL can be programmed to interface with either Big-Endian or Little-Endian processor.
I/O Registers
The following I/O Space Mapping Tables apply to 8 or 16-bit bus interface. Depending upon the bus mode selected, each
I/O access can be performed the following operations:
In 8-bit bus mode, there are 256 address locations which is based on SD[7:0] for address when CMD=1. The SD[7:0] is
for data when CMD=0.
In 16-bit bus mode, there are 64 address locations which is based on SD[7:2] ([1:0] is “Do Not Care”) for address and
SD[15:12] for Byte Enable BE[3:0] (either one byte or two bytes) when CMD=1. The SD[15:0] is for data when CMD=0.
Internal I/O Registers Space Mapping
I/O Register Offset Location
Register
Name
Default
Value
Description
16-Bit
8-Bit
0x00 - 0x01
0x00
0x01
Reserved
Do Not
Care
None
0x02 - 0x03
0x02
0x03
0x04 - 0x05
0x04
0x05
Reserved
Do Not
Care
None
0x06 - 0x07
0x06
0x07
0x08 - 0x09
0x08
0x09
CCR
Read only
Chip Configuration Register [7:0]
Chip Configuration Register [15:8]
0x0A - 0x0B
0x0A
0x0B
Reserved
Do Not
Care
None
0x0C - 0x0D
0x0C
0x0D
Reserved
Do Not
Care
None
0x0E - 0x0F
0x0E
0x0F
0x10 - 0x11
0x10
0x11
MARL
-
MAC Address Register Low [7:0]
MAC Address Register Low [15:8]
0x12 - 0x13
0x12
0x13
MARM
-
MAC Address Register Middle [7:0]
MAC Address Register Middle [15:8]
0x14 - 0x15
0x14
0x15
MARH
-
MAC Address Register High [7:0]
MAC Address Register High [15:8]
0x16 - 0x17
0x16
0x17
Reserved
Do Not
Care
None
0x18 - 0x19
0x18
0x19
Reserved
Do Not
Care
None
0x1A - 0x1B
0x1A
0x1B
0x1C - 0x1D
0x1C
0x1D
Reserved
Do Not
Care
None
0x1E - 0x1F
0x1E
0x1F
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