參數(shù)資料
型號: KSZ8895MQ
廠商: Micrel Inc
文件頁數(shù): 66/119頁
文件大?。?/td> 0K
描述: IC ETHERNET SW 5PORT 128-PQFP
標準包裝: 66
控制器類型: 以太網(wǎng)開關控制器
接口: MII
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: 128-BFQFP
供應商設備封裝: 128-PQFP(14x20)
包裝: 托盤
配用: 576-3871-ND - BOARD EVALUATION FOR KSZ8895MQ
其它名稱: 576-3753
Micrel, Inc.
KSZ8895MQ/RQ/FMQ
To use the KSZ8895MQ/RQ/FMQ SPI:
1.
At the board level, connect KSZ8895MQ/RQ/FMQ pins as follows:
KSZ8895MQ/RQ/FMQ
Pin Number
KSZ8895MQ/RQ/FMQ
Signal Name
Microprocessor Signal Description
112
SPIS_N
SPI Slave Select
110
SPIC
SPI Clock
111
SPID
Master Out Slave Input
109
SPIQ
Master In Slave Output
Table 10. SPI Connections
2.
Set the input signals PS[1:0] (pins 113 and 114, respectively) to “10” to set the serial configuration to SPI slave
mode.
3.
Power up the board and assert a reset signal. After reset wait 100s, the start switch bit in Register 1 will be set
to ‘0’. Configure the desired settings in the KSZ8895MQ/RQ/FMQ before setting the start register to ‘1.'
4.
Write configuration to registers using a typical SPI write data cycle as shown in Figure 9 or SPI multiple write as
shown in Figure 11. Note that data input on SPID is registered on the rising edge of SPIC.
5.
Registers can be read and configuration can be verified with a typical SPI read data cycle as shown in Figure 10
or a multiple read as shown in Figure 12. Note that read data is registered out of SPIQ on the falling edge of
SPIC.
6.
After configuration is written and verified, write a ‘1’ to Register 1 bit 0 to begin KSZ8895MQ/RQ/FMQ switch
operation.
SPIQ
SPIC
SPID
SPIS_N
0
1
0
X
A7
A6
A5
A4
A3
A2
A1
A0
WRITE COMMAND
WRITE ADDRESS
WRITE DATA
D2
D0
D1
D3
D4
D5
D6
D7
Figure 14. SPI Write Data Cycle
SPIQ
SPIC
SPID
SPIS_N
0
1
X
A7
A6
A5
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
READ COMMAND
READ ADDRESS
READ DATA
Figure 15. SPI Read Data Cycle
March 12, 2014
50
Revision 1.7
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