KSZ8864RMNI MICREL [Micrel Semiconductor], KSZ8864RMNI Datasheet - Page 44
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KSZ8864RMNI
Manufacturer Part Number
KSZ8864RMNI
Description
Integrated 4-Port 10/100 Managed Switch with Two MACs MII or RMII Interfaces
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
1.KSZ8864RMNI.pdf
(112 pages)
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September 2011
To use the KSZ8864RMN SPI:
1. At the board level, connect KSZ8864RMN pins as follows:
2. Set the input signals PS[1:0] (pins 59 and 60, respectively) to “10” to set the serial configuration to SPI slave
3. Power up the board and assert a reset signal. After reset wait 100µs, the start switch bit in Register 1 will be set
4. Write configuration to registers using a typical SPI write data cycle as shown in Figure 9 or SPI multiple write as
5. Registers can be read and configuration can be verified with a typical SPI read data cycle as shown in Figure 10
6. After configuration is written and verified, write a ‘1’ to Register 1 bit 0 to begin KSZ8864RMN switch operation.
KSZ8864RMN Pin
mode.
to ‘0’. Configure the desired settings in the KSZ8864RMN before setting the start register to ‘1.'
shown in Figure 11. Note that data input on SPID is registered on the rising edge of SPIC.
or a multiple read as shown in Figure 12. Note that read data is registered out of SPIQ on the falling edge of
SPIC.
Number
58
56
57
55
KSZ8864RMN Signal
SPID/SDA
SPIS_N
Name
SPIQ
SCL
Figure 10. SPI Read Data Cycle
Figure 9. SPI Write Data Cycle
Table 8. SPI Connections
Microprocessor Signal Description
SPI Slave Select
SPI Clock
Master Out Slave Input
Master In Slave Output
44
M9999-092011-1.4
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