KSZ8995MA Micrel Inc, KSZ8995MA Datasheet - Page 36

• Manufacturer Part Number: KSZ8995MA
• Description: IC SWITCH 10/100 5PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KSZ8995MA

• Data Rate: 100Mbps
• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• No. Of Ports: 5
• Ethernet Type: IEEE 802.3u
• Supply Voltage Range: 1.7V To 1.9V, 3.15V To 3.45V
• Operating Temperature Range: 0°C To +70°C
• Digital Ic Case Style: QFP
• No. Of Pins: 128
• Number Of Primary Switch Ports: 5
• Internal Memory Buffer Size: 64
• Operating Supply Voltage (typ): 1.8/2.5/3.3V
• Fiber Support: Yes
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII/SNI
• Power Supply Type: Analog/Digital
• Package Type: PQFP
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Temperature Classification: Commercial
• Interface Type: MII, SNI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 576-1607 - BOARD EVAL EXPERIMENT KSZ8995MA
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant
• Other names: 576-1039

KS8995MA
To use the KS8995MA SPI:
M9999-051305
1. At the board level, connect KS8995MA pins as follows:
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 100µs, the start switch bit in Register 1 will be set to
4. Write configuration to registers using a typical SPI write data cycle as shown in Figure 8 or SPI multiple write as shown
5. Registers can be read and configuration can be verified with a typical SPI read data cycle as shown in Figure 9 or
6. After configuration is written and verified, write a ‘1’ to Register 1 bit 0 to begin KS8995MA operation.
Pin Number
KS8995MA
‘0’. Configure the desired settings in the KS8995MA before setting the start register to ‘1.'
in Figure 10. Note that data input on SPID is registered on the rising edge of SPIC.
a multiple read as shown in Figure 11. Note that read data is registered out of SPIQ on the falling edge of SPIC.
112
110
111
109
Signal Name
KS8995MA
SPIS_N
SPIC
SPID
SPIQ
Table 9. SPI Connections
Microprocessor Signal
Description
SPI Slave Select
SPI Clock
Master Out Slave Input
Master In Slave Output
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Micrel, Inc.
May 2005