KS8995E Micrel Inc, KS8995E Datasheet - Page 13

• Manufacturer Part Number: KS8995E
• Manufacturer: Micrel Inc

Specifications of KS8995E

• Number Of Primary Switch Ports: 5
• 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
• Lead Free Status / RoHS Status: Not Compliant

Note 1.
August 2003
KS8995E
Group
UP
All unmanaged programming takes place at reset time only. For unmanaged programming: F = Float, D = Pull-down, U = Pull-up.
See
MODESEL[3:0]
“Reference Circuits”
LED[1][1:0]
I/O Names
LED[1][3]
LED[1][2]
LED[2][3]
LED[2][2]
LED[2][1]
LED[2][0]
LED[3][3]
LED[3][2]
Active Status
section.
H
Description
Mode select at reset time. LED mode is selected by using the table below. Note that
under normal operation MODESEL[3:2] must be tied low.
MODESEL
3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Programs flow control on all PHY ports at reset time.
D = No flow control
F/U = Flow control
Programs flow control on the external MAC port at reset time.
D = No flow control
U = Flow control
Programs buffer allocation per port at reset time. Use the following table to select the
option:
LED[1]
0
D
D
U
U
Programs MAC address aging in the address look-up table at reset time. Aging
eliminates old entries from the table.
D = No aging
F/U = 5 minute aging
Pull-down for normal operation.
Programs back pressure in half-duplex at reset time.
D = No back pressure
F/U = Back pressure enabled
Programs aggressive back off in half-duplex at reset time.
D = Standard back off
F/U = Aggressive mode enabled
Programs no excessive collision drop at reset time.
D = Drop after 16 collisions
F/U = No drop after 16 collisions
Programs a limit for broadcast frames at reset time.
D = No limit
U = 25% - 3% limit of broadcast frames
Note: EEPROM programming can limit broadcast frames at 25%, 12%, 6% or 3%.
See
“EEPROM Register”
2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
D
U
D
U
(Note 1)
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Description
205 buffers max per port (default)
512 buffers max per port
768 buffers max per port
512 buffers (adaptive) per port
13
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
7 bits 7-6.
Operation
LED mode 0
LED mode 1
LED mode 2
LED mode 3
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
Used for factory testing
KS8995E
Micrel