KS8995E Micrel Inc, KS8995E Datasheet - Page 14

• 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

KS8995E
Note 1.
KS8995E
Group
CTRL
TEST
All unmanaged programming takes place at reset time only. For unmanaged programming: F = Float, D = Pull-down, U = Pull-up.
See
“Reference Circuits”
LED[3][1:0]
LED[4][3:1]
LED[5][3:0]
I/O Names
MRXD[0:3]
TEST[1:2]
LED[4][0]
SCANEN
MUX[1:2]
TESTEN
P5EXT
MCOL
P5SNI
AOUT
RST#
SDA
SCL
X1
X2
Active Status
section.
Clock
Clock
Clock
H
H
H
H
H
H
H
L
Description
Programs force 100BaseTX / 10BaseT mode at reset time. Disable auto-negotiation
Signal
LED[3][1] 5
LED[3][0] 4
LED[4][3] 3
LED[4][2] 2
LED[4][1] 1
Programs force full / half-duplex mode at reset time. Disable auto-negotiation to use
this force mode. Use the table below to set this mode on the appropriate port.
Signal
LED[4][0] 5
LED[5][3] 4
LED[5][2] 3
LED[5][1] 2
LED[5][0] 1
Programs auto-negotiation enable / disable at reset time. Use the table below to set
this mode on the appropriate port.
Signal
MRXD[3]
MRXD[2]
MRXD[1]
MRXD[0]
MCOL
Note 1. To use external MII on port 5 disable auto-negotiation by pulling MRXD[3] up.
Note 2. Use the “disable auto-negotiation” mode in conjunction with force 10/100 and
force full/half-duplex to get the desired configuration. See above descriptions for force
modes.
Port 5 external selection.
D = 5 port IS mode
U = External MAC interface enabled and no longer connected to internal port 5 PHY.
Port 5 interface protocol. This is only relevant when P5EXT is tied high.
D = MII interface
U = SNI interface
External crystal or clock input.
Used when other polarity of crystal is needed. This is unused for a normal clock input.
Clock for EEPROM.
Serial data for EEPROM.
System reset.
Factory test input: tie to ground for normal operation.
Factory test input: tie to ground for normal operation.
Factory test input: leave open.
Factory test output: leave open.
Factory test inputs: leave open.
to use this force mode. Use the table below to set this mode on the appropriate port.
Port
Port
Port
5
4
3
2
1
(Note 1)
Force 10BaseT
w/o Auto-negotiation
D
D
D
D
D
Force half-duplex
w/o Auto-negotiation
D
D
D
D
D
Enable
auto-negotiation
D
D
D
D
D
14
Force 100BaseTX
w/o Auto-negotiation
U
U
U
U
U
Force full-duplex
w/o Auto-negotiation
U
U
U
U
U
Disable
auto-negotiation
U
U
U
U
U
Auto-negotiation
enabled
F
F
F
F
F
Auto-negotiation
enabled
F
F
F
F
F
August 2003
Micrel