KS8997 Micrel Inc, KS8997 Datasheet - Page 12

• Manufacturer Part Number: KS8997
• Description: IC SWITCH 10/100 8PORT 128PQFP
• Manufacturer: Micrel Inc

Specifications of KS8997

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 128-MQFP, 128-PQFP
• Fiber Support: No
• Integrated Led Drivers: Yes
• Phy/transceiver Interface: MII
• 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: Contains lead / RoHS non-compliant

February 2007
Group
CTRL
TEST
I/O Names
LED[2][0]
LED[3][3]
LED[3][2]
LED[3][0]
LED[4][3]
LED[4][2]
LED[4][0]
LED[5][3]
LED[5][2]
LED[5][0]
LED[6][3]
LED[6][2]
LED[6][0]
LED[7][3]
LED[7][2]
LED[7][0]
LED[8][3]
LED[8][2]
LED[8][0]
T[1], T[5]
RLPBK
EN1P
RST#
SDA
SCL
X1
X2
Active Status
Clock
Clock
Clock
H
H
L
Description
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Reserved – use float configuration
Programs back-off aggressiveness for half-duplex mode.
D = Less aggressive back-off
F/U = More aggressive back-off (default
Programs retries for frames that encounter collisions.
Reserved – use float configuration
Programs flow control.
D = No flow control
F/U = Flow control enabled (default)
Programs broadcast storm protection.
D = 5% broadcast frames allowed
F/U = Unlimited broadcast frames (default)
Reserved – use float configuration
Programs address aging.
D = Aging disabled
F/U = Enable 5 minute aging (default)
Programs frame length enforcement.
D = Max length for VLAN is 1522 bytes and without VLAN is 1518 bytes
F/U = Max length is 1536 bytes (default)
Programs half-duplex back pressure.
D = No half-duplex back pressure
F/U = Half-suplex back pressure enabled (default)
Enable 802.1p for all ports: this enables QoS based on the priority field in the
layer 2 header.
0 = 802.1p selected by port in EEPROM
1 = Use 802.1p priority field unless disabled in EEPROM
Note: This is also controlled by the EEPROM registers (registers 4-11 bit 4).
The values in the EEPROM supercede this pin. Also, if the priority selection is
unaltered in the EEPROM registers (register 3 bits 0-7) then values of ‘100’
and above are considered high priority and values of ‘011’ and below are low
priority.
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 inputs: leave open (float) for normal operation
Factory test input: tie low for normal operation
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