KSZ8997 Micrel Inc, KSZ8997 Datasheet - Page 12

• Manufacturer Part Number: KSZ8997
• Description: 8 Port 10/100 Switch With PHY And Frame Buffers (Lead Free)
• Manufacturer: Micrel Inc

Specifications of KSZ8997

• 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: Lead free / RoHS Compliant
• Other names: 576-1043

KS8997
Note 1.
KS8997
Group
CTRL
All unmanaged programming takes place at reset time only. For unmanaged programming: F = Float, D = Pull-down, U = Pull-up, H = Hold
pin state after reset. See “Reference Circuits” section.
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]
EN1P
RST#
SDA
SCL
X1
X2
Active Status
Clock
Clock
Clock
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.
D = Drop frame after 16 collisions
F/U = Continue sending frame regardless of the number of collisions (default)
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 duplex 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 priorty 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
(Note 1)
12
August 2003
Micrel