KSZ8997 Micrel Inc, KSZ8997 Datasheet - Page 11

• 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

I/O Grouping
August 2003
I/O Descriptions
Note 1.
KS8997
Group Name
Group
PWR/GND
PHY
IND
UP
CTRL
TEST
PHY
IND
UP
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.
MODESEL[1:0]
LED[1:8][0]
LED[1:8][2]
LED[1:8][3]
I/O Names
RXM[1:8]
TXM[1:8]
LED[1][3]
LED[1][2]
LED[1][0]
LED[2][3]
LED[2][2]
RXP[1:8]
TXP[1:8]
ISET
Description
Physical Interface
LED Indicators
Unmanaged Programmable
Control and Miscellaneous
Test (Factory)
Power and Ground
Active Status
Analog
Analog
Analog
H
L
L
L
Description
Differential inputs (receive) for connection to media transformer.
Differential outputs (transmit) for connection to media transformer.
Transmit Current Set. Connect an external reference resistor to set transmitter
output current. This pin is connected to a 1% 3k
with 1:1 turn ratio is used.
Output (after reset)
Mode 0: Speed (on = 100/off = 10)
Mode 1: Reserve
Mode 2: Collision (on = collision/off = no collision)
Mode 3: Speed (on = 100/off = 10)
Output (after reset)
Mode 0: Collision (on = collision/off = no collision)
Mode 1: Reserve
Mode 2: Link activity (10Mb mode)
Mode 3: Full Duplex + Collision
(constant on = full-duplex; intermittent on = collision;
off = half-duplex with no collision)
Output (after reset)
Mode 0: Link + Activity
Mode 1: Reserve
Mode 2: Link activity (100Mb mode)
Mode 3: Link + Activity
Note: Mode is set by MODESEL[1:0] ; See description in UP (unmanaged
programming) section
Mode select at reset time. LED mode is selected by using the table below.
MODESEL
[1]
0
0
1
1
Reserved - use float configuration
Reserved - use float configuration
Reserved - use float configuration
Reserved - use float configuration
Reserved - use float configuration
[0]
0
1
0
1
(Note 1)
Operation
LED mode 0
LED mode 1
LED mode 2
LED mode 3
11
resistor to ground if a transformer
KS8997
Micrel