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PDF KS8997 Data sheet ( Hoja de datos )
| Número de pieza | KS8997 | |
| Descripción | 8-Port 10/100 Integrated Switch | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de KS8997 (archivo pdf) en la parte inferior de esta página. Total 37 Páginas | ||
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KS8997
Micrel
KS8997
8-Port 10/100 Integrated Switch with PHY and Frame Buffer
Rev. 1.07
General Description
The KS8997 contains eight 10/100 physical layer transceiv-
ers, eight MAC (Media Access Control) units with an inte-
grated layer 2 switch. The device runs as an eight port
integrated switch
The KS8997 is designed to reside in an unmanaged design
not requiring processor intervention. This is achieved through
I/O strapping or EEPROM programming at system reset time.
On the media side, the KS8997 supports 10BaseT and
100BaseTX through auto-negotiation as specified by the
IEEE 802.3 committee.
Physical signal transmission and reception are enhanced
through use of analog circuitry that makes the design more
efficient and allows for lower power consumption and smaller
chip die size.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
• 8-port 10/100 integrated switch with 8 physical layer
transceivers
• 32Kx32 of SRAM on chip for frame buffering
• 2.0Gbps high performance memory bandwidth
• 10BaseT and 100BaseTX modes of operation
• Superior analog technology for reduced power and die
size
• Single 2.0V power supply with options for 2.5V and 3.3V
I/O
• 900mA (1.80 W) including physical transmit drivers
• Supports port based VLAN
• Supports DiffServ priority, 802.1p based priority or port
based priority
• Indicators for link, activity, full/half-duplex and speed
• Unmanaged operation via strapping or EEPROM at
system reset time
Functional Diagram
Look Up
Engine
(1K Entries)
Queue Priority
Management
Buffer
Management
SRAM
Buffers
FIFO, Flow Control, VLAN and Priority Processing
www.DataSheet4U.com
EEPROM /
Interface
SCL
SDA
LED
and
Programming
Interface
LED[1][3,2,0]
LED[2][3,2,0]
LED[3][3,2,0]
LED[4][3,2,0]
LED[5][3,2,0]
LED[6][3,2,0]
LED[7][3,2,0]
LED[8][3,2,0]
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
August 2003
1
KS8997
1 page  
KS8997
Micrel
Port 8 Control Register ................................................................................................................................................... 24
Reserved Register .......................................................................................................................................................... 24
Port 1 VLAN Mask Register ............................................................................................................................................ 25
Port 2 VLAN Mask Register ............................................................................................................................................ 25
Port 3 VLAN Mask Register ............................................................................................................................................ 25
Port 4 VLAN Mask Register ............................................................................................................................................ 26
Port 5 VLAN Mask Register ............................................................................................................................................ 26
Port 6 VLAN Mask Register ............................................................................................................................................ 27
Port 7 VLAN Mask Register ............................................................................................................................................ 27
Port 8 VLAN Mask Register ............................................................................................................................................ 28
Reserved Register .......................................................................................................................................................... 28
Port 1 VLAN Tag Insertion Value Registers .................................................................................................................... 28
Port 2 VLAN Tag Insertion Value Registers .................................................................................................................... 28
Port 3 VLAN Tag Insertion Value Registers .................................................................................................................... 28
Port 4 VLAN Tag Insertion Value Registers .................................................................................................................... 29
Port 5 VLAN Tag Insertion Value Registers .................................................................................................................... 29
Port 6 VLAN Tag Insertion Value Registers .................................................................................................................... 29
Port 7 VLAN Tag Insertion Value Registers .................................................................................................................... 29
Port 8 VLAN Tag Insertion Value Registers .................................................................................................................... 29
Reserved Register .......................................................................................................................................................... 29
Diff Serve Code Point Registers ..................................................................................................................................... 29
Station MAC Address Registers ..................................................................................................................................... 29
Absolute Maximum Ratings .......................................................................................................................................................... 30
Operating Ratings .......................................................................................................................................................................... 30
Electrical Characteristics .............................................................................................................................................................. 30
Timing Diagrams ............................................................................................................................................................................ 32
Reference Circuit ........................................................................................................................................................................... 32
Qualified Magnetic Lists ................................................................................................................................................................ 33
4B/5B Coding .................................................................................................................................................................................. 34
MLT Coding .................................................................................................................................................................................... 35
MAC Frame for 802.3 ..................................................................................................................................................................... 35
Selection of Isolation Transformers ............................................................................................................................................. 36
Selection of Reference Oscillator/Crystal .................................................................................................................................... 36
Package Information ...................................................................................................................................................................... 37
www.DataSheet4U.com
August 2003
5
KS8997
5 Page 
KS8997
I/O Grouping
Group Name
Description
PHY
Physical Interface
IND LED Indicators
UP Unmanaged Programmable
CTRL
Control and Miscellaneous
TEST
Test (Factory)
PWR/GND
Power and Ground
Micrel
I/O Descriptions
Group
I/O Names Active Status Description(Note 1)
PHY
RXP[1:8]
RXM[1:8]
Analog
Differential inputs (receive) for connection to media transformer.
TXP[1:8]
TXM[1:8]
Analog
Differential outputs (transmit) for connection to media transformer.
ISET
Analog
Transmit Current Set. Connect an external reference resistor to set transmitter
output current. This pin is connected to a 1% 3kΩ resistor to ground if a transformer
with 1:1 turn ratio is used.
IND LED[1:8][0]
L 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)
LED[1:8][2]
L 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)
LED[1:8][3]
L 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
UP MODESEL[1:0]
H
Mode select at reset time. LED mode is selected by using the table below.
MODESEL
[1] [0]
Operation
www.DataSheet4U.cLoEmD[1][3]
00
01
10
11
LED mode 0
LED mode 1
LED mode 2
LED mode 3
Reserved - use float configuration
LED[1][2]
Reserved - use float configuration
LED[1][0]
Reserved - use float configuration
LED[2][3]
Reserved - use float configuration
LED[2][2]
Reserved - use float configuration
Note 1. 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.
August 2003
11
KS8997
11 Page | ||
| Páginas | Total 37 Páginas | |
| PDF Descargar | [ Datasheet KS8997.PDF ] | |
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