KSZ8842-16 Micrel Semiconductor, KSZ8842-16 Datasheet
KSZ8842-16
Manufacturer Part Number
KSZ8842-16
Description
2-port Ethernet Switch with PCI Interface
Manufacturer
Micrel Semiconductor
Datasheet
1.KSZ8842-16.pdf
(2 pages)
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Micrel Semiconductor
Block Diagram
Description
The KSZ8842-PMQL is the industry’s first 2-port switch
with a PCI CPU interface. An Industrial Temperature
grade part, the KSZ8842-PMQLI will also available from
Q1, 2006. The KSZ8842P is a proven, 4th generation,
integrated, fully managed Layer 2 switch that is entirely
compliant to IEEE802.3u standards.
The KSZ8842P can be configured as a low-latency re-
peater to allow for ‘cut thru’ in latency critical Embedded or
Industrial Ethernet applications. For industrial automation
applications, it runs in half-duplex mode.
The KSZ8842P offers an extensive feature set that includes
tag/port-based VLAN, QoS priority management, MAC
filtering function, MIB counters, and CPU control/data
interfaces to effectively address both current and emerg-
ing Fast Ethernet applications.
The KSZ8842P contains two 10/100 transceivers with
patented mixed-signal low-power technology, two 1K
entry media access control (MAC) units, a separate
DMA channel, a high-speed non-blocking switch fabric,
a dedicated 1K entry forwarding table, and an on-chip
frame buffer memory.
www.micrel.com
PCI Bus
Interface
EEPROM I/F
P1 LED[3:0]
P2 LED[3:0]
MDI/MDI-X
MDI/MDI-X
2-Port Ethernet Switch with
HP Auto
HP Auto
TEL:
1.408.944.0800
Interface Unit
32 Bit/33MHz
Registers
Drivers
10/100
10/100
Control
PHY 1
PHY 2
T/TX
T/TX
LED
PCI
PCI Interface
Channel
10/100
10/100
MAC 1
MAC 2
DMA
FAX:
1.408.474.1000
Management
Management
1K Look-up
EEPROM
Counters
Interface
Engine
Queue
Buffers
Buffer
Frame
MIB
Benefits
In addition to offering all of the features of an integrat-
ed Layer 2 managed switch:
• 2-port switch with 32 bit/33MHz PCI bus for differ-
• Fully compliant to the IEEE802.3u standard
• Repeater mode capabilities to allow for ‘cut-thru’
• Dynamic buffer memory scheme
• Micrel LinkMD
• HP Auto MDIX crossover with disable and enable
• Industrial temperature support: –40
• Four priority queues to handle voice, video, data,
ent host processor interfaces
in latency critical Industrial Ethernet or Embedded
Ethernet applications
– Essential for applications such as Video over IP
where image jitter is unacceptable
determine cable length, determine distance to fault,
and to diagnose faulty cables
option
and control packets
HTTP://
Note: For an MII/RMII, I
www.micrel.com
TM
cable diagnostic capabilities to
2
C or SPI interface, use the KSZ8893ML.
PMQL/PMQLI
LinkMD is a trademark of Micrel, Inc.
KSZ8842
Product Brief
o
C to +85
o
C
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KSZ8842-16 Summary of contents
Page 1
... Embedded or Industrial Ethernet applications. For industrial automation applications, it runs in half-duplex mode. The KSZ8842P offers an extensive feature set that includes tag/port-based VLAN, QoS priority management, MAC filtering function, MIB counters, and CPU control/data interfaces to effectively address both current and emerg- ing Fast Ethernet applications ...
Page 2
... Per port-based software power-save on PHY (idle link detection, register configuration preserved) • Single power supply: 3.3V • Commercial Temperature Range: 0 • Industrial Temperature Range: –40 (KSZ8842-PMQLI ordering code) • Available in 128-pin PQFP Applications • Consumer Applications: – Set-Top Box • Fax • TV • Digital TV • ...