(Advance Version
IP178A
8-Port 10/100 Ethernet Integrated Switch
Feature
Three-in-one 8 port 10/100 Ethernet switch
- Built in an 8 port Ethernet switch engine
- Built in 8 10/100M transceivers
- Built in SSRAM
Support flow control
- Support IEEE802.3x for full duplex mode operation
- Support backpressure for half duplex mode
operation
Built in up to 1K MAC address
An 8 port switching fabric
- Support two-level hashing algorithm to improve
address collision
- Support address aging
- Store and forward mode
- Broadcast storm protection
Full line speed capability of 148800 (14880)
packets/sec for 100M (10M)
-
-
-
-
-
-
-
-
-
-
Support 1536 byte data transfer for VLAN traffic
Support one MII port
Support port base VLAN
Support CoS
DSP approach transceivers
Auto negotiation
Fully digital adaptive equalizer and timing recovery
module
Base line Wander correction
10BaseT, 100BaseT, and 100BaseFX(port6, port7
only) operation
Automatic MDI/MDI-X configuration
LED status of Link, Receive, Full duplex, and Speed
LED with power on diagnostic function
Set operation parameters via pins or EEPROM
interface
Utilize single clock source (25Mhz)
Utilize single power supply (2.5v)
0.25um technology
Packaged in 208 pin PQFP
General Description
IP178A is an 8 port 10/100 Ethernet integrated switch. It
consists of an 8-port switch controller and eight Fast
Ethernet transceivers. Each of the transceivers complies
with the IEEE802.3, IEEE802.3u, and IEEE802.3x
specifications. The transceivers in IP178A are designed
in DSP approach with advance 0.25um technology; this
results in high noise immunity and robust performance.
Two ports of IP178A can be configured as 100BaseFX.
The IP178A operates in store and forward mode. It
stores the incoming packet to the internal SSRAM and
learns the SA (source address) automatically if the
packet is error free. The SA is stored to the internal
address table. IP178A forwards a packet according to DA
and address table. When the segments of destination
ports are free, it reads the packet from the internal
SSRAM and forwards it to the appropriate ports
according to the address table. The incoming packets
with errors are dropped. IP178A supports IEEE802.3x,
optional backpressure, Auto MDI/MDI-X, CoS, port base
VLAN, one MII port and various LED functions, etc.
These functions can be configured to fit the different
requirements by feeding operation parameters via
EEPROM interface or pull up/down resistors on specified
pins.
Preliminary, Specification subject to change without notice
1
IP178A-DS-P05
Sep. 09, 2002
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
