CS8900-IQ3 Ver la hoja de datos (PDF) - Cirrus Logic
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CS8900-IQ3 Datasheet PDF : 138 Pages
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CS8900A
Crystal LAN™ ISA Ethernet Controller
EEPROM 20 MHz
XTAL
I
S
CS8900A
A
(2.0 sq. in.)
RJ-45 10BASE-T
Figure 1. Complete Ethernet Motherboard Solution
tive portable and desktop PCs. Motherboard design
options include:
• An EEPROM can be used to store node-specif-
ic information, such as the Ethernet Individual
Address and node configuration.
• The 20 MHz crystal oscillator may be replaced
by a 20 MHz clock signal.
1.2.2 Ethernet Adapter Cards
The CS8900A’s highly efficient PacketPage archi-
tecture, with StreamTransfer™ and Auto-Switch
DMA options, make it an excellent choice for high-
performance, low-cost ISA adapter cards
(Figure 2). The CS8900A’s wide range of configu-
ration options and performance features allow en-
gineers to design Ethernet solutions that meet their
particular system requirements. Adapter card de-
sign options include:
• A Boot PROM can be added to support diskless
applications.
• The 10BASE-T transmitter and receiver im-
pedance can be adjusted to support 100, 120, or
150 Ohm twisted pair cables.
• An external Latchable-Address-bus decode cir-
cuit can be added to operate the CS8900A in
Upper-Memory space.
• On-chip LED ports can be used for either op-
tional LEDs, or as programmable outputs.
EEPROM
20 MHz
XTAL
’245
Boot PROM
CS8900A
LED
RJ-45
Attachment
Un it
Interface
(AUI)
Figure 2. Full-Featured ISA Adapter Solution
CIRRUS LOGIC PRODUCT DATASHEET
8
DS271PP4
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