Single chip fast Ethernet network interface control-
lers (NICs) for the PCI bus.
— Low-cost version of ET1201 targeted at PC LAN
on motherboard applications, and low cost NIC
solution.
—
PCI 2.2
specification compliant.
— Provides a direct connection to the PCI bus.
— Support of 10/100 Mbits/s Ethernet communica-
tions.
High performance PCI mastering structure.
— VIA-defined 256 byte I/O-based or memory-
mapped-I/O-based command and status regis-
ters.
— Software oriented chain structure description to
minimize hardware complexity.
— On chip bus master DMA with programmable
burst length for high PCI bus utilization.
— Transmit data buffer byte-alignment for low CPU
utilization.
— Dynamic transmit packet auto-queuing for back-
to-back transmission.
— Programmable activity polling intervals for
description DMA.
— Programmable DMA arbitration priority to mini-
mize overflow under flow conditions.
— Early receive and early transmit interrupts for
software parallel processing.
— Interrupt controllable by receive/transmit.
descriptor list for saving interrupt service time.
— PCI enhance command capable.
Provides standard 10 Base-T/100Base-Tx PHY
layer and transceiver.
— Supports 10Base-T/100Base-TX with CAT5
UTP, and STP.
— 10/100 Mbits/s full-duplex, half-duplex opera-
tion.
— Auto power-saving at cable not link.
— Four LED outputs, including link, duplex, speed,
and collision status.
Separate receive and transmit FIFOs.
— Both support bursts of up to full Ethernet length.
— Programmable receive and transmit FIFO
threshold control for optimize PCI throughput.
Flexible dynamic load EEPROM algorithm.
— Load after power-up.
— Dynamic auto reload.
— Dynamic direct programming for manufacturing.
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Power management.
— Supports PC99, PC2001, and net PC require-
ments.
— Supports PCI bus power management interface
specification version 1.0/1.1.
— Supports advanced configuration and power
interface (ACPI) specification 1.0.
— Supports network device class power manage-
ment specification version 1.0a.
— Wake-up even support link change/magic
packet/unicast physical address/MS define pat-
tern match.
Flow control.
— Supports
IEEE 802.3X
for full-duplex.
— Multiple pause frame XON/XOFF.
Dual power design: 3.3 V I/O power and 2.5 V core
power.
0.22
µm
TSMC CMOS technology.
128-pin LQFP package.
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Overview
The ET1201 Ethernet controller is a cutting edge,
feature-rich, and cost-competitive single ASIC chip
solution for PC LAN on motherboard applications or
low cost NIC applications. The ET1201 eases server
processor utilization by optimizing throughput
between the NIC and PCI bus allowing data transfers
of up to at 200 Mbits/s in full-duplex mode, without
using the system CPU. The ET1201 contains
advanced power management features for low power
consumption including wake on LAN (WOL) and is
implemented using a low power 0.22
µm
design.
The ET1201 is ideal for LAN-on-motherboard solu-
tions, providing a manageable, integrated controller
to bring high speed Ethernet connectivity to the elec-
tronics of tomorrow.
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Agere Systems - Proprietary
ET1201 PCI Fast Ethernet Controller
Data Sheet
May 5, 2006
Table of Contents
Contents
Page
Features .................................................................................................................................................................... 1
Pin Information ..........................................................................................................................................................6
Pin List ...................................................................................................................................................................7
Host Bus Interface Control Logic .........................................................................................................................12
FIFO and Control Logic ........................................................................................................................................17
Interrupt Control ...................................................................................................................................................20
Power Management............................................................................................................................................. 20
Absolute Maximum Ratings .................................................................................................................................51
dc specifications ..................................................................................................................................................51
Power Consumption ............................................................................................................................................52
Figure 8. Write Back Status to Descriptor ............................................................................................................. 52
Table 11. LED Status .............................................................................................................................................18
Table 13. Power States ..........................................................................................................................................21
Table 83. Offset 14H—PHY Status (0000H) RO ....................................................................................................50
Table 84. Offset 19H—Power Control RW .............................................................................................................50
Table 85. Absolute Maximum Ratings ....................................................................................................................51
Table 86. dc Specifications .....................................................................................................................................51
Table 87. ET1201 Power Consumption ..................................................................................................................52
Table 88. LED On/Off Timing .................................................................................................................................54
Table 89. 10Base-T Normal Link Pulse Timing ......................................................................................................54
Table 90. Autonegotiation Fast Link Pulse Timing .................................................................................................55