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Электронный компонент: Am79C988BJC

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PRELIMINARY
This document contains information on a product under development at Advanced Micro Devices. The information
is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed
product without notice.
Publication# 19880
Rev: B Amendment/+2
Issue Date: November 1997
Am79C988A
Quad Integrated Ethernet Transceiver (QuIETTM)
DISTINCTIVE CHARACTERISTICS
s
Four independent 10BASE-T transceivers
compliant with IEEE 802.3 Section 14
(10BASE-T MAUs)
s
Direct interface with AMD's Am79C983A IMR2TM
repeater device
s
On-chip filtering
-- Eliminates external transmit and receive filters
-- Meets IEEE 802.3 (Section 14.3) electrical
requirements
-- Enables port switching when used with the IMR2
device
s
Automatic polarity detection and correction
s
Serial management interface allows transfer of
command and status data between the QuIET
device and a controller (IMR2 or other device)
s
Standard Ethernet (Normal) and Full-Duplex
modes
s
Extended distance option to accommodate
lines longer than 100 meters
s
Test functions provided for Loopback, Link Test,
Reverse Polarity, and Jabber
s
44-pin PLCC CMOS device with a single 5-V
supply
GENERAL DESCRIPTION
The Am79C988A Quad Integrated Ethernet Transceiver
(QuIET) device consists of four independent 10BASE-T
transceivers which are compliant with the IEEE 802.3
Section 14 (
Medium Attachment Unit for 10BASE-T
Cabling
) standard. When combined with AMD's
Integrated Multiport Repeater 2 (IMR2TM) chip, the
QuIET device provides a system-level solution to
designing a managed 10BASE-T repeater.
The QuIET device includes on-chip filtering for both
transmit and receive functions, thus eliminating the
need for external filters. On-chip filtering meets IEEE
802.3 (Section 14.3) electrical requirements. The
QuIET device provides automatic polarity detection and
correction and can operate in either normal or full-
duplex mode.
The QuIET device interfaces directly with the Pseudo
AUI (PAUITM) ports on the IMR2 (Am79C983A) device
and can also be connected to standard AUI ports. Com-
mand and status data are exchanged with the IMR2
device via a serial management interface. Port switch-
ing can be easily implemented with the IMR2/QuIET
chipset to move individual ports between multiple Ether-
net segments under software control.
For application examples on building fully-managed
repeaters using the QuIET and IMR2 devices, refer to
AMD's
IMR2 Technical Manual
(PID 19898A).
The QuIET chip is packaged in a 44-pin plastic leaded
chip carrier (PLCC). The device is fabricated in CMOS
technology and requires a single 5-V supply.
2
Am79C988A
P R E L I M I N A R Y
BLOCK DIAGRAM
QuIET Device
PDO[0]
PAUI Port
Line Drivers
and Receivers
PDO Squelch
Line Driver and
Wave-Shaping
TXD+
TXD-
TXD[0]+
TXD[0]-
PDI[0]
PCI[0]
PDO[1]
PAUI Port
Line Drivers
and Receivers
PDO Squelch
PDI[1]
PCI[1]
PDO[2]
PAUI Port
Line Drivers
and Receivers
PDO Squelch
PDI[2]
PCI[2]
PDO[3]
PAUI Port
Line Drivers
and Receivers
PDO Squelch
PDI[3]
PCI[3]
Internal Bias Reference
and Phase-Lock Loop
Serial Management Port
Control and Status
REXT
SDATA
DIR
CLK
RST
Collision, Loopback,
Jabber and Link Test
Line Receiver and
Smart Squelch
RXD+
RXD-
RXD[0]+
RXD[0]-
Line Driver and
Wave-Shaping
TXD+
TXD-
TXD[1]+
TXD[1]-
Line Receiver and
Smart Squelch
RXD+
RXD-
RXD[1]+
RXD[1]-
Line Driver and
Wave-Shaping
TXD+
TXD-
TXD[2]+
TXD[2]-
Line Receiver and
Smart Squelch
RXD+
RXD-
RXD[2]+
RXD[2]-
Line Driver and
Wave-Shaping
TXD+
TXD-
TXD[3]+
TXD[3]-
Line Receiver and
Smart Squelch
RXD+
RXD-
RXD[3]+
RXD[3]-
19880B-1
Am79C988A
3
P R E L I M I N A R Y
RELATED AMD PRODUCTS
Part No.
Description
Am79C981
Integrated Multiport Repeater+ (IMR+TM)
Am79C982
b
asic Integrated Multiport Repeater (
b
IMRTM)
Am79C983A
Integrated Multiport Repeater 2 (IMR2TM)
Am79C987
Hardware Implemented Management Information Base
(HIMIBTM)
Am7990
Local Area Network Controller for Ethernet (LANCE)
Am7996
IEEE 802.3/Ethernet/Cheapernet Transceiver
Am79C90
CMOS Local Area Network Controller for Ethernet (C-LANCE)
Am79C98
Twisted Pair Ethernet Transceiver (TPEX)
Am79C100
Twisted Pair Ethernet Transceiver Plus (TPEX+)
Am79C900
Integrated Local Area Communications Controller (ILACCTM)
Am79C940
Media Access Controller for Ethernet (MACETM)
Am79C960
PCnetTM-ISA Single-Chip Ethernet Controller (for ISA bus)
Am79C961
PCnetTM-ISA+ Single-Chip Ethernet Controller for ISA (with Microsoft Plug n' Play Support)
Am79C961A
PCnetTM-ISA II Full Duplex Single-Chip Ethernet Controller for ISA
Am79C965
PCnetTM-32 Single-Chip 32-Bit Ethernet Controller
Am79C970
PCnetTM-PCI Single-Chip Ethernet Controller (for PCI bus)
Am79C970A
PCnetTM-PCI II Full Duplex Single-Chip Ethernet Controller (for PCI bus)
Am79C974
PCnetTM-SCSI Combination Ethernet and SCSI Controller for PCI Systems
4
Am79C988A
P R E L I M I N A R Y
CONNECTION DIAGRAM
1 44 43 42
5
4
3
2
6
41 40
7
8
9
10
11
12
13
14
15
16
17
23 24 25 26
19 20 21 22
18
27 28
39
38
37
36
35
34
33
32
31
30
29
DV
SS
RST
REXT
TEST
DIR
CLK
SDATA
DV
DD
TXD3+
TXD3-
AV
SS
PDI0
PDO0
AV
DD
TXD0+
TXD0-
AV
SS
TXD1+
TXD1-
AV
DD
TXD2+
TXD2-
RXD3-
RXD3+
AV
SS
RXD2-
RXD2+
AV
DD
RXD1-
RXD1+
AV
SS
RXD0-
RXD0+
PCI0
PDO1
PDI1
PCI1
PDO2
PDI2
PDO3
PDI3
PCI2
PCI3
DV
SS
Am79C988A
19880B-2
Am79C988A
5
P R E L I M I N A R Y
LOGIC DIAGRAM
LOGIC SYMBOL
Ports
PAUI
TP
TP
TP
TP
Serial
Interface
PAUI
PAUI
PAUI
19880B-3
PDO
PDI
PCI
DIR
SDATA
CLK
RST
TXD+
TXD-
RXD+
RXD-
DV
SS
AV
SS
DV
DD
AV
DD
Twisted
Pair Ports
(4 Ports)
Pseudo Attachment
Unit Interface
(PAUI) Ports
(4 Ports)
Am79C988
Serial
Management
Interface
A
19880B-4