AM79C989JCT Advanced Micro Devices, AM79C989JCT Datasheet - Page 2

• Manufacturer Part Number: AM79C989JCT
• Description: Quad Ethernet Switching Transceiver (QuEST)
• Manufacturer: Advanced Micro Devices

BLOCK DIAGRAM
2
QRST/STRB
QRX_VALID
QRX_DATA
QTX_DATA
QRX_CRS
QTX_EN
QCLSN
System Interface
MDIO
SCLK
MDC
v3
Elasticity FIFO
Collision
Jabber
Timer
Detect
Carrier Detect
Decode and
Manchester
Manchester
P R E L I M I N A R Y
Encoder
Link Detect
Management Interface
10BASE-T Transceiver 0
Register Block
Am79C989
Attachment Unit Interface
10BASE-T Transceiver 1
10BASE-T Transceiver 2
10BASE-T Transceiver 3
Polarity Detection/
State Machine
Link/Auto Neg
Correction
Collision
Detect
Line Receiver with
Line Driver with
Wave Shaping
Smart Squelch
AUI Transmitter
AUI Receiver
AUI Collision
with Squelch
Squelch
Network Interface
21173B-1
TXD2+
TXD2-
RXD2+
RXD2-
TXD3+
TXD3-
RXD3+
RXD3-
PCI/CI+
QINT/CI-
TXD0+
TXD0-
RXD0+
RXD0-
REXT
TXD1+
TXD1-
RXD1+
RXD1-
DO+
DO-
DI+
DI-