am79c989 Advanced Micro Devices, am79c989 Datasheet - Page 9

• Manufacturer Part Number: am79c989
• Description: Quad Ethernet Switching Transceiver
• Manufacturer: Advanced Micro Devices

PIN DESIGNATIONS
Listed by Pin Number
Listed by Group
QuASI Interface
10BASE-T Signal Pins
AUI Signal Pins
Pin No.
Pin Number
19 & 18
22 & 21
25 & 24
28 & 27
31 & 30
33 & 32
36 & 35
38 & 37
13 & 12
16 & 15
10
11
1
2
3
4
5
6
7
8
9
10
11
2
3
4
5
QRST/STRB
QRX_VALID
QRX_DATA
QTX_DATA
Pin Name
QTX_EN
QINT/CI-
PCI/CI+
VDDIO
REXT
SCLK
VSS
QRX_VALID
QRX_DATA
QTX_DATA
Pin Name
QINT/CI-
QTX_EN
PCI/CI+
TXD0
TXD1
TXD2
TXD3
RXD0
RXD1
RXD2
RXD3
DO
DI
Pin No.
18
12
13
14
15
16
17
19
20
21
22
Pin Type
Output
Output
Output
Output
Output
P R E L I M I N A R Y
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
Pin Name
VSSAUI
VDDTX
VSSTX
TXD0+
TXD1+
TXD0-
TXD1-
DO+
DO-
DI+
DI-
Am79C989
Port 0 10BASE-T differential driver
Port 1 10BASE-T differential driver
Port 2 10BASE-T differential driver
Port 3 10BASE-T differential driver
Port 0 10BASE-T differential receiver
Port 1 10BASE-T differential receiver
Port 2 10BASE-T differential receiver
Port 3 10BASE-T differential receiver
AUI differential collision receiver negative signal or Interrupt output
signal (open drain)
AUI differential collision receiver positive signal or single-ended
Pseudo AUI receiver
Attachment Unit Interface differential data receiver
Attachment Unit Interface differential output driver
Multiplexed serial receive data
PHYAD 4 internal address input upon reset
Multiplexed receive data valid enable
PHYAD 3 internal address input upon reset
Multiplexed serial transmit data
Multiplexed transmit enable
Pin No.
23
24
25
26
27
28
29
30
31
32
33
Pin Name
VDDTX
VDDTX
VSSTX
RXD0+
TXD3+
RXD1+
TXD2+
RXD0-
RXD1-
TXD2-
TXD3-
Pin Description
Pin No.
34
35
36
37
38
39
40
41
42
43
44
QRX_CRS
Pin Name
QCLSN
VSSRX
RXD2+
RXD3+
VSSIO
RXD2-
RXD3-
MDIO
MDC
VDD
9