AM79C978 Advanced Micro Devices, AM79C978 Datasheet - Page 24
AM79C978
Manufacturer Part Number
AM79C978
Description
Single-Chip 1/10 Mbps PCI Home Networking Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C978.pdf
(261 pages)
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PIN DESIGNATIONS
Listed By Driver Type
The following table describes the various types of out-
put drivers used in the Am79C978 controller. All I
I
For typical 5 V DC characteristics, please refer to DC
Characteristics Over Commercial Operating Ranges
section.
24
OH
LED
O6
OD6
TS3
TS6
STS6
OMII1
OMII2
TSMII
values shown in the table apply to 3.3 V signaling.
Driver Name
LED
Totem Pole
Open Drain
Tri-State
Tri-State
Sustained Tri-State
Tri-State
Tri-State
Tri-State
Type
OL
and
Am79C978
A sustained tri-state signal is a low active signal that is
driven high for one clock period before it is left floating.
TX is a differential output driver. Its characteristics and
those of XTAL2 output are described in the DC CHAR-
ACTERISTICS section.
I
OL
12
(mA)
6
6
3
6
6
4
4
4
I
OH
0.4
0.4
NA
2
2
2
4
4
4
(mA)
Load (pF)
390
470
50
50
50
50
50
50
50
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