Networking Silicon — 82551QM
4.0
4.1
Table 2.
Signal Descriptions
Signal Type Definitions
Signal Type Descriptions
Type
IN
OUT
TS
Input
Output
Tri-State
Name
Description
The input pin is a standard input only signal.
The output pin is a Totem Pole Output pin and is a standard
active driver.
The tri-state pin is a bidirectional, input/output pin.
The sustained tri-state pin is an active low tri-state signal owned
and driven by one agent at a time. The agent asserting the STS
pin low must drive it high at least one clock cycle before floating
the pin. A new agent can only assert an STS signal low one
clock cycle after it has been tri-stated by the previous owner.
The open drain pin allows multiple devices to share this signal
as a wired-OR.
The analog input pin is used for analog input signals.
The analog output pin is used for analog output signals.
The bias pin is an input bias.
Digital power or ground for the device.
Analog power or ground for the device.
STS
Sustained Tri-State
OD
AI
AO
B
DPS
APS
Open Drain
Analog Input
Analog Output
Bias
Digital Power
Supply
Analog Power
Supply
Datasheet
7
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