82C881 Datasheet, PDF (7/46 Pages) List of Unclassifed Manufacturers – FireLink 1394 OHCI Link Controller

FireLink 1394 OHCI
®
82C881
3.0 Signal Definitions
3.1 Terminology/Nomenclature Conventions
The "#" symbol at the end of a signal name indicates that the active, or asserted state occurs when the signal is at a low
voltage level. When "#" is not present after the signal name, the signal is asserted when at the high voltage level.
The terms assertion and negation are used extensively. This is done to avoid confusion when working with a mixture of active
low and active high signals. The term assert, or assertion indicates that a signal is active, independent of whether that level is
represented by a high or low voltage. The term negate, or negation indicates that a signal is inactive.
The tables in this section use several common abbreviations. Table 3-1 lists the mnemonics and their meanings. Note that
TTL/CMOS/Schmitt-trigger levels pertain to inputs only. Outputs are driven at CMOS levels.
Table 1. Signal Definitions Legend
Mnemonic
Description
Analog
CMOS
Dcdr
Ext
G
I
Int
I/O
Mux
NIC
O
OD
P
PD
PU
S
S/T/S
TTL
Analog-level compatible
CMOS-level compatible
Decoder
External
Ground
Input
Internal
Input/Output
Multiplexer
No Internal Connection
Output
Open drain
Power
Pull-down resistor
Pull-up resistor
Schmitt-trigger
Sustain Tristate
TTL-level compatible
912-2000-031
Revision: 1.0
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