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Net naming conventions

General naming

Net names are composed of an optional logic inversion prefix, a base identifier, abbreviated attributes, and optional suffixes.

They may contain uppercase ASCII letters, underscores, and (arabic) numerals.

Prefix, base identifier, individual attributes, and suffixes are separated by underscores, which therefore should not appear within netnamen other than as such separators.

This page is a bit more elaborated, and rules there that do not contradict rules here might be worth to follow.

Naming rules

Ordering

Nets derived from another net which keep their base identifier but have modified prefixes, attributes, or suffixes, retain their remaining set of identifiers and have any new identifiers appended to the existing ones.

Where this rule does not apply, prefixes, attributes, and suffixes are ordered alphabetically.

Specific identifiers

Prefixes

Analog ...
A
Digital ...
D
Inverse logic
! (not separated by underscore)
Power ...
P

Special base identifiers

Adapter (e.g. Power-)
ADP
Battery
BAT
Crystal
XTAL
Demultiplexer
DMUX
Display
DPY
Key(-board) Multiplexer
KMUX
Microcontroller
MCU
Multiplexer
MUX
Multiplexer/Demultiplexer
MDX
Power supply, negative
PN
Power supply, positive
PP
Power supply, reference potential (ground)
GND
Shield
SHLD

Attributes

Bus
BUS
Busy
BSY
Clock
CLK
Data
DTA
Data Input, Output, Bidirectional, Clock
DI, DO, DTA, DCLK
Demultiplexer
DMUX
Disable
DIS
Do not connect / Do not use
DNU
Down
DN
Enable
EN
Fault
FAULT
Filter / Filtered
FILT
I2C Clock, I2C Data
SCL, SDA
Indicator
IND
Input
IN
Input/Output
IO
Interrupt
INTRPT
Latch / Latched
LCH
Load
LD
Multiplexer / Multiplexed
MUX
Multiplexer/Demultiplexer
MDX
Not connected
NC
Output
OUT
Protection
PROT
Ready
RDY
Receive
RX
Reference
REF
Reverse current protected / protection
RCPROT
Reset
RST
Select
SEL
Sense
SENS
Shield
SHLD
Source
SRC
SPI MISO, MOSI, Chip select
MISO, MOSI, CS
Switched
SW
Transmit
TX
Up
UP

Suffixes

Differential pair, positive, negative
P, N
Frequency
16MHZ, 33KHZ, 11059KHZ
Voltage
5V, 3V3, 0V6

Component designators

Beside those designators defined in EloInv, the following designators shall be used.

Connectors, headers, etc

Connector
J
Jumper
JP
Socket (for components, not cables)
SKT
Test point, GND
TG
Test point, other
TP
Test point, supply voltage
TP

Logbook

Last page update: 2016-11-16