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Chapter 15. General Routing Guidelines
15.1
Signal Name Conventions
The following conventions are used in describing the signals for Jetson TX2 NX:
Signal names use a mnemonic to represent the function of the signal. For example,
Secure Digital Interface #3 Command signal is represented as
to distinguish it from other text. All active-low signals are identified by an asterisk (*) after
the signal name. For example,
signals do not have the underscore-N (_N) after the signal names. For example,
indicates an active-high signal. Differential signals are identified as a pair with
SDMMC_CMD
the same names that end with _P and _N or for USB 2.0, DP and DN (for positive and
negative, respectively). For example,
signal pair.
The signal I/O type is represented as a code to indicate the operational characteristics of
the signal. The following table lists the I/O codes used in the signal description tables.
Table 15-1.
Signal Type Codes
Code
A
DIFF I/O
DIFF IN
DIFF OUT
I/O
I
O
OD
I/OD
P
NVIDIA Jetson TX2 NX
SYS_RESET*
CSI_0_D0_P
Definition
Analog
Bidirectional Differential Input/Output
Differential Input
Differential Output
Bidirectional Input/Output
Input
Output
Open Drain Output
Bidirectional Input / Open Drain Output
Power
SDMMC_CMD
indicates an active-low signal. Active-high
and
indicate a differential
CSI_0_D0_N
, written in bold
DG-10141-001_v1.1 | 71
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