![background image](http://html1.mh-extra.com/html/xilinx/kria-k26-som/kria-k26-som_design-manual_3372861008.webp)
Table 1: SOM240 Signal Naming Conventions
Signal
Description
Module (M)
The SOM, in this case the K26 SOM
Carrier card (C)
The board that the SOM is plugged into is called the carrier card
C2M
Signal names with
C2M
indicate that the signal is driven by the carrier card and received by
the SOM
M2C
Signal names with
M2C
indicate that the signal is driven by the SOM and received by the
carrier card
_P
The postfix
_P
on differential signal pairs indicates the positive component of a differential
signal
_N
The postfix
_N
on differential signal pairs indicates the negative component of a differential
signal
_L
The postfix
_L
on a single-ended signal indicates an active-Low signal. This is used for the
connector pinouts only. The postfix _B is also used to indicate an active-Low signal.
Table 2: Legend for Connector Pinouts
Example
SOM240 Connector
Function
GND
Both SOM240_1 and SOM240_2
Ground pins
VCC_SOM
Both SOM240_1 and SOM240_2
Power connection pins
MIO35
SOM240_1
MIO 501 bank pins
MIO58
SOM240_1
MIO 502 bank pins
JTAG_TMS_C2M
SOM240_1
Configuration and control pins
GTR_DP1_M2C_P
SOM240_1
PS-GTR transceiver pins
HPA04_P
SOM240_1
HPA pins
HDA00_CC
SOM240_1
HDA pins
HPB15_CC_P
SOM240_2
HPB pins
HPC07_P
SOM240_2
HPC pins
HDB12
SOM240_2
HDB pins
HDC00_CC
SOM240_2
HDC pins
GTH_DP2_C2M_P
SOM240_2
GTH transceiver pins
SOM240_1 Connector Pinout
The SOM240_1 connector provides access to two MIO banks (MIO501, MIO502), HPIO bank 66
(HPA), HDIO bank 45 (HDA), and the PS-GTR transceivers (MIO505). It also provides sideband
signals for configuration and operation of the board.
Chapter 2: Electrical Design Considerations
UG1091 (v1.0) April 20, 2021
Carrier Card Design for Kria SOM
8