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2020
congatec
AG
DSTXm10
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8.7
PWR_OK
The PWR_OK signal is a high-active input from the main power supply to the module and it indicates whether the power is good. The PWR_OK
signal is sourced from the onboard DC-DC regulator by default. For debugging, you can pull-up the PWR_OK signal to 3.3 V with a 1 K resistor.
8.8
Module Type Detection
The COM Express™ Specification defined four signals that indicate the pinout type of the module connected to the carrier board. These
pins ‘TYPE0#’, ‘TYPE1#’, ‘TYPE2#’ and ‘TYPE10#’ are either left open (NC), strapped to ground (GND) or connected to 12 V by the module, to
encode the pinout type according to the following table. For more information, refer to the COM Express™ Specification.
Table 25 Module Type Detection Pinout Description
Module Type
Pin TYPE0#
Pin TYPE1#
Pin TYPE2#
Pin TYPE10#
Comment
Module Type 6
GND
NC
NC
NC
COM Express Specification 2.0 / 3.0
Module Type 7
GND
N.C
GND
N.C
COM Express Specification 3.0
Module Type 10
X (don't care)
X (don't care)
X (don't care)
47k PD
COM Express Specification 2.0
Note
If the conga-STX7 detects an incompatible module pinout, an onboard logic prevents the board from powering up the whole system by
controlling the ‘PS_ON#’ signal of the ATX power supply.
