Dp++ Connectors; Post Code Display; Buttons - Seco CCHPC-C78-C User Manual

DP++ Connectors

Multimode DP Connectors
Pin Signal Pin
X
1 DDI _PAIR0+
3 DDI X _PAIR0-
5 GND
7 DDI X _PAIR2+
9 DDI X _PAIR2-
11 GND
13 DDI X _DDC_AUX_SEL
X
15 DDI _SCL_AUX+
17 DDI X _SDA_AUX-
19 GND
For debugging purposes, it is available a display made by 2x 7-segment LED display, type Kingbright KCSC02-105 or equivalent.
The management of this display is done using an NXP PCA9535PW I/O expander, driven through the COM HPC

Buttons

On the carrier board, there are four momentary pushbuttons (with contacts normally open) for the direct handling of COM HPC
The first pushbutton, M1, is placed on RSTBTN# signal. Upon the pressure of this pushbutton, the COM HPC
The second pushbutton, M2, is placed on PWRBTN# signal. Upon the pressure of this pushbutton, the COM HPC
down sequence.
The third pushbutton, M3, is placed on LID# signal. Such a signal can be used by the COM HPC
lid switch, like those used to detect opening / closure of the notebooks. Upon changes in LID # state, the OS could trigger the transition of the module from Working
to Sleep status, or vice versa.
The fourth pushbutton, M4, is placed on SLEEP# signal. Upon the pressure of this pushbutton, the COM HPC
CCHPC-C78-C
CCHPC-C78-C - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.O. - Reviewed by E.S. Copyright © 2023 SECO S.p.A.
CN52, CN53, CN54
Signal
2 GND
4 DDI X _PAIR1+
X
6 DDI _PAIR1-
8 GND
10 DDI X _PAIR3+
X
12 DDI _PAIR3-
14 DDI X _CEC
16 GND
18 DDI X _HPD
20 +3.3V_RUN
®
According to COM HPC specifications, client modules pinout defines three Digital Display
interfaces (DDI), that can be used to carry out DisplayPort and TMDS (HDMI/DVI) interface.
On HC78 Carrier board, these interfaces (DDI0, DDI1 and DDI2 ) are
carried to as many standard DisplayPort Connectors, CN52,CN53
and CN54, type WINNING p/n WDPE-20F3L1BU3 or equivalent, with
the pinout shown in the following table.
All these interfaces support DP++, so it is possible to connect also HDMI and DVI displays by
using external adapters.
Please be aware that the CEC signals are connected on the connectors, but they are fixed low
through a 5.1MOhm resistor, since this signal is not managed by the COM HPC
modules.

POST Code Display

® Client module to detect the opening / the closure of an external
®
dedicated USB PD I2C Bus.
®
power management signals.
®
Client module will perform a reset.
®
Client module will perform a power up / power
®
Client module will enter in a sleep state.
®
client
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