CCOMe-C96
CCOMe-C96 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by C.M. Copyright © 2021 SECO S.p.A.
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LPC /eSPI interface, in addition to eSPI/LPC Debug Connector CN15, is
carried to the rest of the carrier board and its routing is managed by JP3
and JP4 selection 2-way jumpers.
JP4 selection jumper is used to enable / disable the eSPI/LPC
interface for the rest of the carrier board, meaning that when not
inserted this interface is made available only at CN15 debug
connector.
If the eSPI/LPC interface is enabled with JP4 inserted, JP3 is the selector for the type of interface coming from COM Express module. When not inserted, meaning
that eSPI interface is available from COM Express module, LPC bus is implemented by using an eSPI-to-LPC bridge. Otherwise, when inserted, meaning
that LPC bus is directly available, without the need of the bridge. For both cases, on this LPC bus are then available a Dual LPC UART bridge, which allows
the implementation of two legacy COM Ports, and a CPLD, which manages four seven-segment LCD display, used to show the POST codes transmitted on
ports 80h and 84h.
COM ports and RS232 ports Internal pin Headers
Interfaced to the LPC Bus coming from the COM Express module, on
CCOMe-C96 Carrier board there is a Dual LPC UART bridge, which allows
the implementation of two legacy COM Ports.
These two COM ports are made externally accessible through two
multistandard transceivers, which allow using them in RS-232, RS-422 or
RS-485 mode.
These ports are available on dedicated connector CN17,
which is an internal 9-pin standard male pin header, p 2.54
mm, 5+4 pin, h= 6mm, type NELTRON p/n 2213S-10G-E06 or equivalent.
Selection of working mode is made using jumpers JP5 and JP6,
which are standard pin headers, P2.54mm, 1x3 pin.
According to the working mode selected via jumpers JP5 and JP6, the
pinout of the connector (a dual row p.254mm 9-pin header) is as described
in the left table.
JP4 position
JP3 position
eSPI/LPC interface
Not inserted
Not Care
eSPI/LPC interface disabled
Inserted
Not inserted
eSPI interface from COM Express
™
module
Inserted
Inserted
LPC interface from COM Express
™
module
COM ports Internal pin Header - CN17
Pin Signal RS-232 mode
Signal RS-422 mode
Signal RS-485 mode
1
COM1_RxD
2
COM2_RxD
3
COM1_TxD
COM1_Tx-
COM1_Rx-/COM1_Tx-
4
COM2_TxD
COM2_Tx-
COM2_Rx-/COM2_Tx-
5
GND
7
COM1_RTS#
/
8
COM2_RTS#
/
9
COM1_CTS#
COM1_Rx-
10
COM2_CTS#
COM2_Rx-