Rs232 Ports Internal Pin Headers; Ccome-C79 - Seco COM-Express CCOMe-C79 User Manual

JP4 position JP3 position
Not inserted Not Care
Inserted Not inserted
Inserted Inserted
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, this LPC bus is carried to BMC connector CN58 (par. 3.3.18), and to a CPLD, which manages four seven-segment LCD display, used to show the
POST codes transmitted on ports 80h and 84h.

RS232 ports Internal pin Headers

RS232 Internal pin Header- CN26
Pin Signal Pin
1 UART0_232_RX 2
3 UART0_232_TX 4
5 GND
7 N.C. 8
9 N.C. 10

CCOMe-C79

CCOMe-C79 - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by E.S. Copyright © 2021 SECO S.p.A.
eSPI/LPC interface
eSPI/LPC interface disabled
eSPI interface from COM Express
LPC interface from COM Express
COM Express modules foresee a maximum of 2 Serial Ports with only Tx and Rx signals (SER #0 and
SER #1).
Signal
These two ports are managed though a single RS-232 transceiver, type MaxLinear p/n SP3232EEY-L,
UART1_232_RX
and the output is available on 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.
UART1_232_TX
N.C.
N.C.
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.
™
module
JP4 selection jumper is used to enable / disable the eSPI/LPC
interface for the rest of the carrier board, meaning that when not
™
module
inserted this interface is made available only at CN15 debug
47