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.
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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, 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
COM Express modules foresee a maximum of 2 Serial Ports with only Tx and Rx signals (SER #0 and
SER #1).
These two ports are managed though a single RS-232 transceiver, type MaxLinear p/n SP3232EEY-L,
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.
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
RS232 Internal pin Header- CN26
Pin Signal
Pin Signal
1
UART0_232_RX
2
UART1_232_RX
3
UART0_232_TX
4
UART1_232_TX
5
GND
7
N.C.
8
N.C.
9
N.C.
10
N.C.
