Espi/Lpc Debug Connector - Seco COM-Express CCOMe-C96 User Manual

eSPI/LPC Debug Connector

eSPI/LPC Debug Connector
Pin Signal
1 LPC_CLK/ESPI_CK
3 LPC_RST#
5 LPC_AD0/ESPI_IO_0
7 LPC_AD1/ESPI_IO_1
9 LPC_AD2/ESPI_IO_2
11 LPC_AD3/ESPI_IO_3
13 LPC_FRAME#/ESPI_CS0#
inserted, this signal is derived by an eSPI to LPC bridge placed on carrier board
LPC_AD[0:3]: LPC address, command and data bus, bidirectional signal
LPC_FRAME#: LPC Frame indicator, active low output signal. This signal is used to signal the start of a new cycle of transmission, or the termination of existing
cycles due to abort or time-out condition.
SUS_STAT#: Signal indicating suspend status output, active low signal. It is used to notify LPC devices that the module is going to enter in one of possible ACPI
low-power states
LPC_DRQ0#: LPC serial DMA request input signal
LPC_SERIRQ#: LPC Serialised IRQ request, bidirectional signal
Otherwise, if eSPI interface is available from selected COM Express module, then following signals will be present:
ESPI_CK: eSPI Master Clock Output
ESPI_IO_[0:3]: eSPI Master Data Input / Outputs. These are bi-directional input/output signals used to transfer data between master and slaves.
ESPI_CS0#: eSPI Master Chip Select #0. Active low output signal.
ESPI_CS1#: eSPI Master Chip Select #1. Active low output signal.
ESPI_RESET#: eSPI Reset Signal for both master and slaves devices
ESPI_ALERT0#: eSPI signal used by eSPI slave to request service from the eSPI master
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.
CN15
Pin Signal
2 SUS_STAT#/ESPI_RESET#
4 +3.3V_RUN
6 LPC_DRQ0#/ESPI_ALERT0#
8 LPC_SERIRQ#/ESPI_CS1#
12 GND
14 GND
The COM Express card edge connector shares on the same pins both the LPC and
the eSPI interface. Please check the COM Express module to see whether LPC or eSPI
interface is made available.
The signals of these pins are first of all carried directly to an internal
dual row 6+7 pin header CN15, type NELTRON p/n 2208SM-14G-
E10-CR or equivalent, with the pinout shown in the table on the left.
If LPC bus is available from selected COM Express module, then following signals will
be present:
LPC_CLK: LPC Clock Output 33MHz
LPC_RST#: when jumper JP3 is inserted, this signal is derived by CB_RESET# signal or
simply by biasing it using a Ultra High Speed CMOS buffer. When jumper JP3 is not
43