CCOMe-965
CCOMe-965 - Rev. First Edition: 1.0 - Last Edition: 3.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
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3.3.20
SPI Flash socket
In case that an external Flash is needed, then on the carrier board it is provided an
8-pin SOIC socket for the housing of SPI Flashes.
Socket is type LOTES p/n ACA-SPI-004-K0 or equivalent, p. 1.27mm, with the
pinout shown in the table on the left.
Almost all signals on this socket come directly from COM Express connector CN1, with the
following exceptions:
SPI_WP#: this signal is tied, through a 10k
Ω
resistor, to SPI_POWER signal. This means that
when the Flash is powered, the protection from writing is automatically removed.
SPI_HOLD#: this signal too is tied, through a 10k
Ω
resistor, to SPI_POWER signal. This means that when the Flash is powered, the Hold condition of serial
communication is automatically removed.
3.3.21
LPC Pin header
It is possible to increase furthermore connectivity possibilities of CCOMe-965 carrier board
using the LPC signals coming out from COM Express card edge
connector, which are then carried out on a dual row, 14 pin, P2.54mm
standard pin header, with the pinout shown in the table on the left.
Almost all the signals available on this connector come out directly from the COM Express
connector; please check the related table for a description of the signals.
LPC_RST# signal is derived by CB_RST# signal, simply by biasing it using a Ultra High Speed
CMOS buffer.
SPI Flash socket - CN35
Pin Signal
Pin Signal
1
SPI_CS#
8
SPI_POWER
2
SPI_MISO
7
SPI_HOLD#
3
SPI_WP#
6
SPI_CLK
4
GND
5
SPI_MOSI
LPC Pin Header - CN30
Pin Signal
Pin Signal
1
LPC_DRQ0#
2
LPC_AD0
3
LPC_DRQ1#
4
LPC_AD1
5
LPC_SERIRQ
6
LPC_AD2
7
LPC_FRAME#
8
LPC_AD3
9
LPC_RST#
10
GND
11
LPC_CLK
12
GND
13
+3.3V_S
14
+3.3V_S