Spi Flash Socket - Seco COM-Express CCOMe-965 User Manual

3.3.20 SPI Flash socket

SPI Flash socket - CN35
Pin Signal Pin
1 SPI_CS# 8
2 SPI_MISO 7
3 SPI_WP# 6
4 GND 5
SPI_HOLD#: this signal too is tied, through a 10kΩ 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
LPC Pin Header - CN30
Pin Signal Pin
1 LPC_DRQ0#
3 LPC_DRQ1#
5 LPC_SERIRQ
7 LPC_FRAME#
9 LPC_RST#
11 LPC_CLK
13 +3.3V_S
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.
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.
Signal
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.
SPI_POWER
Almost all signals on this socket come directly from COM Express connector CN1, with the
SPI_HOLD#
following exceptions:
SPI_CLK
SPI_WP#: this signal is tied, through a 10kΩ resistor, to SPI_POWER signal. This means that
SPI_MOSI
when the Flash is powered, the protection from writing is automatically removed.
Signal
2 LPC_AD0
4 LPC_AD1
6 LPC_AD2
8 LPC_AD3
10 GND
12 GND
14 +3.3V_S
It is possible to increase furthermore connectivity possibilities of CCOMe-965 carrier board
using the LPC signals coming out from COM Express
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.
card edge
52