Seco Qseven CQ7-A30 User Manual page 59

3.3.20 SPI Pin header
SPI Pin Header - CN7
Pin Signal Pin
1 +3.3V_S
3 SPI_CS0#
5 SPI_CS1#
7 1-Wire_Bus
9 GND
3.3.21 SPI Flash socket
SPI Flash socket - CN6
Pin Signal Pin
1 SPI_CS0# 8
2 SPI_MISO 7
3 SPI_WP# 6
4 GND 5
SPI_HOLD#: this signal too is tied, through a 4k7Ω resistor, to +3.3V_S power rail. This means that when the Flash is powered, the Hold condition of serial
communication is automatically removed.
CQ7-A30
CQ7-A30 - Rev. First Edition: 1.0 - Last Edition: 2.0 - Author: S.B. - Reviewed by G.G. Copyright © 2016 SECO S.r.l.
Signal
2 +3.3V_S
4 SPI_MOSI
6 SPI_MISO
8 SPI_CLK
10 GND
For the cases when an external Flash is needed, 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.
+3.3V_S
Almost all signals on this socket come directly from Qseven
SPI_HOLD#
following exceptions:
SPI_CLK
SPI_WP#: this signal is tied, through a 4k7Ω resistor, to +3.3V power rail. This means that when
SPI_MOSI
the Flash is powered, the protection from writing is automatically removed.
It is possible to use SPI interface, coming out from Qseven
connector, for the connection of external SPI Devices (like EEPROM or Flash
devices, but any kind of SPI device can be connected).
For this purpose, it is available a dual row, 10 pin, P2.54mm standard pin header, with the
pinout shown in the table on the left.
On this pin header is also available the General Purpose 1-Wire signal. Please be aware, to
avoid malfunctioning, that this signal is available only when JP5 jumper is set in position 1-2
(please check par.3.3.3)
®
card edge
®
Card Edge connector, with the
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