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.
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3.3.22
I2C EEPROM socket
In many applications it is useful to have a small non-volatile storage device, like an
EEPROM.
For this purpose, connected to I2C bus, there is an 8-pin SOIC socket type LOTES
p/n ACA-SPI-004-K0 or equivalent, p. 1.27mm, with the pinout shown in the table on the left.
Please notice that address lines (A0, A1 and A2) and Write Protect (WP) line have to be set
manually set by the customer using a dedicated switch (SW1), which is placed right near the I2C
EEPROM Socket.
Setting of these signals can be made according to the table on the left.
3.3.23
Pushbuttons
On the carrier board, there are four momentary pushbuttons (with contacts normally open) for the direct handling of Qseven
®
power management signals.
The first pushbutton, SW7, is placed on PWRBTN# signal. Upon the pressure of this pushbutton, the Qseven
®
module will perform a power up / power down
sequence.
The second pushbutton, SW8, is placed on SLP_BTN# signal. Upon the pressure of this pushbutton, the Qseven
®
module will enter in a sleep state (is such
states are supported).
The third pushbutton, SW9, is placed on RSTBTN# signal. Upon the pressure of this pushbutton, the Qseven
®
module will perform a reset.
The fourth pushbutton, SW10, is placed on LID_BTN# signal. Such a signal can be used by the Qseven
®
module to detect the opening / the closure of an external
lid switch, like those used to detect opening / closure of the notebooks. Upon changes in LID_BTN# state, the OS could trigger the transition of the module from
Working to Sleep status, or vice versa.
It is possible to manage the LID_BTN# signal also using dedicated jumper JP14, which is a standard
pin header, P2.54mm, 1x2 pin.
This same jumper can be used to manage an external, remote switch/pushbutton with contacts normally
open.
I2C EEPROM socket - CN5
Pin Signal
Pin Signal
1
A0
8
+3.3V_S
2
A1
7
WP
3
A2
6
GP0_I2C_CK
4
GND
5
GP0_I2C_DAT
SW1 Switch
ON Position
OFF Position
1
WP = 0
WP = 1
2
A0 = 0
A0 = 1
3
A1 = 0
A1 = 1
4
A2 = 0
A2 = 1
JP14 position LID_BTN# status
Not Inserted
Normal working
Inserted
Tied to GND
