Venice Single Board Computer Operating Manual
SPI Serial Peripheral Interface
An SPI serial peripheral interface is available through a connector. The interface
includes 121 ohm series resistors for short circuit protection, operates up to
50MHz, and supports both interrupt and polled transactions.
More information can be found at the following links:
●
http://trac.gateworks.com/wiki/SPI
Gateworks System Controller
The GSC Gateworks System Controller is a custom battery-backed micro-controller
designed by Gateworks to implement many of the embedded features found on the
board. This includes features such as real time clock with battery backup, system
temperature and voltage monitor, configuration EEPROM, and digital I/O. Software
information can be found at
http://trac.gateworks.com/wiki/gsc
Real Time Clock with Battery Backup
The real time clock is provided by the Gateworks System Controller. The
Gateworks System Controller emulates an industry standard
to support the real time clock. This includes a 32-bit
counter that counts seconds for determining time of day, week, month, and year.
The I2C address for the real time clock is 0x68h. The real time clock is battery
backed to retain time information when power is removed from the board. The
battery is a 12.5mm BR1225 coin cell installed in a surface mount socket.
System Temperature and Voltage Monitor
The system temperature and voltage monitor is provided by the Gateworks
System Controller. The Gateworks System Controller does not emulate a specific
device to support the temperature and voltage monitoring functions. The I2C
address for the temperature and voltage monitor is 0x29h. The temperature and
voltage parameters monitored by the Gateworks System Controller are listed in
the table below. The GSC mapping includes the value referenced by the software
driver written for the Gateworks System Controller. Software information is
available on the following Gateworks Wiki page:
http://trac.gateworks.com/wiki/gsc
GATEWORKS.COM 3026 S. Higuera St San Luis Obispo, CA 93401
P:(805)781-2000
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