Venice Single Board Computer Operating Manual
Analog
Input
Input Divider
R1/(R1+R2)
Description
0
10K/20K
Board Level Operating Temperature
1
22.1K/23.1K
Board Level Input Operating Voltage
2
10K/32.1K
ADC1
3
10K/20K
ADC2
4
None
1.1V MX8M Mini DRAM
6
None
1.2V Core Mipi
7
None
1.0V RGMII Phy
8
10K/20K
2.5V RGMII Phy
9
10K/20K
3.3V Primary Supply
12
None
0.95V CPU
13
None
1.8V LPDDR4
14
None
Reserved
15
None
Reserved
Gateworks System Controller Monitored Temperature and Voltages
Configuration EEPROM
The configuration EEPROM is provided by the Gateworks System Controller. The
Gateworks System Controller emulates an Atmel 24C04. The EEPROM is
divided into a general purpose section available to the application and a section
reserved by Gateworks for storing various system configuration parameters. The
I2C address for the configuration EEPROM is 0x50h.
Fan Speed Control
The fan speed function controls the rotational speed of a fan though the J8
connector. Fan speed control increases fan service life and decreases system
acoustic airflow noise. The Gateworks System Controller supports up to six
temperature set points. The fan speed is set to off until operating temperature
reaches the first set point. When the operating temperature reaches the first set
point, the fan speed is set to 50%. The fan speed then increases 10% as the
operating temperature climbs through each additional set point. The fan
connector also supports a tachometer feedback signal through the Gateworks
System Controller to ensure the rotational integrity of the fan.
Additional System Level Functions
The Gateworks System Controller also supports encryption key and software
programmable hardware shut-down and wake-up for the highest possible power
conservation.
Battery Backup
The Gateworks System Controller must be powered at all times if support
features such as continuous real time clock, and programmable hardware sleep
and wake-up are required. This power is supplied by a coin cell battery when the
SBC is powered down. The Gateworks System Controller seamlessly switches
from the coin cell battery to input power when the SBC is powered on to extend
coin cell battery life. The coin cell socket includes both a reverse charge
protection resistor and a current blocking diode to provide two levels of protection
required for some agency approvals.
GATEWORKS.COM 3026 S. Higuera St San Luis Obispo, CA 93401
P:(805)781-2000
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