I2C Communication; System Monitor/Current Sense; I2C Bus System; I2C_En_Fmc Controlled Functions - Enclustra Mars EB1 Base Board User Manual

6.6

I2C Communication

There are several I2C devices on the Mars EB1 base board, connected to the I2C communication lines. These
are presented in Table 25.
Note that the I2C signals connected to the Mars connector address other I2C devices equipped on the Mars
module.
Board
Reference Function
J200 Mars module
U300 System controller
U1500 System monitor
U800 User EEPROM
J1104 Anios I/O connector A
Table 25: I2C Bus System
The following device can be addressed using I2C if it has been previously activated by the signal I2C_EN_HDMI.
This signal can be toggled by setting a system controller register. Refer to Section 6.10 for details.
BoardReference Function
J1000 HDMI interface
Table 26: I2C_EN_FMC Controlled Functions
6.7

System Monitor/Current Sense

The Mars EB1 base board features a system monitor and current sense circuit, addressable via I2C - these
are used for voltage and current monitoring. Additional functionality, such as GPIO and fan control, is also
available.
Type Manufacturer
LM96080 Texas Instruments
Table 27: System Monitor Type
The system monitor performs two sets of voltage and current measurements. The user can select which
set of inputs should be measured by toggling the value of the VMON_SEL signal. This can be set via DIP
switches, or via the system controller registers. Please refer to Sections 6.3 and 6.10 for details.
Table 28 lists the voltage measurements performed by the system monitor.
D-0000-307-001
I2C Address
(7-bit) Comments
- Additional devices are available on the Mars
module
0x0D
0x2F
0x57
User-defined
I2C Address
User-defined
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