23/04/2019
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Version 1.09
2.9.8
System Monitor
An I
2
C system monitor (U1100) at address 0x2F is available on the Mars PM3 I
2
C bus to monitor the
supply voltages (1V2, 3V3, VCC_IO, 5V and 12V), read the FAN RPM’s and control
two user GPIOs. It
can be accessed by the FPGA and the Cypress FX3 USB 3.0 controller. For more details refer to the
LM96080 datasheet
5
.
Type
Manufacturer
LM96080
National
Table 23: I
2
C System Monitor Type
Pin
Signal
Direction Description
21
IN0
IN
0.1754 * VCC_12V
20
IN1
IN
0.3125 * VCC_5V
19
IN2
IN
0.6875 * VCC_3V3
18
IN3
IN
0.6875 * VCC_IO
17
IN4
IN
1.0 * VCC_1V2
16
IN5
IN
1.0 * VMON_P41
15
IN6
IN
1.0 * VCC_OUT
6
BTI
Not connected
7
GPI
IN
SYSMON_GPI
1
INT_IN#
IN
LOADSW_FLG# (0: USB 2.0 host and HDMI power failure, 1: Ok)
4
FAN1
IN
SYSMON_TACHO
5
FAN2
IN
Not connected
10
INT#
IN
I2C_INT#
11
GPO#
OUT
SYSMON_GPO#
12
RESET_IN#
IN
PWR_GOOD
Table 24: I
2
C System monitor pin assignment
2.9.9
Cypress FX3 USB 3.0 Controller
The Mars PM3 board features a USB 3.0 controller from Cypress, which allows data transfers to the
host computer beyond 300 MB/s. The USB controller is connected to the FPGA module using a slave
FIFO interface that can be configured for 16 or 32 Bit mode at an interface clock of 100 MHz. The USB