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LIGHT_INT
3.4.13
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The DECA has a humidity and temperature sensor (HDC1000) that provides excellent measurement
accuracy at very low power. The HDC1000 sensor is placed at board edge and away from the heat
source of DECA so that user can make ambient temperature measurement without heat interference
from the heat source of DECA.
sensor to MAX 10 FPGA.
Figure 3-27 shows the connections between the MAX 10 FPGA and humidity and temperature sensor.
Table 3-18 Pin Assignment of Humidity and Temperature Sensor
Signal Name
RH_TEMP_I2C_SCL
RH_TEMP_I2C_SDA
RH_TEMP_DRDY_n
3.4.14
T
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The DECA provides a low-power, high-resolution digital temperature sensor (LM71) with an SPI
ans MICROWIRE compatible interface. The host can query the LM71 at any time to read
temperature. The LM71 has 13-bit plus sign temperature resolution (0.03125°C per LSB) while
operating over a temperature range of −40°C to +150°C. The LM71 temperature sensor is placed at
near the heat source of DECA so that user can easily make the board temperature measurement.
Figure 3-28
shows the connection of temperature sensor to MAX 10 FPGA.
DECA User Manual
PIN_AA9
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Figure 3-27
Table 3-18
lists the humidity and temperature sensor pin assignments.
FPGA Pin No. Description
PIN_Y10
I2C Clock for HDC1000 Sensor
PIN_AA10
I2C Data for HDC1000 Sensor
PIN_AB9
Data ready input from HDC1000 Sensor 3.3V
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S
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Interrupt input from Si1143 Sensor 3.3V
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shows the connection of humidity and temperature
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I/O Standard
3.3V
3.3V
Table 3-19
lists
www.terasic.com
May 22, 2015
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