Terasic MTLC, User Manual

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MTLC User Manual
17
www.terasic.com
May 22, 2014
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The MTLC is equipped with a digital accelerometer sensor module. The ADXL345 is a small,
thin, ultralow power assumption 3-axis accelerometer with high resolution measurement.
Digitalized output is formatted as 16-bit twos complement and can be accessed either using
SPI interface or I2C interface. This chip uses the 3.3V CMOS signaling standard. Main
applications include medical instrumentation, industrial instrumentation, personal electronic
aid and hard disk drive protection etc. Some of the key features of this device are listed below.
For more detailed information of better using this chip, please refer to its datasheet which is
available on manufacturer’s website or under the /datasheet folder of the system CD.
Table 3-4 Pin Names and Descriptions of the GSENSOR Module
Signal Name FPGA Pin No. Description I/O Standard
GSENSOR_INT1 G27 Interrupt 1 output 2.5V
GSENSOR_INT2 G28 Interrupt 2 output 2.5V
GSENSOR_CS_n F28 Chip Select 2.5V
GSENSOR_ALT_ADDR K27 I2C Address Select 2.5V
GSENSOR_SDA_SDI_SDI
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K28
Serial Data
2.5V
GSENSOR_SCL_SCLK M27 Serial Communications Clock 2.5V
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The APDS-9300 is a low-voltage digital ambient light sensor that converts light intensity to
digital signal output capable of direct I2C communication. Each device consists of one
broadband photodiode (visible plus infrared) and one infrared photodiode. Two integrating
ADCs convert the photodiode currents to a digital output that represents the irradiance
measured on each channel. This digital output can be input to a microprocessor where
illuminance (ambient light level) in lux is derived using an empirical formula to approximate
the human-eye response. For more detailed information of better using this chip, please refer to
its datasheet which is available on manufacturer’s website or under the /datasheet folder of the
system CD.
Table 3-5 Pin names and Descriptions of Ambient Light Sensor Module
Signal Name FPGA Pin No. Description I/O Standard
LSENSOR_ADDR_SEL J25 Chip select 2.5V
LSENSOR_INT L28 Interrupt output 2.5V
LSENSOR_SCL J26 Serial Communications Clock 2.5V
LSENSOR_SDA L27 Serial Data 2.5V