HTU21D
Peripheral Module
SENSOR SOLUTIONS /// HTU21D PERIPHERAL MODULE
Detailed Description
I
2
C Interface
The peripheral module can interface to the host in one of two ways. It can plug directly into a Pmod-compatible port (configured for I
2
C)
through connector J1, or to other I
2
C boards that have a Pmod configured expansion connector.
I
2
C Interface (Daisy Chaining Modules)
Connector J1 provides connection of the module to the Pmod host. The pin assignments and functions adhere to the Pmod standard as
shown in Table 1. The J2 connector allows additional Pmod modules to be connected in a daisy-chain fashion. See Table 2.
External Control Signals
The IC operates as an I
2
C slave using the standard 2 wire I
2
C connection scheme. The IC is controlled by the host (through the Pmod
connector). In cases where one or more of the SCL and SDA signals are driven from an external source, resistors R1, R2 provide pull-up.
However, this also increases the apparent load to the external driving source. If the external source is incapable of driving these loads, they
should be removed from the PC board.
Reference Material
Detailed information regarding operation of the IC:
HTU21D Datasheet
Detailed information regarding the MicroZed Driver:
HTU21D MicroZed Driver
Complete software sensor evaluation kit for MicroZed:
HTU21D MicroZed Software
Detailed information regarding the ZedBoard Driver:
HTU21D ZedBoard Driver
Complete software sensor evaluation kit for ZedBoard:
HTU21D ZedBoard Software
Ordering Information
Contact us:
Measurement Specialties Inc – MEAS France
Impasse Jeanne Benozzi CS 83 163
31027 Toulouse Cedex 3, FRANCE
Tel:+33 (0)5 820.822.02 Fax:+33 (0)5.820.821.51
Sales: sales.tlse.fr@meas-spec.com
MEAS Website: http://www.meas-spec.com/DCS_TBD
te.com/sensorsolutions
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05/15 Original
