Datasheet SHT21

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Version 1.0 – January 2010

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9 Compatibility to SHT1x / 7x protocol

SHT2x sensors may be run by communicating with the

Sensirion specific communication protocol used for SHT1x

and SHT7x. In case such protocol is applied please refer

to the communication chapter of datasheet SHT1x or

SHT7x. Please note that reserved status bits of user

register must not be changed.

Please understand that with the SHT1x/7x communication

protocol only functions described in respective datasheets

can be used with the exception of the OTP reload function

that is not set to default on SHT2x. As an alternative to

OTP reload the soft reset may be used. Please note that

even if SHT1x/7x protocol is applied the timing values of

Table 5 and Table 7 as well as the calculation of physical

values in this SHT2x datasheet apply.