Data Sheet

13

Revision 1.1, 2015-07-29

KP253

Digital Absolute Pressure Sensor

Functional Description

Figure 14 Acquire identifier command

Note: The Reset-bit (C12) determines how the diagnostic reset is handled. For details about the function of the

Reset-bit refer to Chapter 2.9.1.

The “trigger test mode” command is only for information. The test mode is only for calibration and E2PROM

programming. Both are already done during the supplier’s back-end assembly. The information should serve

to avoid command for unintentional test mode operation.

Note: Additional safeguards are provided to prevent unintentional test mode operation. For test mode

operation, the command must be the first command after power-up in combination with a high voltage

Figure 15 Trigger test mode command

2.7.1.5

Communication Error

In normal operation only the pressure, temperature, diagnosis and identifier commands are valid. Every

abnormality of these commands (e.g. unused command, other value of unused bits, number of clocks not

equal to 16n with n = 1, 2, 3...) will result in a communication error. The response to a detected communication

error is given below.

Figure 16 Response after a communication error

2.7.1.6

Identifier Response Definition

The response to an Acquire identifier command is a fixed value as stated below. With this response, the

KP253 sensor can be indentified when operated in a bus system with several different parts.

Figure 17 Identifier response definition

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