Datasheet KP276A1201 (Infineon) - 10

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CONFIDENTIAL KP276A1201 Digital Absolute Pressure Sensor Functional description 1.6.2.2 Status and communication nibble
This nibble is reserved to enable the sensor to transmit different information such as part numbers or error code information. The nibble is defined in the following table:
Table 4 Status nibble description Status Nibble Bit Function
0 Fast channel-1 error flag 1 Fast channel-2 error flag 2 Serial message bit: Serial message data bit 3 Serial message bit: Serial message data bit and indicates the start of a serial message The serial message channel (slow message channel) is implemented as enhanced serial message format.
1.6.2.3 Enhanced serial message format
Bit #2 and #3 of the status and communication nibble are used for serial data transmission. A serial message stretches over 18 consecutive SENT data messages. All 18 messages must be successfully received for the serial value to be valid. The frame start of a serial message is indicated by the unique pattern “1111110” in bit #3 of the status and communication nibble,
Figure 10
. The first “1” in a series of six “1” (after a “0”) indicates the first nibble of a serial message. Serial data bit #3 of serial communication nibble 1 - nibble 6 are set to “1”, Serial data bit #3 of serial communication nibbles 7, 13 and 18 are set to “0”. The serial message contains 20 bits of payload data. The communication is defined by the configuration bit (serial data bit #3, serial communication nibble No. 8), configuration bit = 0”: • 12-bit data and 8-bit message ID ... SENT Message 1 SENT Message 2 SENT Message 3 Pause Data 1 Data 2 Pulse Sync Status CRC Sync Status Sync Status Sync ...Status Status & Comm. Nibble Bit 3 2 1 0 Serial Communication Reserved 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Nibble Receive No. Serial Data (bit #3) 1 1 1 1 1 1 0 C 8-bit ID (7-4) 0 8-bit ID (3-0) 0 Serial Data (bit #2) 6-bit CRC 12-bit data field
Figure 9 Construction of enhanced serial data message from 18 SENT messages
All data (data field, message ID and CRC) that is transmitted in the serial message channel is sent in the order MSB to LSB. Datasheet 10 Revision 1.0 2019-01-25 Document Outline dTurboTMAP with SENT Output and Temperature Sensor Interface Features Potential applications Product validation Description Table of contents 1 Functional description 1.1 Pin configuration 1.2 Pin description 1.3 Block Diagram 1.4 Transfer function pressure 1.4.1 Pressure transfer function characteristics 1.4.2 Pressure accuracy 1.5 Transfer function temperature 1.5.1 Temperature transfer function characteristics 1.6 SENT interface 1.6.1 Physical layer 1.6.2 Data link layer 1.6.2.1 Nibble specification 1.6.2.2 Status and communication nibble 1.6.2.3 Enhanced serial message format 1.6.2.4 Enhanced serial message data 1.6.3 Pressure channel output codes 1.6.4 Temperature channel output codes 1.6.5 Diagnostic Error Codes 1.6.5.1 Signal out of range 1.6.5.2 Diag1 1.6.5.3 Diag2 1.6.5.4 EEPROM Check 1.6.6 Definition of Pressure signal path latency 1.7 External temperature sensor 1.7.1 Linearization of the external temperature sensor transfer function 1.7.2 Accuracy for NTC signal processing 2 Specification 2.1 Application circuit example 2.2 Application circuit example for EMC 2.3 Absolute maximum ratings 2.4 Operating range 2.5 Characteristics 3 Package information 3.1 PG-DSOF-8-162 Outline 3.2 Identification code Revision history Disclaimer