MPL3115A2

Sensors

28

Freescale Semiconductor, Inc.

7.7

Sensor Data

7.7.1

PT_DATA_CFG (0x13)

The PT_DATA_CFG register configures the Pressure data, Temperature data and event flag generator.

Table 36. INT_SOURCE Bit Descriptions

Name

Description

SRC_DRDY

Data ready interrupt status bit. Logic ‘1’ indicates that Pressure/Altitude or Temperature data ready interrupt is active

indicating the presence of new data and/or a data overwrite, otherwise it is a logic ‘0’.

This bit is asserted when the PTOW and/or PTDR is set and the functional block interrupt has been enabled.

This bit is cleared by reading the STATUS and Pressure/Temperature register.

SRC_FIFO

FIFO interrupt status bit. Logic ‘1’ indicates that a FIFO interrupt event such as an overflow event has occurred. Logic

‘0’ indicates that no FIFO interrupt event has occurred.

This bit is cleared by reading the F_STATUS register.

FIFO interrupt event generators: FIFO Overflow, or (Watermark: F_CNT = F_WMRK).

SRC_PW

Altitude/Pressure alerter status bit near or equal to target Pressure/Altitude (near is within target value ± window value).

Window value needs to be non zero for interrupt to trigger.

SRC_TW

Temperature alerter status bit near or equal to target temperature (near is within target value ± window value.) Window

value needs to be non zero for interrupt to trigger.

SRC_PTH

Altitude/Pressure threshold interrupt. With the window set to a non zero value, the trigger will occur on crossing any of

the thresholds: upper, center or lower. If the window is set to 0, it will only trigger on crossing the center threshold.

SRC_TTH

Temperature threshold interrupt. With the window set to a non zero value, the trigger will occur on crossing any of the

thresholds: upper, center or lower. If the window is set to 0, it will only trigger on crossing the center threshold.

SRC_PCHG

Delta P interrupt status bit.

SRC_TCHG

Delta T interrupt status bit

Table 37. PT_DATA_CFG Register

7

6

5

43

210

R0

0

0

0

0

DREM

PDEFE

TDEFE

W

Reset

0

0

0

00

000

Table 38. PT_DATA_CFG Bit Descriptions

Name

Description

DREM

Data ready event mode. If the DREM bit is set logic ‘1’ and one or more of the data ready event flags (PDEFE, TDEFE) are

enabled, then an event flag will be raised upon change in state of the data. If the DREM bit is cleared logic ‘0’ and one or

more of the data ready event flags are enabled, then an event flag will be raised whenever the system acquires a new set

of data.

Default value: 0.

0: Event detection disabled

1: Generate data ready event flag on new Pressure/Altitude or Temperature data

PDEFE

Data event flag enable on new Pressure/Altitude data.

Default value: 0

0: Event detection disabled

1: Raise event flag on new Pressure/Altitude data

TDEFE

Data event flag enable on new Temperature data. Default value: 0

0: Event detection disabled

1: Raise event flag on new Temperature data