MPL3115A2

Sensors

Freescale Semiconductor, Inc.

21

7.1

Sensor Status

7.1.1

Status (0x00)

The aliases allow the STATUS register to be read easily before reading the current Pressure/Altitude or Temperature data,

delta Pressure/Altitude or Temperature data or FIFO data using register address auto-incrementing mechanism.

7.1.2

DR_STATUS (0x06)

The STATUS register provides the acquisition status information on a per sample basis, and reflects real-time updates to the

OUT_P and OUT_T registers. The same STATUS register can be read through an alternate address.

1.

The Registers in Area A from 0x00 to 0x05 depend on the F_MODE bit setting in FIFO Setup Register (F_SETUP).

F_MODE = 00, FIFO is disabled.

F_MODE = 01 is circular buffer.

F_MODE = 10 is full stop mode.

Register

Address

Name

Reset

Value

Reset

when

STANDBY

to ACTIVE

Type

Auto-Increment

Address

Comment

Registers: Area A (F_Mode = 0, FIFO disabled)

0x00/

0x06

Sensor Status Register (DR_STATUS)

0x00

Yes

R

0x01

DR_STATUS

0x01

Pressure Data Out MSB (OUT P_MSB)

0x00

Yes

R

0x02

0x01

Bits 12-19 of 20-bit

real-time Pressure

sample.

Root pointer to

Pressure and

Temperature

FIFO data.

0x02

Pressure Data Out CSB (OUT_P_CSB)

0x00

Yes

R

0x03

Bits 4-11 of 20-bit real-time Pressure

sample

0x03

Pressure Data Out LSB (OUT_P _LSB)

0x00

Yes

R

0x04

Bits 0-3 of 20-bit real-time Pressure

sample

0x04

Temperature Data Out MSB

(OUT_T_MSB)

0x00

Yes

R

0x05

Bits 4-11 of 12-bit real-time Temperature

sample

0x05

Temperature Data Out LSB

(OUT_T _LSB)

0x00

Yes

R

0x00

Bits 0-3 of 12-bit real-time Temperature

sample

Registers: Area A (F_Mode > 0, FIFO in circular buffer or full stop mode)

0x00/

0x0D

Sensor Status Register (F_STATUS)

0x00

Yes

R

0x01

F_STATUS

0x01

FIFO 8-bit Data Access (F_DATA)

0x00

Yes

R

0x01

0x01

0x02

Read to Reserved Area returns 00

0x00

N/A

—

0x03

—

0x03

Read to Reserved Area returns 00

0x00

N/A

—

0x04

—

0x04

Read to Reserved Area returns 00

0x00

N/A

—

0x05

—

0x05

Read to Reserved Area returns 00

0x00

N/A

—

0x00

—

Table 11. Alias for DR_Status (0x06) or F_Status (0x0D)

FIFO Data Enabled Mode Bit Setting

1.

The F_MODE is defined in Section 7.3.3

0x00 = DR_STATUS (0x06)

F_MODE > 00

0x00 = F_STATUS (0x0D)