LMP92018

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SNAS514B – NOVEMBER 2011 – REVISED MAY 2013

ADC INPUT MUX SELECT DATA READ COMMAND

The selection of the analog input, and the read-back of the ADC conversion result are completed by the SPI

transaction shown in the following table. The ADC block is described in ANALOG SENSE SUBSYSTEM.

FRAME 1: DIN

FRAME 2: DOUT

Command

Payload

Command

Payload

Bit

→

23

22:19

18:16

15:12

11:2

1:0

23

22:19

18:16

15:12

11:2

1:0

READ

1

1100

ADR

x

x

x

1

1100

ADR

0000

ADATA

00

x

Don't Care

ADC Input Address:

000: IN0

001: IN1

010: IN2

ADR

011: IN3

100: IN4

101: IN5

110: IN6

111: IN7

ADATA

ADC output Data. ADATA is a 10–bit unsigned integer.

TEMPERATURE SENSOR OUTPUT REGISTER

The contents of the internal temperature sensor output register can be tested by the SPI transaction shown in the

following table. The internal temperature sensor is described in DIGITAL TEMPERATURE SENSOR.

FRAME 1: DIN

FRAME 2: DOUT

Command

Payload

Command

Payload

Bit

→

23

22:16

15:12

11:0

23

22:16

15:12

11:0

READ

1

1110000

x

x

1

1110000

0000

TDATA

x

Don't Care

TDATA

Temperature Sensor Output Data. TDATA is a 12–bit signed integer.

NOOP — No Operation

NOOP offers no functionality of its own. It is provided as the means of completing the pending READ operation

i.e. “pushing out” the data requested in the previous transaction.

FRAME 1: DIN

FRAME 2: DOUT

Command

Payload

Command

Payload

Bit

→

23:16

15:0

23:16

15:0

NOOP

00000000

x

00000000

16'b0

x

Don't Care

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