t

SPI

Data

Read

CSB

INTB

t

CMD:

Read 0x21

Rp Data

t

SPI

SPI: INTB Pin Mode Changed to DRDYB

CSB

INTB

Threshold High

Threshold Low

LDC1000

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SNOSCX2 – SEPTEMBER 2013

Wake-Up Mode

In Wake-Up mode, the INTB pin is asserted when proximity register value increases above Threshold High and

de-asserted when wake-up mode is disabled in INTB pin mode register.

This Mode can be used to wake-up an MCU which is asleep, to conserve power.

Figure 19. Behavior of INTB Pin in Wake-Up Mode

DRDYB Mode

In DRDY mode (default), the INTB pin is asserted every time the conversion data is available and de-asserted

once the read command on register 0x21 is registered internally; if the read is in progress, the pin is pulsed

instead.

Figure 20. Behavior of INTB Pin in DRDYB Mode

Copyright © 2013, Texas Instruments Incorporated

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