ZSSC3122 datasheet(21/64 Pages) ETC2

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ZSSC3122

cLite™ Low Voltage Capacitive Sensor Signal Conditioner

Data Sheet

August 16, 2011

without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes

without notice.

21 of 63

Figure 3.1

General Operation

UPDATE MODE

2C, SPI, PDM, or Alarms)

SLEEP MODE

2C, SPI, or Alarms)

Command

Received

Command

Received

2C/SPI

only)

Command Mode

(No measurement cycle.

Full command set is available.)

Yes

Start_NOM

No, after Command Window expires (3ms / 10ms)

Command = Start_CM?

Measurement Request

Data Fetch

Command

Received.

Command =

Start_NOM?

Execute

Command

Update Rate Period

Over or Command

Received?

Update

Period

Over

Yes

Perform Measurement

Fetch Data

Normal Operation Mode

Perform initial measurement.

Start_CM

Command

Received

Power Down

(Wait for command)

Command =

2C DF or

SPI DF?

Fetch Data

Command =

2C MR or

SPI MR?

Yes

Power Down

(Wait for command.)

Yes

Perform Measurement

Yes

Command =

2C DF or

SPI DF?

Update Digital Output

Power-On Reset

Update Digital Output

Power Down

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