AD7150_17 datasheet(23/29 Pages) AD

Teilenummer	AD7150

Bauteilbeschribung	Converter for Proximity Sensing

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Hersteller	AD [Analog Devices]

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AD7150

Rev. 0 | Page 22 of 28

If a repeated start condition is encountered after the address

pointer byte, all peripherals connected to the bus respond

exactly as outlined previously for a start condition; that is, a

repeated start condition is treated the same as a start condition.

When a master device issues a stop condition, it relinquishes

control of the bus, allowing another master device to take

control of the bus. Therefore, a master wanting to retain control

of the bus issues successive start conditions known as repeated

start conditions.

AD7150 RESET

To reset the AD7150 without having to reset the entire serial

bus, an explicit reset command is provided. This uses a particular

address pointer word as a command word to reset the part and

upload all default settings. The AD7150 does not respond to the

serial bus commands (do not acknowledge) during the default

values upload for approximately 2 ms.

The reset command address word is 0xBF.

GENERAL CALL

When a master issues a slave address consisting of seven 0s with

the eighth bit (R/W bit) set to 0, this is known as the general call

address. The general call address is for addressing every device

connected to the serial bus. The AD7150 acknowledges this

address and reads in the following data byte.

If the second byte is 0x06, the AD7150 is reset, completely

uploading all default values. The AD7150 does not respond to

the serial bus commands (do not acknowledge) during the

default values upload for approximately 2 ms.

The AD7150 does not acknowledge any other general call

commands.

1–7

8

9

1–7

8

9

1–7

8

9

P

S

START ADDR R/W ACK SUBADDRESS ACK

DATA

ACK

STOP

SDATA

SCLOCK

Figure 42. Bus Data Transfer

DATA

A(S)

S SLAVE ADDR A(S)

SUB ADDR

A(S)

LSB = 0

LSB = 1

DATA

P

S SLAVE ADDR A(S)

SUB ADDR A(S) S SLAVE ADDR

A(S)

DATA

A(M)

DATA

P

WRITE

SEQUENCE

READ

SEQUENCE

A(S) = NO ACKNOWLEDGE BY SLAVE

A(M) = NO ACKNOWLEDGE BY MASTER

A(S) = ACKNOWLEDGE BY SLAVE

A(M) = ACKNOWLEDGE BY MASTER

S = START BIT

P = STOP BIT

A(S)

A(M)

Figure 43. Write and Read Sequences

Ähnliche Beschreibung - AD7150_17

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Texas Instruments	FDC2212	1Mb / 60P	[Old version datasheet] Capacitance-to-Digital Converter for Proximity Level Sensing Applications
NVE Corporation	AA002	378Kb / 2P	Proximity Sensing
ams AG	TSL27721	848Kb / 56P	Light-to-Digital Converter with Proximity Sensing
ams AG	TSL27711	780Kb / 50P	Light-to-Digital Converter with Proximity Sensing
Analog Devices	AD7150	986Kb / 28P	Ultra-Low Power, 2-Channel, Capacitance Converter for Proximity Sensing REV. 0
	AD7151	518Kb / 28P	Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing REV. 0
	AD7150	986Kb / 28P	Ultra-Low Power, 2-Channel, Capacitance Converter for Proximity Sensing REV. 0
ams AG	TSL2771	780Kb / 33P	LIGHT-TO-DIGITAL CONVERTER with PROXIMITY SENSING
Analog Devices	AD7151	1,022Kb / 28P	Ultra-Low Power, 1-Channel, Capacitance Converter for Proximity Sensing REV. 0
ams AG	TSL2772	1Mb / 35P	LIGHT-TO-DIGITAL CONVERTER with PROXIMITY SENSING

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