Rainbow-electronics DS1629 Manual de usuario descargar pdf (Pagina 19)

DS1629

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Sample Command Sequence Table 10

Example: Assuming the DS1629 is configured such that the clock is running and the thermometer is

converting, read the current time and temperature. Also read the status of the alarm flags.

BUS MASTER

MODE

DS1629

MODE

DATA (MSB

FIRST) COMMENTS

TX RX START Bus Master initiates a START condition

TX RX 9Eh

Bus Master sends DS1629 address; R/ W = 0

RX TX ACK DS1629 generates acknowledge bit

TX RX AAh Bus Master sends read temperature protocol

RX TX ACK DS1629 generates acknowledge bit

TX RX START Bus Master initiates a Repeated START condition

TX RX 9Fh

Bus Master sends DS1629 address; R/ W = 1

RX TX ACK DS1629 generates acknowledge bit

RX TX <data byte> DS1629 generates MSB of temperature

TX RX ACK Bus Master generates acknowledge bit

RX TX <data byte> DS1629 generates LSB of temperature

TX RX NACK Master generates no-acknowledge bit

TX RX START Bus Master initiates a repeated START condition

TX RX 9Eh

Bus Master sends DS1629 address; R/ W = 0

RX TX ACK DS1629 generates acknowledge bit

TX RX C0h Bus Master sends access clock protocol

RX TX ACK DS1629 generates acknowledge bit

TX RX 01h Bus Master set clock register address to “minutes”

RX TX ACK DS1629 generates acknowledge bit

TX RX START Bus Master initiates a Repeated START condition

TX RX 9Fh

Bus Master sends DS1629 address; R/ W = 1

RX TX ACK DS1629 generates acknowledge bit

RX TX <data byte> DS1629 generates minutes

TX RX ACK Bus Mastergenerates acknowledge bit

RX TX <data byte> DS1629 generates hours and clock mode

TX RX ACK Bus Master generates acknowledge bit

• • • •

RX TX <data byte> DS1629 generates year

TX RX NACK Master generates no-acknowledge bit

TX RX START Bus Master initiates a repeated START condition

TX RX 9Eh

Bus Master sends DS1629 address; R/ W = 0

RX TX ACK DS1629 generates acknowledge bit

TX RX ACh Bus Master sends access configuration protocol

RX TX ACK DS1629 generates acknowledge bit

TX RX 9Fh

Bus Master sends DS1629 address; R/ W = 1

RX TX ACK DS1629 generates acknowledge bit

RX TX <data byte> DS1629 generates MSB of configuration register

TX RX ACK Master generates acknowledge bit

RX TX <data byte> DS1629 generates LSB of configuration register

(flags)

TX RX NACK Master generates no-acknowledge bit

TX RX STOP Bus Master initiates STOP condition

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Rainbow-electronics DS1629 Manual de usuario Pagina 19

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