Rainbow-electronics DS1629 Uživatelský manuál stáhnout pdf (Strana 18)

DS1629

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Sample Command Sequence Table 9

Example: The bus master configures the DS1629 in the power-up one-shot mode. It sets the ALRM

output active low with only the thermometer generating an ALRM and disables the oscillator output. It

then sets the clock to 11:30AM on Thursday, January 1, 1998. It sets the thermostat with TH=50°C.

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 ACh Bus Master sends access configuration protocol

RX TX ACK DS1629 generates acknowledge bit

TX RX 11h Write to configuration as specified

RX TX ACK DS1629 generates 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 00h Bus Master sends starting clock register address

RX TX ACK DS1629 generates acknowledge bit

TX RX 00h Bus Master sets seconds and enables the clock

RX TX ACK DS1629 generates acknowledge bit

TX RX 30h Bus Master sets clock minutes

RX TX ACK DS1629 generates acknowledge bit

TX RX 51h Bus Master sets clock hours and AM/PM clock mode

RX TX ACK DS1629 generates acknowledge bit

TX RX 05h Bus Master sets day to Thursday

RX TX ACK DS1629 generates acknowledge bit

TX RX 01h Bus Master sets date to the first of the month

RX TX ACK DS1629 generates acknowledge bit

TX RX 01h Bus Master sets month to January

RX TX ACK DS1629 generates acknowledge bit

TX RX 98h Bus Master sets year to ‘98

RX TX ACK DS1629 generates 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 A1h Bus Master sends access TH protocol

RX TX ACK DS1629 generates acknowledge bit

TX RX 32h Bus Master writes MSB of TH (50°C)

RX TX ACK DS1629 generates acknowledge bit

TX RX 00h Bus Master writes LSB of TH (50°C)

RX TX ACK DS1629 generates acknowledge bit

TX RX STOP Bus Master initiates STOP condition

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