Rainbow Electronics DS1629 - Manual (Page 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