Datasheet

ADS1110
SBAS276A − MARCH 2003 − REVISED NOVEMBER 2003
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12
READING FROM THE ADS1110
To read the output register and the configuration register
from the ADS1110, address the ADS1110 for reading, then
read three bytes. The first two bytes will be the output
register’s contents, and the third will be the configuration
register’s contents.
It is not required to read the configuration register byte. It
is permissible to read fewer than three bytes during a read
operation.
Reading more than three bytes from the ADS1110 has no
effect. All bytes following the third will be FF
H
.
It is possible to ignore the ST/DRDY
bit and read data from
the ADS1110’s output register at any time, without regard
to whether a new conversion is complete. If the output
register is read more than once during a conversion cycle,
it will return the same data each time. New data will be
returned only when the output register has been updated.
A timing diagram of a typical ADS1110 read operation is
shown in Figure 2.
WRITING TO THE ADS1110
To write to the configuration register, address the ADS1110
for writing, and send one byte. The byte will be written to
the configuration register. Note that the output register
cannot be written to.
Writing more than one byte to the ADS1110 has no effect.
The ADS1110 will ignore any bytes sent to it after the first
one, and it will only acknowledge the first byte.
A timing diagram of a typical ADS1110 write operation is
shown in Figure 3.
Figure 2. Timing Diagram for Reading From the ADS1110
Figure 3. Timing Diagram for Writing To the ADS1110