Datasheet

ADS1258-EP
SBAS445D –MARCH 2009– REVISED MARCH 2011 www.ti.com
Bit 3 CLKENB
This bit enables the clock output on pin CLKIO. The clock output originates from the device crystal
oscillator and PLL circuit.
0 = Clock output on CLKIO disabled.
1 = Clock output on CLKIO enabled (default).
Note: If the CLKSEL pin is set to '1', the CLKIO pin is a clock input only. In this case, setting this bit
has no effect.
Bit 2 CHOP
This bit enables the chopping feature on the external multiplexer loop.
0 = Chopping Disabled (default)
1 = Chopping Enabled
The chopping feature corrects for offset originating from components used in the external multiplexer
loop; see the External Chopping section.
Note that for Internal System readings (Temperature, VCC, Gain, and Reference), the CHOP bit must
be 0.
Bit 1 STAT Status Byte Enable
When reading channel data from the ADS1258, a status byte is normally included with the conversion
data. However, in some ADS1258 operating modes, the status byte can be disabled. Table 13, Status
Byte, shows the modes of operation and the data read formats in which the status byte can be
disabled.
0 = Status Byte Disabled
1 = Status Byte Enabled (default)
Table 13. Status Byte
CHANNEL DATA CHANNEL DATA
MODE READ COMMAND READ DIRECT
Auto-Scan Always Enabled Enabled/Disabled by STAT Bit
Fixed-Channel Always Enabled (Byte is Undefined) Always Disabled
Bit 0 Must be 0
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