ADS7950-Q1 Datasheet, PDF (38/52 Pages) Texas Instruments – ADS79xx-Q1 8-, 10-, and 12-Bit, 1-MSPS, 4-, 8-, 12-, and 16-Channel, Single-Ended, Micropower, Serial Interface, Analog-to-Digital Converters

ADS7950-Q1, ADS7951-Q1, ADS7952-Q1, ADS7953-Q1, ADS7954-Q1
ADS7956-Q1, ADS7957-Q1, ADS7958-Q1, ADS7959-Q1, ADS7960-Q1, ADS7961-Q1
SBAS652A – MAY 2014 – REVISED AUGUST 2014
www.ti.com
Each alarm group requires nine CS frames for programming the respective alarm thresholds. In the first frame
the device enters the programming sequence and in each subsequent frame the device programs one of the
registers from the group. The device offers a feature to program less than eight registers in one programming
sequence. The device exits the alarm threshold programming sequence in the next frame after encountering the
first exit alarm program bit high.
CS
Device in any operation
mode
No
Program alarm
thresholds?
Yes
CS
Entry into alarm-
register
programming
sequence
CS
Alarm-register
programming
sequence
SDI:
DI15 to DI12 = 11xx
(see note A.)
Device enters alarm
register programming
sequence
SDI: DI15 to 0
(see note B.)
DI12 = 1?
No
Yes
Yes
Program
another group
of four channels?
No
End of alarm
programing
A. xx indicates a group of four channels (see Table 12).
B. Per Table 12.
C. The device continues operation in the selected mode during programming. The SDO pin is valid, however changing the range or writing
the GPIO data into the device during programming is not possible.
Figure 57. Alarm Program Register Programming Flowchart
38
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Product Folder Links: ADS7950-Q1 ADS7951-Q1 ADS7952-Q1 ADS7953-Q1 ADS7954-Q1 ADS7956-Q1 ADS7957-
Q1 ADS7958-Q1 ADS7959-Q1 ADS7960-Q1 ADS7961-Q1