Texas Instruments ADS869 Series Manual page 57

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8.5.2.3.4.2 Alarm Flag Registers: Tripped and Active (address = 11h to 14h)
There are two alarm thresholds (high and low) per channel, with two flags for each threshold. An active alarm
flag is enabled when an alarm is triggered (when data cross the alarm threshold) and remains enabled as long
as the alarm condition persists. A tripped alarm flag is enabled in the same manner as an active alarm flag, but
remains latched until read. Registers 11h to 14h in the program registers store the active and tripped alarm flags
for all individual eight channels.
Figure 98. ALARM Ch0-3 Tripped-Flag Register (address = 11h)
7 6
Tripped Alarm Tripped Alarm
Flag Ch0 Low Flag Ch0 High
R-0h R-0h
LEGEND: R = Read only; -n = value after reset
Table 17. ALARM Ch0-3 Tripped-Flag Register Field Descriptions
Bit Field
7-0 Tripped Alarm Flag Ch n
Low or High (n = 0 to 3)
Figure 99. ALARM Ch0-3 Active-Flag Register (address = 12h)
7 6
Active Alarm Active Alarm
Flag Ch0 Low Flag Ch0 High
R-0h R-0h
LEGEND: R = Read only; -n = value after reset
Table 18. ALARM Ch0-3 Active-Flag Register Field Descriptions
Bit Field
7-0 Active Alarm Flag Ch n Low
or High (n = 0 to 3)
Figure 100. ALARM Ch4-7 Tripped-Flag Register (address = 13h)
7 6
Tripped Alarm Tripped Alarm
Flag Ch4 Low Flag Ch4 High
R-0h R-0h
LEGEND: R = Read only; -n = value after reset
(1) This register is not included in the 4-channel version of the device. A write operation on this register has no effect on device behavior. A
read operation on this register outputs all 1's on the SDO line.
Table 19. ALARM Ch4-7 Tripped-Flag Register Field Descriptions
Bit Field
7-0 Tripped Alarm Flag Ch n
Low or High (n = 4 to 7)
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5 4
Tripped Alarm Tripped Alarm
Flag Ch1 Low Flag Ch1 High
R-0h R-0h
Type Reset
R 0h
5 4
Active Alarm Active Alarm
Flag Ch1 Low Flag Ch1 High
R-0h R-0h
Type Reset
R 0h
5 4
Tripped Alarm Tripped Alarm
Flag Ch5 Low Flag Ch5 High
R-0h R-0h
Type Reset
R 0h
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3 2
Tripped Alarm Tripped Alarm
Flag Ch2 Low Flag Ch2 High
R-0h R-0h
Description
Tripped alarm flag high, low for channel n (n = 0 to 3)
Each individual bit indicates an active high or low alarm flag status for
each channel, as per the alarm flags register for channels 0 to 7.
0 = No alarm detected
1 = Alarm detected
3 2
Active Alarm Active Alarm
Flag Ch2 Low Flag Ch2 High
R-0h R-0h
Description
Active alarm flag high, low for channel n (n = 0 to 3)
Each individual bit indicates an active high or low alarm flag status for
each channel, as per the alarm flags register for channels 0 to 7.
0 = No alarm detected
1 = Alarm detected
3 2
Tripped Alarm Tripped Alarm
Flag Ch6 Low Flag Ch6 High
R-0h R-0h
Description
Tripped alarm flag high, low for channel n (n = 4 to 7).
Each individual bit indicates an active high or low alarm flag status for
each channel, as per the alarm flags register for channels 0 to 7.
0 = No alarm detected
1 = Alarm detected
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ADS8694 ADS8698
ADS8694, ADS8698
SBAS686 – JULY 2015
1 0
Tripped Alarm Tripped Alarm
Flag Ch3 Low Flag Ch3 High
R-0h R-0h
1 0
Active Alarm Active Alarm
Flag Ch3 Low Flag Ch3 High
R-0h R-0h
(1)
1 0
Tripped Alarm Tripped Alarm
Flag Ch7 Low Flag Ch7 High
R-0h R-0h
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