Texas Instruments ADS869 Series Manual page 60

ADS8694, ADS8698
SBAS686 – JULY 2015
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LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Bit Field
7-0 Channel n Hysteresis[7-0]
(n = 0 to 7 for the ADS8698;
n = 0 to 3 for the ADS8694)
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LEGEND: R/W = Read/Write; -n = value after reset
Table 22. Channel n High Threshold MSB Register Field Descriptions
Bit Field
7-0 CHn_HT[15:8]
(n = 0 to 7 for the ADS8698;
n = 0 to 3 for the ADS8694)
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Figure 102. Ch n Hysteresis Registers
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Table 21. Channel n Hysteresis Register Field Descriptions
(n = 0 to 7 for the ADS8698; n = 0 to 3 for the ADS8694)
Type
R/W
Figure 103. Ch n High Threshold MSB Registers
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(n = 0 to 7 for the ADS8698; n = 0 to 3 for the ADS8694)
Type
R/W
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CHn_HYST[7:0]
R/W-0h
Reset Description
0h These bits set the channel high and low alarm hysteresis for
channel n (n = 0 to 7 for the ADS8698; n = 0 to 3 for the
ADS8694)
For example, bits 7-0 of the channel 0 register (address 15h) set
the channel 0 alarm hysteresis.
00000000 = No hysteresis
00000001 = ±1-LSB hysteresis
00000010 to 11111110 = ±2-LSB to ±254-LSB hysteresis
11111111 = ±255-LSB hysteresis
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CHn_HT[15:8]
R/W-1h
Reset Description
1h These bits set the MSB byte for the 16-bit channel n high alarm.
For example, bits 7-0 of the channel 0 register (address 16h) set
the MSB byte for the channel 0 high alarm threshold. The
channel 0 high alarm threshold is AAFFh when bits 7-0 of the ch
0 high threshold MSB register (address 16h) are set to AAh and
bits 7-0 of the ch 0 high threshold LSB register (address 17h)
are set to FFh.
0000 0000 = MSB byte is 00h
0000 0001 = MSB byte is 01h
0000 0010 to 1110 1111 = MSB byte is 02h to FEh
1111 1111 = MSB byte is FFh
ADS8694 ADS8698
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