Table 7-16. DIAG_ALRT Register Field Descriptions (continued)

Bit

Field

Type

Reset

Description

4

BUSOL

R/W

0h

This bit is set to 1 if the bus voltage measurement exceeds the

threshold limit in the bus over-limit register.

0h = Normal

1h = Bus Over-Limit Event

When ALATCH =1 this bit is cleared by reading the register.

3

BUSUL

R/W

0h

This bit is set to 1 if the bus voltage measurement falls below the

threshold limit in the bus under-limit register.

0h = Normal

1h = Bus Under-Limit Event

When ALATCH =1 this bit is cleared by reading the register.

2

POL

R/W

0h

This bit is set to 1 if the power measurement exceeds the threshold

limit in the power limit register.

0h = Normal

1h = Power Over-Limit Event

When ALATCH =1 this bit is cleared by reading the register.

1

CNVRF

R/W

0h

This bit is set to 1 if the conversion is completed.

0h = Normal

1h = Conversion is complete

When ALATCH =1 this bit is cleared by reading the register or

starting a new triggered conversion.

0

MEMSTAT

R/W

1h

This bit is set to 0 if a checksum error is detected in the device trim

memory space.

0h = Memory Checksum Error

1h = Normal Operation

7.6.1.13 Shunt Overvoltage Threshold (SOVL) Register (Address = Ch) [reset = 7FFFh]

If negative values are entered in this register, then a shunt voltage measurement of 0 V will trip this alarm. When

using negative values for the shunt under and overvoltage thresholds be aware that the over voltage threshold

must be set to the larger (that is, less negative) of the two values. The SOVL register is shown in Table 7-17.

Return to the Summary Table.

Table 7-17. SOVL Register Field Descriptions

Bit

Field

Type

Reset

Description

15-0

SOVL

R/W

7FFFh

Sets the threshold for comparison of the value to detect Shunt

Overvoltage (overcurrent protection). Two's complement value.

Conversion Factor: 5 µV/LSB when ADCRANGE = 0

1.25 µV/LSB when ADCRANGE = 1.

7.6.1.14 Shunt Undervoltage Threshold (SUVL) Register (Address = Dh) [reset = 8000h]

The SUVL register is shown in Table 7-18.

Return to the Summary Table.

Table 7-18. SUVL Register Field Descriptions

Bit

Field

Type

Reset

Description

15-0

SUVL

R/W

8000h

Sets the threshold for comparison of the value to detect Shunt

Undervoltage (undercurrent protection). Two's complement value.

Conversion Factor: 5 µV/LSB when ADCRANGE = 0

1.25 µV/LSB when ADCRANGE = 1.

INA229

SLYS023 – DECEMBER 2020

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