Datasheet
INA209
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......................................................................................................................................................... SBOS403B – JUNE 2007 – REVISED MARCH 2009
Status Register 01h (Read)
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
WOV WUV WP WS+ WS – OLOV OLUV OLP CRIT+ CRIT – CNVR SMBA OVF — — —
NAME
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
The Status Register flags activate whenever any limit is violated, and latch when corresponding latch bits are set.
These flags are cleared when the Status Register is read (unless a limit is exceeded, at which time the flag
immediately sets again).
After power-up and initial setup, the Status Register should be read once to clear any flags set as as a result of
power-up values prior to setup.
Bit Descriptions
WOV: Warning Bus Over-Voltage
Bit 15 This bit is set to '1' when the result in the Bus Voltage Register (04h) exceeds the level set in the Bus Over-Voltage
Warning Register (0Fh).
WUV: Warning Bus Under-Voltage
Bit 14 This bit is set to '1' when the result in the Bus Voltage Register (04h) is less than the value set in the Bus
Under-Voltage Warning Register (10h).
WP: Warning Power
Bit 13 This bit is set to '1' when the value of the Power Register (05h) exceeds the level set in the Power Warning
Register (0Eh).
WS+: Warning Shunt+ Voltage
Bit 12 This bit is set to '1' when the value of the Shunt Voltage Register (03h) exceeds the level set in the Shunt Voltage
Positive Warning Register (0Ch).
WS – : Warning Shunt – Voltage
Bit 11 This bit is set to '1' when the value of the Shunt Voltage Register (03h) is more negative than the level set in the
Shunt Voltage Negative Warning Register (0Dh).
OLOV: Over-Limit Bus Over-Voltage
Bit 10 This bit is set to '1' when the result in the Bus Voltage Register (04h) exceeds the level set in the Bus Over-Voltage
Over-Limit Register (12h).
OLUV: Over-Limit Bus Under-Voltage
Bit 9 This bit is set to '1' when the result in the Bus Voltage Register (04h) is less than the level set in the Bus
Under-Voltage Over-Limit Register (13h).
OLP: Over-Limit Power
Bit 8 This bit is set to '1' when the value of the Power Register (05h) exceeds the level set in the Power Over-Limit
Register (11h).
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