Datasheet
WARNING WATCHDOG REGISTERS
Shunt Voltage Positive Warning Register 0Ch (Read/Write)
Shunt Voltage Negative Warning Register 0Dh (Read/Write)
Power Warning Register 0Eh (Read/Write)
Bus Over-Voltage Warning Register 0Fh (Read/Write)
INA209
SBOS403B – JUNE 2007 – REVISED MARCH 2009 .........................................................................................................................................................
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These registers set warning limits that trigger flags in the Status Register and activate the Warning pin. Note:
Delayed output is set in the Critical DAC – Register (15h).
At full-scale range = ± 320mV, 15-bit + sign, LSB = 10 µ V (decimal = 32000, positive value hex = 7D00, negative
value hex = 8300).
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT SWP
SWP14 SWP13 SWP12 SWP11 SWP10 SWP9 SWP8 SWP7 SWP6 SWP5 SWP4 SWP3 SWP SWP1 SWP0
NAME SIGN
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
Bit Descriptions
SWP: Sets the shunt voltage positive warning limit.
Bits 15 – 0 If the value of the Shunt Voltage Register (03h) exceeds this limit, the WS+ bit of the Status Register (01h) is set to
'1' and the Warning pin asserts if the WRNEN bit is set.
At full-scale range = ± 320mV (decimal = 32000, positive value hex = 7D00, negative value hex = 8300),
15 bit + sign, LSB = 10 µ V.
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT SWN
SWN14 SWN13 SWN12 SWN11 SWN10 SWN9 SWN8 SWN7 SWN6 SWN5 SWN4 SWN3 SWN2 SWN1 SWN0
NAME SIGN
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
Bit Descriptions
SWN: Sets the shunt voltage negative warning limit.
Bits 15 – 0 If the value of the Shunt Voltage Register (03h) is below this limit, the WS – bit of the Status Register (01h) is set to
'1' and the Warning pin asserts if the WRNEN bit is set.
At full-scale range, same as the Power Register.
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
PW15 PW14 PW13 PW12 PW11 PW10 PW9 PW8 PW7 PW6 PW5 PW4 PW3 PW2 PW1 PW0
NAME
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
Bit Descriptions
PW: Sets the power warning limit.
Bits 15 – 0 If the value of the Power Register (05h) exceeds this limit, the WP bit of the Status Register (01h) is set to '1' and
the Warning pin asserts if the WRNEN bit is set.
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
BWO12 BWO11 BWO10 BWO9 BWO8 BWO7 BWO6 BWO5 BWO4 BWO3 BWO2 BWO1 BWO0 — WPL WNL
NAME
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
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