Datasheet
OVER-LIMIT/CRITICAL WATCHDOG REGISTERS
Power Over-Limit Register 11h (Read/Write)
Bus Over-Voltage Over-Limit Register 12h (Read/Write)
Bus Under-Voltage Over-Limit Register 13h (Read/Write)
INA209
SBOS403B – JUNE 2007 – REVISED MARCH 2009 .........................................................................................................................................................
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These registers set the over-limit and critical DAC limits that trigger flags to be set in the Status Register and
activate the Overlimit pin or the Critical pin.
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
PO15 PO14 PO13 PO12 PO11 PO10 PO9 PO8 PO7 PO6 PO5 PO4 PO3 PO2 PO1 PO0
NAME
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
Bit Descriptions
PO: Sets the power over-limit value.
Bits 15 – 0 If the value of the Power Register (05h) exceeds this limit, the OLP bit of the Status Register (01h) is set to '1' and
the Overlimit pin asserts if the OLEN bit is set.
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
BOO12 BOO11 BOO10 BOO9 BOO8 BOO7 BOO6 BOO5 BOO4 BOO3 BOO2 BOO1 BOO0 — OLP OLL
NAME
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
Bit Descriptions
BOO: Sets the bus over-voltage over-limit value.
Bits 15 – 3 If a Bus Voltage Register (04h) value exceeds this limit, the OLOV bit of the Status Register (01h) is set to '1' and
the Overlimit pin asserts if the OLEN bit is set.
OLP: The Over-Limit Polarity bit sets the Overlimit pin polarity.
Bit 1 1 = Inverted (asserts high)
0 = Normal (asserts low) (default)
OLL: The Over-Limit Latch bit configures the latching feature of the Overlimit pin.
Bit 0 1 = Latch enabled
0 = Transparent (default)
BIT # D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
BIT
BUO12 BUO11 BUO10 BUO9 BUO8 BUO7 BUO6 BUO5 BUO4 BUO3 BUO2 BUO1 BUO0 — — —
NAME
POR
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
VALUE
Bit Descriptions
BUO: Sets the bus under-voltage over-limit value.
Bits 15 – 3 If a Bus Voltage Register (04h) value is below this limit, the OLUV bit of the Status Register (01h) is set to '1' and
the Overlimit pin asserts if the OLEN bit is set.
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