Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - temperature management Internal, External 2-wire serial, I²C TSSOP 24

LM96080

SNAS465D –SEPTEMBER 2009–REVISED MARCH 2013

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Bit Name Read/Write Description

7 OS Bit Interrupt Read/Write

A zero selects the default interrupt mode which gives the user an interrupt if the temperature

Mode Select

goes above the OS limit. The interrupt will be cleared once the status register is read, but it will

again be generated when the next conversion has completed. It will continue to do so until the

temperature goes below the hysteresis limit.

A one selects the one time interrupt mode which only gives the user one interrupt when it goes

above the OS limit. The interrupt will be cleared once the status register is read. Another interrupt

will not be generated until the temperature goes below the hysteresis limit. It will also be cleared

if the status register is read. No more interrupts will be generated until the temperature goes

above the OS limit again. The corresponding bit will be cleared in the status register every time it

is read but may not set again when the next conversion is done. (Refer to Figure 21).

Fan Divisor/RST_OUT/OS Register —Address 05h

Power on – <7:0> is 0001 0100

Bit Name Read/Write Description

0 FAN1 Mode Select Read/Write A one selects the level sensitive input mode while a zero selects Fan count mode for the FAN1

input pin.

1 FAN2 Mode Select Read/Write A one selects the level sensitive input mode while a zero selects Fan count mode for the FAN2

input pin.

2-3 FAN1 RPM Control Read/Write FAN1 Speed Control.

<3:2> = 00 - divide by 1;

<3:2> = 01 - divide by 2;

<3:2> = 10 - divide by 4;

<3:2> = 11 - divide by 8.

If level sensitive input is selected: <2> = 1 selects and active-low input (An interrupt will be

generated if the FAN1 input is Low), <2> = 0 selects an active-high input (an interrupt will be

generated if the FAN1 input is High).

4-5 FAN2 RPM Control Read/Write FAN2 Speed Control.

<5:4> = 00 - divide by 1;

<5:4> = 01 - divide by 2;

<5:4> = 10 - divide by 4;

<5:4> = 11 - divide by 8.

If level sensitive input is selected: <4> = 1 selects and active-low input (An interrupt will be

generated if the FAN2 input is Low), <4> = 0 selects an active-high input (an interrupt will be

generated if the FAN2 input is High).

6 OS Pin Enable Read/Write A one enables OS mode on the RST_OUT/OS output pin, while bit 7 of this register is set to

zero. If bits 6 and 7 of this register are set to zero, the RST_OUT/OS pin is disabled.

7 RST Enable Read/Write A one sets the RST_OUT/OS pin in the RST_OUT mode instead of the OS mode. If bits 6 and

7 of this register are set to zero, the RST_OUT/OS pin is disabled.

OS Configuration/Temperature Resolution Register—Address 06h

Power on default <7:0> = 0000 0001 binary

Bit Name Read/Write Description

0 OS Status Read only Status of the OS. This bit mirrors the state of the RST_OUT/OS pin when in the OS mode.

1 OS Polarity Read/Write A zero selects OS to be active-low, while a one selects OS to be active high. OS is an open-

drain output.

2 OS Mode Select Read/Write A one selects the one time interrupt mode for OS, while a zero selects comparator mode for

OS. (See Temperature Data Format)

3 Temperature Read/Write A zero selects the default 8-bit plus sign resolution temperature conversions, while a one

Resolution Control selects 11-bit plus sign resolution temperature conversions.

Product Folder Links: LM96080