THMC50_08 Datasheet, PDF (25/34 Pages) Texas Instruments – REMOTE/LOCAL TEMPERATURE MONITOR AND FAN CONTROLLER WITH SMBus INTERFACE

THMC50
REMOTE/LOCAL TEMPERATURE MONITOR AND
FAN CONTROLLER WITH SMBus INTERFACE
SLIS090 – JULY 1999
PRINCIPLES OF OPERATION
register 0x41 interrupt status register
power-on default <7:0> = 00h
BIT
NAME
READ/WRITE
DESCRIPTION
0 Ambient temperature error Read only
A 1 indicates one of the ambient temperature limits has been exceeded.
1 Reserved
Read only
Undefined (reserved for remote thermal diode 2 temperature error)
2 Reserved
Read only
Undefined (reserved for remote thermal diode 2 fault)
3 Reserved
Read only
Undefined
4 GPI input
Read only
A 1 indicates that the GPI terminal is asserted. The polarity of the GPI terminal is
determined by GPI invert (bit 6) in the configuration register. For example, if GPI invert is
cleared, then this bit is 1 when the GPI terminal is high (1); this bit is 0 when the GPI
terminal is low (0). If GPI invert is set, then this bit is 1 when the GPI terminal is low (0); this
bit is 0 when the GPI terminal is high (1). Note: The state of GPI is not latched; this bit
simply reflects the state or inverted state of the GPI terminal. If this bit is 1, reading this
register does not clear it to 0.
5 Remote temperature error Read only
A 1 indicates one of the remote thermal diode limits has been exceeded.
6 THERM input
Read only
A 1 indicates that the thermal overload (THERM) line has been asserted externally.
7 Remote diode fault
Read only
A 1 indicates either a short or open circuited fault on the remote thermal diode inputs.
NOTE: An error that causes continuous interrupts to be generated may be masked in its respective mask register, until the error can be alleviated.
register 0x43 interrupt mask register
power-on default <7:0> = 00h
BIT
NAME
READ/WRITE
DESCRIPTION
0 Ambient temperature error Read/write
A 1 disables the corresponding interrupt status bit for the INT output.
1 Reserved
Read only
Undefined (reserved for remote thermal diode 2 temperature error)
2 Reserved
Read only
Undefined (reserved for remote thermal diode 2 fault)
3 Reserved
Read only
Undefined
4 GPI input
Read/write
A 1 disables the corresponding interrupt status bit for the INT output.
5 Remote temperature error Read/write
A 1 disables the corresponding interrupt status bit for the INT output.
6 THERM input
Read/write
A 1 disables the corresponding interrupt status bit for the INT output.
7 Remote diode fault
Read/write
A 1 disables the corresponding interrupt status bit for the INT output.
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