Rainbow Electronics LM80 - Manual (Page 23)

Functional Description
(Continued)
12.3 Configuration Register — Address 00h
Power on default < 7:0 > = 00001000 binary
Bit Name Read/
Write
Description
0 Start Read/Write A one enables startup of monitoring operations, a zero puts the part in standby mode.
Note: The outputs of Interrupt pins will not be cleared if the user writes a zero to this
location after an interrupt has occurred unlike “INT_Clear” bit.At start up, limit checking
functions and scanning begin. Note, all limits should be set in the Value RAM before
setting this bit HIGH.
1 INT Enable Read/Write A one enables the INT Interrupt output.
2 INT polarity
select Read/Write A one selects an active high open source output while a zero selects an active low
open drain output.
3 INT_Clear Read/Write A one disables the INT and RST_OUT/OS outputs without affecting the contents of
Interrupt Status Registers. The device will stop monitoring. It will resume upon clearing
of this bit.
4 RESET Read/Write A one outputs at least a 10 ms active low reset signal at RESET, if < 7 > = 1 and
< 6 > = 0 in the Fan Divisor/RST_OUT/OS Register. This bit is cleared once the pulse
has gone inactive.
5 Chassis Clear Read/Write A one clears the CI (Chassis Intrusion) pin. This bit clears itself after the CI pins
cleared.
6 GPO Read/Write A one in this bit drives a one on GPO (General Purpose Output) pin.
7 INITIALIZATION Read/Write A one restores power on default value to the Configuration Register, Interrupt Status
Registers, Interrupt Mask Registers, Fan Divisor/RST_OUT/OSRegister, and the OS
Configuration/Temperature Resolution Register. This bit clears itself since the power
on default is zero.
LM80
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