Rainbow Electronics LM85 - Manual (Page 25)

Functional Description
(Continued)
Item No. Description LM85CIMQ LM85BIMQ
4 Overide bit (register 40h bit 3)
function with disabled PWM output
(Fan configuration registers
5Ch-5Eh, bits
fan_config[7:5]=ZON[2:0]=100
The override bit has no effect when
the PWM output is disabled.
The overide bit has precedance
over all of the PWM output dissable
bits. Therefore, if a PWM output is
dissabled, setting the override bit
will set the PWM output to 100%.
5 Auto Fan mode and Absolute
Temperature Limit function
Only the PWM output associated
with the zone that has exceeded its
Absolute Limit will increase to
100%.
When one zone exceeds its
Absolute Limit all PWM outputs wil
increase to 100%.
6 Register 3Fh Device ID default 60h 62h
Revision History
Date Revision
8/2002 Added LM85BIMQ functional differences and specifications.
3/2003 Updated Register 74h, Tachometer Monitor Mode description.
LM85
www.national.com 25