Datasheet

LM96000
www.ti.com SNAS234C –APRIL 2004–REVISED MARCH 2013
4.18 Registers 67-69h: Temperature Limit
Register Read/ Register Bit 7 Bit 0 Default
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Lock?
Address Write Name (MSB) (LSB) Value
67h R/W Zone1 7 6 5 4 3 2 1 0 5Ah ✓
Fan
Temp
Limit
68h R/W Zone2 7 6 5 4 3 2 1 0 5Ah ✓
Fan
Temp
Limit
69h R/W Zone3 7 6 5 4 3 2 1 0 5Ah ✓
Fan
Temp
Limit
These are the temperature limits for the individual zones. When the current temperature equals this limit, the fan
will be turned on if it is not already. When the temperature exceeds this limit, the fan speed will be increased
according to the algorithm set forth in the Auto Fan Range, PWM Frequency register description.
Default = 90°C = 5Ah (1)
This register becomes Read Only when the Ready/Lock/Start/Override register Lock bit is set. Any further
attempts to write to this register shall have no effect. After power up the default value is used whenever the
Ready/Lock/Start/Override register Start bit is cleared even though modifications to this register are possible.
Table 10. Temperature Limit vs Register Setting
Temperature Reading (Decimal) Reading (Hex)
−127°C −127 81h
. . .
. . .
. . .
−50°C −50 CEh
. . .
. . .
. . .
0°C 0 00h
. . .
. . .
. . .
50°C 50 32h
. . .
. . .
. . .
127°C 127 7Fh
Copyright © 2004–2013, Texas Instruments Incorporated Submit Documentation Feedback 29
Product Folder Links: LM96000