Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- OPERATING RATINGS
- DC ELECTRICAL CHARACTERISTICS
- OPERATING ELECTRICAL CHARACTERISTICS
- AC ELECTRICAL CHARACTERISTICS
- DIGITAL ELECTRICAL CHARACTERISTICS
- SMBus LOGICAL ELECTRICAL CHARACTERISTICS
- SMBus DIGITAL SWITCHING CHARACTERISTICS
- FUNCTIONAL DESCRIPTION
- LM63 REGISTERS
- APPLICATION NOTES
- Revision History
LM63
SNAS190E –SEPTEMBER 2002–REVISED MAY 2013
www.ti.com
Table 6. Configuration Register
ADDRESS READ/ POR
BITS NAME DESCRIPTION
HEX WRITE VALUE
03 (09)
HEX
CONFIGURATION REGISTER
When this bit is a 0, ALERT interrupts are enabled.
ALERT
7 0 When this bit is set to a 1, ALERT interrupts are masked, and the
Mask
ALERT pin is always in a high-impedance (open) state.
When this bit is a 0, the LM63 is in operational mode, converting,
comparing, and updating the PWM output continuously.
When this bit is a 1, the LM63 enters a low-power standby mode.
6 0 STANDBY In STANDBY, continuous conversions are stopped, but a
conversion/comparison cycle may be initiated by writing any value to
register 0x0F. Operation of the PWM output in STANDBY depends
on the setting of bit 5 in this register.
When this bit is a 0, the LM63’s PWM output continues to output the
PWM Disable current fan control signal while in STANDBY.
5 0
in STANDBY When this bit is a 1, the PWM output is disabled (as defined by the
PWM polarity bit) while in STANDBY.
4:3 00 These bits are unused and always set to 0.
When this bit is a 0, the ALERT/Tach pin is an open drain ALERT
03 (09) R/W
output.
ALERT/Tach When this bit is a 1, the ALERT/Tach pin is a high-impedance
2 0
Select Tachometer input.
Note that if this bit is set, the function of the ALERT/Tach pin must be
Tach input, so an external ALERT condition will not occur.
The T_CRIT limit for the remote diode is nominally 85°C. This value
can be changed once after power-up by first setting this bit to a 1,
T_CRIT Limit
1 0 then programming a new T_CRIT value into the Remote Diode
Override
T_CRIT Limit (register 0x19). The T_CRIT value can not be changed
again except by cycling power to the LM63.
0: an ALERT will be generated if any Remote Diode conversion result
is above the Remote High Set Point or below the Remote Low
RDTS Fault Setpoint.
0 0
Queue 1: an ALERT will be generated only if three consecutive Remote
Diode conversions are above the Remote High Set Point or below
the Remote Low Setpoint.
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