LM89

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SNIS128D – AUGUST 2002 – REVISED JUNE 2014

Power up default is with all bits “0” (zero)

D7: ALERT mask: When set to “1” ALERT interrupts are masked.

D6: RUN/STOP: When set to “1” SHUTDOWN is enabled.

D5: is not defined and defaults to “0”.

D4: Remote T_CRIT mask: When set to “1” a diode temperature reading that exceeds T_CRIT setpoint will not

activate the T_CRIT_A pin.

D3: is not defined and defaults to “0”.

D2: Local T_CRIT mask: When set to “1” a Local temperature reading that exceeds T_CRIT setpoint will not

activate the T_CRIT_A pin.

D1: is not defined and defaults to “0”.

D0: Fault Queue: when set to “1” three consecutive remote temperature measurements outside the HIGH, LOW,

or T_CRIT setpoints will trigger an “Outside Limit” condition resulting in setting of status bits and associated

output pins..

9.6.5 Conversion Rate Register

Table 6. Conversion Rate Register (Read Address 04h

/Write Address 0Ah)

Value

Conversion Rate

00

62.5 mHz

01

125 mHz

02

250 mHz

03

500 mHz

04

1 Hz

05

2 Hz

06

4 Hz

07

8 Hz

08

16 Hz

09

32 Hz

10-255

Undefined

9.6.6 Local And Remote High Setpoint Registers (LHS, RHSHB, And RHSLB)

Table 7. Local And Remote High Setpoint Registers (LHS, RHSHB) (Read Address 05h, 07h /Write

Address 0Bh, 0Dh):

BIT

D7

D6

D5

D4

D3

D2

D1

D0

Value

SIGN

64

32

16

8

4

2

1

For LHS and RHSHB: HIGH setpoint temperature data. Power up default is LHIGH = RHIGH = 70°C. 1 LSB =

1°C. Two's complement format.

Table 8. Local And Remote High Setpoint Registers (RHSLB) (Read/Write Address 13h):

BIT

D7

D6

D5

D4

D3

D2

D1

D0

Value

0.5

0.25

0.125

0

0

0

0

0

For RHSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0°C. 1 LSB = 0.125°C.

Two's complement format.

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