Rainbow Electronics LM99 - Manual (Page 16)

2.0 LM99 Registers
(Continued)
2.4 CONFIGURATION REGISTER
(Read Address 03h / Write Address 09h):
D7 D6 D5 D4 D3 D2 D1 D0
ALERT mask RUN/STOP 0
Remote T_CRIT_A
mask
0
Local T_CRIT_A
mask
0 Fault Queue
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_A mask: When set to “1” a diode temperature reading that exceeds T_CRIT_A setpoint will not activate the
T_CRIT_A pin.
D3: is not defined and defaults to “0”.
D2: Local T_CRIT_A mask: When set to “1” a Local temperature reading that exceeds T_CRIT_A 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..
2.5 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
(Read Address 04h / Write Address 0Ah)
Value Conversion Rate
06 4 Hz
07 8 Hz
08 16 Hz
09 32 Hz
10-255 Undefined
2.6 LOCAL and REMOTE HIGH SETPOINT REGISTERS (LHS, RHSHB, and RHSLB)
(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-on default is LHIGH = RHIGH = 70˚C. 1 LSB = 1˚C. Two’s
complement format.
(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–on default is 0˚C. 1 LSB = 0.125˚C. Two’s complement
format.
2.7 LOCAL and REMOTE LOW SETPOINT REGISTERS (LLS, RLSHB, and RLSLB)
(Read Address 06h, 08h, / Write Address 0Ch, 0Eh):
BIT D7 D6 D5 D4 D3 D2 D1 D0
Value SIGN 64 32 16 8 4 2 1
For LLS and RLSHB: HIGH setpoint temperature data. Power-on default is LHIGH = RHIGH = 0˚C. 1 LSB = 1˚C. Two’s
complement format.
(Read / Write Address 14h):
BIT D7 D6 D5 D4 D3 D2 D1 D0
Value 0.5 0.25 0.125 0 0 0 0 0
For RLSLB: Remote HIGH Setpoint Low Byte temperature data. Power-on default is 0˚C. 1 LSB = 0.125˚C. Two’s complement
format.
LM99
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