Rainbow-electronics LM86 Manual do Utilizador descarregar pdf (Página 14)

2.0 LM86 REGISTERS (Continued)

Command Select Address Power On Default State Register

Name

Read Address

P7:P0

hex

Write Address

P7:P0

hex

D7:D0

binary

D7:D0

decimal

11h 11h 0000 0000 0 RTOHB Remote Temperature Offset

High Byte

12h 12h 0000 0000 0 RTOLB Remote Temperature Offset

Low Byte

13h 13h 0000 0000 0 RHSLB Remote HIGH Setpoint Low

Byte

14h 14h 0000 0000 0 RLSLB Remote LOW Setpoint Low

Byte

19h 19h 0101 0101 85 RCS Remote T_CRIT Setpoint

20h 20h 0101 0101 85 LCS Local T_CRIT Setpoint

21h 21h 0000 1010 10 TH T_CRIT Hysteresis

B0h-BEh B0h-BEh Manufacturers Test Registers

BFh BFh 0000 0000 0 RDTF Remote Diode Temperature

Filter

FEh NA 0000 0001 1 RMID Read Manufacturer’s ID

FFh NA 0001 0001 17 RDR Read Stepping or Die Revision

Code

2.2 LOCAL and REMOTE TEMPERATURE REGISTERS (LT, RTHB, RTLB)

(Read Only Address 00h, 01h):

BIT D7 D6 D5 D4 D3 D2 D1 D0

Value SIGN 64 32 16 8 4 2 1

For LT and RTHB D7–D0: Temperature Data. LSB = 1˚C. Two’s complement format.

(Read Only Address 10h):

BIT D7 D6 D5 D4 D3 D2 D1 D0

Value 0.5 0.25 0.125 00000

For RTLB D7–D5: Temperature Data. LSB = 0.125˚C. Two’s complement format.

The maximum value available from the Local Temperature register is 127; the minimum value available from the Local

Temperature register is -128. The maximum value available from the Remote Temperature register is 127.875; the minimum value

available from the Remote Temperature registers is −128.875.

2.3 STATUS REGISTER (SR)

(Read Only Address 02h):

D7 D6 D5 D4 D3 D2 D1 D0

Busy LHIGH LLOW RHIGH RLOW OPEN RCRIT LCRIT

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

D0: LCRIT: When set to “1” indicates a Local Critical Temperature alarm.

D1: RCRIT: When set to “1” indicates a Remote Diode Critical Temperature alarm.

D2: OPEN: When set to “1” indicates a Remote Diode disconnect.

D3: RLOW: When set to “1” indicates a Remote Diode LOW Temperature alarm

D4: RHIGH: When set to “1” indicates a Remote Diode HIGH Temperature alarm.

D5: LLOW: When set to “1” indicates a Local LOW Temperature alarm.

D6: LHIGH: When set to “1” indicates a Local HIGH Temperature alarm.

D7: Busy: When set to “1” ADC is busy converting.

LM86

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