Rainbow-electronics LM40 Manual de usuario descargar pdf (Pagina 23)

2.0 Register Set (Continued)

Analog Input Voltage Mapping

Sensor

Number

(SNUM) Voltage Input

Input Voltage

for Nominal

Reading

(code 384 or

180h)

Maximum

Input Voltage

(code 510.5)

Reading at

Maximum

Voltage

Minimum

Input Voltage

Reading at

Minimum

Voltage Resolution

0 +2.5V 2.5V 3.32V to 6V 1FFh -0.5V to

3.26mV

00h 6.51mV

1 +1.2V 1.2V 1.6V to 6V 1FFh -0.5V to

2.63mV

00h 5.86mV

2 +3.3V_SBY

(V+)

3.3V 4.39V to 6V 1FFh 3.0V 15Dh 8.59mV

3 +5V 5V 6.65V 1FFh -0.5V to

6.51mV

00h 13.02mV

4 +12V 12V 15.95V to 16V 1FFh -0.5V to

15.63mV

00h 31.25mV

2.10.4 Voltage Control (Addr: 010 010; 12h)

This register is set to the reset value by a Device Reset.

Reg

Add

Name

Val

Bit

MSb

Bit

LSb

010 010

Voltage

Control

1Fh

Reserved

EN4 EN3 EN2 EN1 EN0 ATE

Low Rate Function

(Read Only)

00000 11111

Bit Type Description

4-0 RO Low Rate Function This function is not supported by the LM40 and therefore this field is read only.

5 R/W ATE (Attention Enable). When set, this bit enables an Attention Request signal to be generated by the

LM40, if one or more EN0-EN4 bits of this register are set.

0: Attention Request disabled (from enabled Temperature Sensor- default)

1: Attention Request enabled

6 R/W EN0 (Enable Sensor 0). When this bit is set, the Voltage Sensor 0 is enabled for voltage measurements.

0: Voltage Sensor disabled (default)

1: Voltage Sensor enabled

10-7 R/W EN1-EN4 (Enable Sensor 1-4). Same as EN0 for Voltage sensors 1-4.

0: Voltage Sensor disabled (default)

1: Voltage Sensor enabled

15-11 RO Reserved. Will always read "0".

2.11 CONVERSION RATE (Addr: 100 000; 20h)

Reg Add Register Name

Val

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1

Bit 0

LSb

100 000 Conversion Rate

Reserved

CR1 CR0

000000

Bit Type Description

1-0 RO CR0 and CR1 (Conversion Rate bits 0 and 1) These bits control the conversion rate of the LM40 for

more details see Table Conversion Rate Control and desciption below.

LM40

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