Rainbow-electronics MAX1362 Manual do Utilizador descarregar pdf (Página 14)

MAX1361/MAX1362

4-Channel, 10-Bit, System Monitor with Programmable

Trip Window and SMBus Alert Response

14 ______________________________________________________________________________________

START

CONDITION

START

ADDRESS

FROM THE MASTER

CONFIGURATION

BYTE FROM THE MASTER

SETUP

BYTE FROM THE MASTER

0 A A A STOP

R/W BIT FROM

THE MASTER

Figure 8. Example of Writing Setup and Control Bytes

START

CONDITION

START

ADDRESS

FROM THE MASTER

SETUP BYTE

FROM THE MASTER

MONITOR

SETUP BIT

ALARM RESET, SCAN

SPEED, INT_EN

0A 1A A

CH 0 LT [11:4] CH 0 LT [3:0]; UT [11:8] CH 1 LT [11:4]CH 0 UT [7:0]AAAASTOP

R/W BIT FROM

THE MASTER

Figure 9. Example of Extended Setup-Byte Writing

BIT

NAME

DESCRIPTION

7(MSB) CONFIG

The configuration byte always starts with 0.

SCAN1

SCAN0

SCAN1, SCAN0 = [0,0], scans from channel 0 to the upper channel chosen by CS1, CS0.

SCAN1, SCAN0 = [0,1], converts a single channel chosen by CS1, CS0 eight times.

SCAN1, SCAN0 = [1,0] monitor mode monitors from channel 0 to the upper channel chosen by CS1, CS0.

SCAN1, SCAN0 = [1,1], single channel conversion for the channel is chosen by CS0, CS1.

4 CS3

3 CS2

CS3, CS2 = [1,1] enables readback of monitor-mode setup data.

2 CS1

1 CS0

Selects the upper limit of the channel range used for the conversion sequence in scan modes SCAN = [0,0]

and monitor modes SCAN = [1,0].

Selects the conversion channel when SCAN = [0,1] or when SCAN = [1,1].

(Tables 5 and 6)

SE/DIF

1 = single-ended inputs.

0 = differential inputs.

AIN0 and AIN1 form the first differential pair and AIN2 and AIN3 form the second differential pair. (See Tables

4 and 5.)

Selects single-ended or differential conversions. In single-ended mode, input signal voltages are referenced

to GND. In differential mode, the voltage difference between two channels is measured.

When single-ended mode is used, the MAX1361/MAX1362 perform unipolar conversions regardless of the

UNI/BIP bit in the setup byte.

(Table 7)

Table 2. Configuration Byte Format*

*Power-on defaults: 0x01

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 23 24

MAX1361/MAX1362 1

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