MAXQ3180(2008) Ver la hoja de datos (PDF) - Maxim Integrated

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Fabricante

MAXQ3180
(Rev.:2008)

Low-Power, Multifunction, Polyphase AFE

Maxim Integrated 

Low-Power, Multifunction, Polyphase AFE

POWER-ON

RESET

CLEAR EXTCLK = 0

SET RST = 1

POWER-ON

RESET

CLEAR

LOWPM = 0

HARDWARE

RESET

DRIVE RESET LOW

SOFTWARE

RESET

INITIALIZATION

MODE

CLEAR ALL REGISTERS

TO DEFAULT STATES

CLEAR LOWPM = 0

SET RST = 1

SET NOINIT = 1,

DRIVE IRQ LOW

CLEAR NOINIT = 0

SET

LOWPM = 1

EXTERNAL

RESET

LPMM

(LOWPM = 1)

POWER

MODE?

NORMAL

(LOWPM = 0)

LOW-POWER

MEASUREMENT

MODE

SET

STOPM = 1

MASTER DRIVES

SSEL LOW

STOP MODE

RUN MODE

SET

STOPM = 1

INDICATES THAT COMMANDS FROM THE MASTER CAN BE RECEIVED IN THIS MODE.

Figure 1. Operating Modes

return to a high state, the MAXQ3180 comes out of

reset and goes into Initialization Mode. All registers

are cleared to their default states when exiting Stop

Mode in this manner.

• External Interrupt. Driving the SSEL pin low causes

the MAXQ3180 to exit Stop Mode without undergoing

a reset cycle. When exiting Stop Mode in this man-

ner, all register and configuration settings are

retained, and the MAXQ3180 automatically resumes

electric-metering functions and sample processing.

Note that when the master is communicating with the

MAXQ3180, the SSEL line is normally driven low at the

beginning of each SPI command. This means that if the

master sends an SPI command after the MAXQ3180

enters Stop Mode, the MAXQ3180 automatically exits

Stop Mode and receives the command.

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