AS8515 datasheet(30/65 Pages) AMSCO

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AS8515

Datasheet - AS8515 Bottom Die Overvi ew

8.7 Modes of Operation

The device operates in four different modes, namely,



Normal Mode 1 (NOM1)



Normal Mode 2 (NOM2)



Standby Mode 1 (SBM1)



Standby Mode 2 (SBM2)

The Normal Modes are full-power modes with the exception that in Normal Mode 2, sampling is normally at a programmed lower frequency and

is increased to a higher rate only when a measured input signal level crosses the programmed threshold in the current measurement channel.

The Standby Modes are lower power modes. Sampling is normally at a very low frequency interval. In Standby Mode 2, data sampling can be

carried out only when the internal comparator detects the input current to be greater than the programmed threshold and it generates interrupt on

the INT pin.

The device enters into the “Stop” state on Power On. This is a state where in the data path is inactive and can be entered into from any of the

four Modes. The State transition Diagram involving the state of Stop and the four Modes is illustrated in the Figure 18.

Figure 18. Finite State Machine Model of AS8515 Bottom Die

STOP

OTP_INT

RESET

NORM

A_STB

SBM_ON

SBM_OFF

stop

star

NORM

stop

Analog Stablization

period

Wait for 1.5msec

1.5msec &

NORM

SBM

Wait for TT1

timeout

Wait for x

number of

conversions

Wait for otp_load

Completes in 32 cycles

of lp_clk

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