AS8515 datasheet(32/65 Pages) AMSCO

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AS8515

Datasheet - AS8515 Bottom Die Overvi ew

Figure 20. Normal Mode 2

8.7.3 Standby Mode1 (SBM1)

The low-power Standby Mode can be entered only through the STOP state. Transition to SBM1 mode occurs when the “START BIT” D0 of Mode

Control register MOD_CTL_REG in Table 49 is set to “1” and Mode Control Bits to “10” through SPI. In this mode the date rate is programmable

with the time of Ta. An interrupt signal is generated on INT at the rate of Ta seconds, and with a pulse width of eight cycles of lp_clk. The data is

stable up to the next interrupt. The functionality is illustrated in Figure. During the period of Ta, only one data sample is made available and,

during the rest of the period, the device is maintained in STOP state to reduce power consumption. The microcontroller which receives the data

on the Interrupt, is also expected to be processing the data for a short time as shown clearly in the Figure 21 to ensure the overall low-power

consumption of the data acquisition and processing system.

Figure 21. Standby Mode 1

IDD

TMC

Sampling with f

ITHS

V,I,T

I > ITHS

V,I,T

I < I THS

INT

T INT

MCU

ADC

Start SBM1

sec.

Ta sec.

sec.

I DD

V, I, T

MCU

conv

MCU

INT

Channel

DATA Register

DATA – A1

DATA – A0

DATA – A2

DATA – A3

TINT

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