AS39513 datasheet(57/108 Pages) AMSCO

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[v1-10] 2018-Apr-25

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AS39513 − Detailed Description

BTYPE[2:0] – Battery type algorithm to use.

3’b000 = Battery voltage is assumed to be nominally 1.5 V.

3’b001 = Battery voltage is assumed to be nominally 3.0 V.

If the BTYPE value is changed for example from 3V type to 1.5V

type, the new BTYPE value will only take effect after the next

power up of the chip. The temperature sensor accuracy is only

guaranteed if the chip is operated with a battery corresponding

to the BTYPE it was tested with.

BCKSEL[1:0] – Battery compare threshold. Threshold also

depends on whether the battery is a 3 V or 1.5 V type as

determined by the BTYPE[2:0] above. This is mapped directly to

bchk_sel_o. When BTYPE is set for 1.5V batteries, BCKSEL can

only have the default value BCKSEL[1:0] = 00. Please see

Figure 10 for the battery check threshold values.

TSMEAS – Enable temperature sensor logging.

0 = No temperature measurements.

1 = During logging, temperature measurements are made and

optionally recorded depending on the logging mode.

BVMEAS – Enable an ADC measurement of the battery voltage.

0 = No ADC measurement of the battery voltage is made or

logged.

1 = Enable ADC measurement and logging of the battery

voltage.

EXMEAS – Enable external sensor logging.

0 = No external sensor measurements.

1 = During logging, external sensor measurements are made

and optionally recorded depending on the logging mode.

EIEN – Enable external sensor interrupt.

0 = No external sensor interrupt.

1 = External sensor interrupt can trigger a logging event.

Interrupt will be triggered when the voltage on the SEXT pin

falls below the threshold defined by EXIVSET. Interrupt is

falling-edge sensitive, so the SEXT pin must rise above the

threshold before an additional sensor interrupt can be

triggered.

LOGMD[1:0] – Logging mode for all sensors.

2’b00 – Dense mode. Logging will occur for all logging events.

No measurement count or real-time clock values will be logged.

2’b01 – Interrupt mode. Logging will occur for all logging

events. Sensors are always logged to 10-bit accuracy. The

real-time clock value and interrupt source are logged. The

interrupt source is a two-bit value: 2’b01 = external sensor

interrupt, and 2’b10 = DIN interrupt.

2’b10 – Normal limit mode. Enable logging if any of the limit

check conditions are met. Sensors are always logged to 10-bit

accuracy. If a measurement is logged, the value of the

measurement counter is also logged.

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