AS39513 datasheet(56/108 Pages) AMSCO

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[v1-10] 2018-Apr-25

AS39513 − Detailed Description

DIMD[1:0] – Input mode for DIN pin (when not in SPI

communication).

2’b00 = CMOS input, non-inverting 100k ohm pull down to

ground enabled.

2’b01 = Digital sensor input with pull up. Pull-up current is

supplied to DIN only during a logging event.

2’b10 = Use the DIN pin for startup. When in the WAIT state, a

pull-up current is supplied to DIN. A falling edge on DIN

manually causes a transition from WAIT mode to ACTIVE mode.

If TMSRT is also 1, the event that happens first (delay or DIN

input) causes the transition from WAIT mode to ACTIVE mode.

2’b11 = Use the DIN pin for a logging interrupt. During ACTIVE

mode, a pull-up current is supplied to DIN. A falling edge on

DIN generates a logging event.

DLOG – Add the digital input and external sensor interrupt

values to the data that is logged. The two-bit value { din_i,

extirq_i } is added to the logging data.

0 = No status logging of the digital input and external sensor

interrupt.

1 = Add logging of the digital input and external sensor

interrupt.

DOMD[1:0] – Digital output mode (when not in SPI

communication).

2’b00 = CMOS (push-pull) output.

2’b01 = Pull-up output.

2’b10 = Pull-down output. DOUT is inverted relative to DOSRC

description below.

2’b11 = High impedance (disconnected) output. Default.

DOSRC[1:0] – Digital output source (when not in SPI

communication).

2’b00 = DOUT is a copy of the external interrupt comparator

output.

2’b01 = DOUT is high when an ISO 15693 command has been

recognized and is being processed.

2’b10 = DOUT is high when the RF field is available.

2’b11 = DOUT is the logical OR of EEFULL, ADCERR, LOWBAT,

and OVLIM. If OSCEN=1, the output is AND’d with a modulated

signal that is 1/32 second high (32 counts of osc1k) and 31/32

second low (992 counts of osc1k).

BATCHK – Battery check at the start of logging.

0 = No battery check.

1 = Do a battery check in order to qualify the logging.

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