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AS3931

Datasheet - Configuring the Product

9.4.3 T3

Not used; must always be programmed to 0 by the user!

9.4.4 T4 (RSSI Step Select)

Bit T4 is used to switch between a high and a low RSSI step. For more information on RSSI steps see Extended Operation on page 24.

9.4.5 T5 (Wake Generator On/Off)

Bit T5 is used to activate the Wake Generator. If activated, an artificial parasitic wakeup is generated every 2 hours.

9.5 Correlator Mode Register

0

1

not used

1

1

not used

Table 20. T4 Bit Mode

T4

Mode

0Low RSSI step

1

High RSSI step

Table 21. T5 Bit Mode

T5

Mode

0

Wake Generator off

1

Wake Generator on

Table 22. Register Data

Bit

POR state

Description

M0

0

Correlator Off

M1

0

single/double wake pattern

M2

0

Zero-Bit Detection Mode bit1

M3

1

Zero-Bit Detection Mode bit2

M4

1

detector threshold

τ select

M5

0

not used

Table 23. Register Address

Bit

Value

A0

1

A1

1

Table 19. T1, T2 Bit Mode

T1

T2

WAKE Pin Function