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AS3931

Datasheet - Configuring the Product

9.3.4 C5 (WAKE Clear)

Bit C5 is used to reset the active low WAKE pin after the pin has been set as a result of receiving a valid code word (single or double wake

pattern) by one of the 3 channels, a POR or an internally generated Wakeup. Setting Bit C5 to 1, the WAKE pin is reset to high and held in high

state, to enable the channels for the next wake up signal, the bit C5 must be toggled to 0 afterwards. After power on, the WAKE-pin is activated

and the bit C5 has to be toggled high and low after a power on.

9.4 Test Mode Register

9.4.1 T0 (Test Mode Enable)

Bit T0 is used to define the pin function of the WAKE pin. When bit T0 is reset to 0, the WAKE pin is used for normal Wake Up detection (Single

or Double Wakeup from the receiver channels or internally generated wakeup). When bit T0 is set to 1, testmode signals are multiplexed to the

WAKE pin according to the selected test mode (T1, T2). After power on, the normal wake up detection mode is selected.

9.4.2 T1, T2 (Test Mode Select)

When bit T0 is set to 1, the following signals can be mapped to the WAKE pin. For signal description (see Figure 13).

DATA: received bit stream of the selected channel

WAKE: detected wake up of the selected channel

For the DATA and WAKE signal select the desired channel by setting Bits C0 and C1.

Table 15. C5 Bit Mode

C5

Mode

0

no effect

1

WAKE=H

Table 16. Register Data

Bit

POR state

Description

T0

0

Test mode enable

T1

0

Test mode select Bit 1

T2

0

Test mode select Bit 2

T3

0

not used

T4

1

RSSI step

T5

0

WAKE Generator on/off

Table 17. Register Address

Bit

Value

A0

0

A1

1

Table 18. T0 Bit Mode

T0

WAKE Pin function

0

WAKE

1

Test Mode Signals

Table 19. T1, T2 Bit Mode

T1

T2

WAKE Pin Function

0

0

DATA of selected channel

1

0

WAKE of selected channel