10

4694E–AUTO–08/05

ATA5282

In case of corrupted data or in a noisy environment, the controller also may use the serial

interface to reset the ATA5282 to the initial state. This is performed by shifting a specific com-

mand into the internal command register.

Figure 3-7.

Wake-up Protocol for 125-kHz ASK Modulation

320 periods

of 125 kHz

about 2.5 ms

about 1 ms

Internally

demodulated

signal

Internal

wake-up

NDATA/

NWAKEUP

Header

detection

0.5 ms

n Bit Data

01

Input

signal

Input

signal

Synch

Header

Preamble

End of Data

32 periods of

125 kHz

1

16

periods

off

Header

valid

Internal

wake-up

20 ms no

signal

NDATA/

NWAKEUP

32

periods

off

16

periods

on