Rainbow-electronics AT73C246 Manual do Utilizador descarregar pdf (Página 30)

11050A–PMAAC–07-Apr-10

AT73C246

Figure 11-3. AT73C246 - RUN to POWERDOWN state Supplies Shutdown timing diagram.

Note: 1. VDDx activity during RUN state is set by Bit7 of register VDDx_CTRL.

Table 11-2. RUN to POWERDOWN state timing table

Symbol Parameter Comments Min Typ Max Units

PWRDOWN

POWERDOWN Event detection

time

58 62 66 µs

OFF_AUDIO

Audio CODEC Shutdown Time

Audio CODEC is OFF or Power Fail

Occurs

58 62 66 µs

Audio CODEC is ON 486 512 538 ms

OFF_VDDx

VDDx SHUTDOWN Time

VDDx is OFF in RUN state

(1)

58 62 66 µs

VDDx is ON in RUN state

(1)

4.8 5.2 5.4 ms

RUN

STATE

SUPPLIES SHUTDOWN

POWEROFF

EVENT

POWERDOWN

STATE

PWRDOWN

OFF_AUDIO

OFF_VDD3

DD3

(3.3V)

DD1

(1.2V)

DD2

(1V)

3.3V

1.2V

RSTB

DD0

(1.85V)

OFF_VDD1

OFF_VDD0

OFF_VDD2

DD4

(CODEC)

OFF_VDD4

1.85V

RUN

STATE

SUPPLIES SHUTDOWN

POWEROFF

EVENT

POWERDOWN

STATE

PWRDOWN

OFF_AUDIO

OFF_VDD2

DD2

(1V)

DD1

(1.2V)

DD3

(3.3V)

1.2V

3.3V

RSTB

DD0

(1.85V)

OFF_VDD1

OFF_VDD0

OFF_VDD3

DD4

(CODEC)

OFF_VDD4

1.85V

SEQUENCE A SEQUENCE B

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 158 159

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