Rainbow-electronics AT73C246 Bedienungsanleitung PDF herunterladen (Seite 32)

11050A–PMAAC–07-Apr-10

AT73C246

When RUN state is reached from the POWERDOWN state, the power supplies are sequentially

started-up according to the Figure 11-5

Figure 11-5. AT73C246 - POWERDOWN to RUN state Supplies Start-Up timing diagram..

Table 11-4. POWERDOWN to RUN state timing table

Symbol Parameter Comments Min Typ Max Units

ON_SYS

POWER-ON Event Detection Time 1.7 1.8 1.9 ms

ON_VDD0

VDD0 Start-up Time 5 5.3 5.6 ms

ON_VDD1

VDD1 Start-up Time 5 5.3 5.6 ms

ON_VDD2

VDD2 Start-up Time 5.2 5.5 5.8 ms

ON_VDD3

VDD3 Start-up Time 5.2 5.5 5.8 ms

RESET

All Regulators ON To RSTB High 30.4 32 33.6 ms

POWERDOWN

STATE

SUPPLIES START UP

ON_SYS

RUN STATE

VDD3 (3.3V)

ON_VDD3

VDD0 (1.85V)

ON_VDD0

VDD1 (1.2V)

TON_VDD1

VDD2 (1V)

3.3V

1.85V

1.2V

ON_VDD2

RSTB

VPAD LEVEL

RESET

PWREN

EVENT

SEQUENCE A SEQUENCE B

POWERDOWN

STATE

SUPPLIES START UP

ON_SYS

RUN STATE

VDD2 (1V)

ON_VDD2

VDD0 (1.85V)

ON_VDD0

VDD1 (1.2V)

TON_VDD1

VDD3 (3.3V)

1.85V

1.2V

3.3V

TON_VDD3

RSTB

VPAD LEVEL

RESET

PWREN

EVENT

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 158 159

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