Sequence a sequence b, Symbol parameter comments min typ max units t – Rainbow Electronics AT73C246 User Manual
Page 32
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. 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
T
ON_SYS
POWER-ON Event Detection Time
1.7
1.8
1.9
ms
T
ON_VDD0
VDD0 Start-up Time
5
5.3
5.6
ms
T
ON_VDD1
VDD1 Start-up Time
5
5.3
5.6
ms
T
ON_VDD2
VDD2 Start-up Time
5.2
5.5
5.8
ms
T
ON_VDD3
VDD3 Start-up Time
5.2
5.5
5.8
ms
T
RESET
All Regulators ON To RSTB High
30.4
32
33.6
ms
POWERDOWN
STATE
SUPPLIES START UP
T
ON_SYS
RUN STATE
VDD3 (3.3V)
T
ON_VDD3
VDD0 (1.85V)
T
ON_VDD0
VDD1 (1.2V)
T
ON_VDD1
VDD2 (1V)
3.3V
1.85V
1.2V
1V
T
ON_VDD2
RSTB
VPAD LEVEL
T
RESET
PWREN
EVENT
SEQUENCE A
SEQUENCE B
POWERDOWN
STATE
SUPPLIES START UP
T
ON_SYS
RUN STATE
VDD2 (1V)
T
ON_VDD2
VDD0 (1.85V)
T
ON_VDD0
VDD1 (1.2V)
T
ON_VDD1
VDD3 (3.3V)
1V
1.85V
1.2V
3.3V
T
ON_VDD3
RSTB
VPAD LEVEL
T
RESET
PWREN
EVENT