SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 424

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

www.national.com
Electrical Specifications
8.3.15 Power-Up Sequencing
Symbol
t
t
t
t
t
t
t
1
2
3
4
5
6
7
PWRCNT[2:1]
PWRBTN#
ONTCL#
V
POR#
CORE
V
Parameter
Voltage sequence
PWRBTN# inactive after V
applied, whichever is applied last
PWRBTN# active pulse width
ONCTL# inactive after V
Signal active after PWRBTN active
V
active
POR# inactive after V
applied
V
SBL
V
CORE
SB
Table 8-43. Power-Up Sequence Using the Power Button Timing Parameters
IO
Figure 8-55. Power-Up Sequencing With PWRBTN# Timing Diagram
and V
IO
applied after ONCTL#
t
1
(Continued)
CORE
t
SB
4
SB
t
applied
and V
2
or V
IO
SBL
Min
-10
16
16
50
424
0
0
0
t
5
4000
Max
10
32
1
1
t
6
t
3
Unit
ms
ms
ms
ms
ms
ms
µs
t
1
Comments
PWRBTN# is an input and must
be powered by V
If PWRBTN# max is exceeded,
ONCTL# will go inactive.
System determines when V
and V
is no maximum constraint.
POR# must not glitch during
active time.
t
7
IO
are applied, hence there
SB
.
Revision 3.0
CORE