cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 551

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
Electrical Specifications
6.4
The voltages applied to the CS5535 are subject to the
requirements listed below as well as the requirements of
Table 6-3 "Recommended Operating Conditions" on page
526. Reference values “minimum” and “maximum” below
should be taken from Table 6-3.
Note that the information below is provided for complete-
ness. Since the specified margins are very wide, the typical
power supply implementation meets them without problem.
If these requirements are not observed, the RTC circuit
and/or the LVD circuit may not operate correctly.
1)
2)
V
meet their respective minimum values within 100 ms of
each other.
From zero volts, V
tonically and reach 90% of their respective minimum
values no sooner that 10 µs and no later than 1 sec-
ond.
CORE
POWER SUPPLY SEQUENCE REQUIREMENTS
and V
IO
may come up in any order but must
CORE
and V
IO
(Continued)
must ramp up mono-
551
3)
4)
5)
6)
7)
8)
From their respective minimum values, V
must ramp down to within 0.4 volts of ground no
sooner than 100 ms and no later than 5 seconds.
Same as requirement 1, but for V
V
Same
(VDD_VSB) and V
Same as requirement 3 but for V
V
The absolute value of the delta between V
V
The absolute value of the delta between V
V
IO_VSB
IO_VSB
CORE_VSB
IO_VSB
.
.
as
must not exceed 0.25 volts.
must not exceed 0.25 volts.
requirement
IO_VSB
.
2,
but
for
CORE_VSB
CORE_VSB
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CORE
V
CORE
CORE_VSB
and V
IO
and
and
and
and
IO