S29GL128S SPANSION [SPANSION], S29GL128S Datasheet - Page 78

• Manufacturer Part Number: S29GL128S
• Manufacturer: SPANSION [SPANSION]

10.3
78
10.3.1
Power-On Reset (POR) and Warm Reset
Power-On (Cold) Reset (POR)
Normal precautions must be taken for supply decoupling to stabilize the V
device in a system should have the V
the package connections (this capacitor is generally on the order of 0.1 µF).
Notes:
1. Not 100% tested.
2. Timing measured from V
3. RESET# Low is optional during POR. If RESET is asserted during POR, the later of t
4. V
5. V
6. Sum of t
During the rise of power supplies the V
voltage. V
The Cold Reset Embedded Algorithm requires a relatively long, hundreds of µs, period (t
EAC algorithms and default state from non-volatile memory. During the Cold Reset period all control signals
including CE# and RESET# are ignored. If CE# is Low during t
POR current during t
from High to Low after t
RESET# is Low during t
state. If RESET# is High at the end of t
When power is first applied, with supply voltage below V
internal device configuration and warm reset activities are initiated. CE# is ignored for the duration of the POR
operation (t
POR it must satisfy the Hardware Reset parameters t
completed at the later of t
During Cold Reset the device will draw I
Low. If RESET# remains Low after t
t
RH
CC
CC
Parameter
before CE# goes Low.
≥
and V
t
t
t
t
VIOS
VCS
RPH
t
t
CEH
V
RP
RH
IO
RP
IH
- 200 mV during power-up.
IO
RESET#
VCS
and t
also must remain less than or equal to the V
ramp rate can be non-linear.
VCC
CE#
VIO
RH
or t
must be equal to or greater than t
V
V
RESET# Low to CE# Low
RESET# Pulse Width
Time between RESET# (High) and CE# (low)
CE# Pulse Width High
VIOS
CC
IO
VCS
Setup Time to first access (Notes 1, 2)
Setup Time to first access (Notes 1, 2)
CC
). RESET# Low during this POR period is optional. If RESET# is driven Low during
VCS
VCS
reaching V
but the level of CE# will not affect the Cold Reset EA. CE# or OE# must transition
VCS
for a valid read or write operation. RESET# may be High or Low during t
it may remain Low at the end of t
or t
VIOS
Table 10.2 Power ON and Reset Parameters
CC
VIOS
, or t
GL-S MirrorBit
Description
minimum and V
CC
VCS
or t
Figure 10.3 Power-Up Diagram
IO
VCS
CC7
and V
is satisfied, t
supply voltage must remain less than or equal to the V
RPH
the device will go to the Standby state.
RPH.
current.
D a t a
.
IO
tVCS
IO
®
power supplies decoupled by a suitable capacitor close to
reaching V
tVIOS
Family
RPH
RP
is measured from the end of t
S h e e t
RST
and t
IO
IO
supply.
minimum to V
then rising to reach operating range minimum,
VCS
RPH
VCS
. In which case the Reset operations will be
to hold the device in the Hardware Reset
tCEH
tRH
the device may draw higher than normal
S29GL_128S_01GS_00_06 March 16, 2012
RPH
Limit
Min
Min
Min
Min
Min
Min
IH
, t
on Reset and V
VIOS
CC
, or t
VIOS
and V
VCS
, or t
IO
will determine when CE# may go
VCS
IL
power supplies. Each
Value
on CE#.
300
300
200
. RESET must also be High
35
50
20
VCS
) to load all of the
CC
supply
VCS
Unit
µs
µs
µs
ns
ns
ns
. If