1-Gbit P30 Family
8.0
Power and Reset Specifications
8.1
Power Up and Down
Power supply sequencing is not required if VCC, VCCQ, and VPP are connected together; If
VCCQ and/or VPP are not connected to the VCC supply, then VCC should attain VCCMIN before
applying VCCQ and VPP. Device inputs should not be driven before supply voltage equals VCCMIN
.
Power supply transitions should only occur when RST# is low. This protects the device from
accidental programming or erasure during power transitions.
8.2
Reset Specifications
Asserting RST# during a system reset is important with automated program/erase devices because
systems typically expect to read from flash memory when coming out of reset. If a CPU reset
occurs without a flash memory reset, proper CPU initialization may not occur. This is because the
flash memory may be providing status information, instead of array data as expected. Connect
RST# to the same active low reset signal used for CPU initialization.
Also, because the device is disabled when RST# is asserted, it ignores its control inputs during
power-up/down. Invalid bus conditions are masked, providing a level of memory protection.
Num Symbol
Parameter
RST# pulse width low
Min
Max
Unit
Notes
P1
P2
P3
t
t
t
100
-
ns
1,2,3,4
1,3,4,7
1,3,4,7
1,4,5,6
PLPH
RST# low to device reset during erase
RST# low to device reset during program
-
-
25
25
-
PLRH
µs
V
Power valid to RST# de-assertion (high)
60
VCCPH
CC
Notes:
1.
2.
3.
4.
5.
6.
These specifications are valid for all device versions (packages and speeds).
The device may reset if t is < t MIN, but this is not guaranteed.
Not applicable if RST# is tied to Vcc.
Sampled, but not 100% tested.
PLPH
PLPH
If RST# is tied to the V supply, device will not be ready until t
after V ≥ V
.
CC
VCCPH
CC
CCMIN
If RST# is tied to any supply/signal with V
voltage levels, the RST# input voltage must not exceed
CCQ
V
until V ≥ V
.
CC
CC
CCMIN
7.
Reset completes within t
if RST# is asserted while no erase or program operation is executing.
PLPH
April 2005
46
Intel StrataFlash® Embedded Memory (P30)
Order Number: 306666, Revision: 001
Datasheet
INTEL [ INTEL ]
