M28W640CT Datasheet, PDF (29/54 Pages) STMicroelectronics – 64 Mbit 4Mb x16, Boot Block 3V Supply Flash Memory

Figure 12. Power-Up and Reset AC Waveforms
M28W640CT, M28W640CB
W, E, G
RP
VDD, VDDQ
tPHWL
tPHEL
tPHGL
tVDHPH
Power-Up
tPHWL
tPHEL
tPHGL
tPLPH
Reset
AI03537b
Table 18. Power-Up and Reset AC Characteristics
Symbol
Parameter
Test Condition
M28W640C
80
90
t_PHWL
t_PHEL
t_PHGL
Reset High to Write Enable Low, Chip
Enable Low, Output Enable Low
During Program
and Erase
Min
50
others
Min
30
50
30
t_PLPH(1,2) Reset Low to Reset High
Min
100
100
t_VDHPH(3) Supply Voltages High to Reset High
Min
50
50
Note: 1. The device Reset is possible but not guaranteed if tPLPH < 100ns.
2. Sampled only, not 100% tested.
3. It is important to assert RP in order to allow proper CPU initialization during power up or reset.
Unit
µs
ns
ns
µs
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