M28W640EC-ZB 데이터 시트보기 (PDF) - STMicroelectronics

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M28W640EC-ZB

64 Mbit (4Mb x16, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

Figure 12. Power-Up and Reset AC Waveforms

M28W640ECT, M28W640ECB

W, E, G

RP

VDD, VDDQ

tPHWL

tPHEL

tPHGL

tVDHPH

Power-Up

tPHWL

tPHEL

tPHGL

tPLPH

Reset

AI03537b

Table 19. Power-Up and Reset AC Characteristics

Symbol

Parameter

Test Condition

M28W640EC

70

85

90

tPHWL

tPHEL

tPHGL

During Program

Reset High to Write Enable Low, Chip

and Erase

Min

Enable Low, Output Enable Low

others

Min

50

30

50

30

50

30

tPLPH(1,2) Reset Low to Reset High

Min 100 100 100

tVDHPH(3) Supply Voltages High to Reset High

Min 50

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

10

50 µs

30 ns

100 ns

50 µs

29/55

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