M28R400CTB120ZB1T Ver la hoja de datos (PDF) - STMicroelectronics

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M28R400CTB120ZB1T

4 Mbit (256Kb x16, Boot Block) 1.8V Supply Flash Memory

STMicroelectronics 

M28R400CT, M28R400CB

Figure 11. Power-Up and Reset AC Waveforms

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

tPHWL

tPHEL

tPHGL

During

Reset High to Write Enable Low, Chip Enable Low, Program and Min

Output Enable Low

Erase

others

Min

tPLPH(1,2) Reset Low to Reset High

Min

tVDHPH(3) Supply Voltages High to Reset High

Min

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.

M28R400C

90

120

Unit

50

50 µs

30

30 ns

100 100 ns

50

50 µs

28/50

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