M29F400B datasheet(20/34 Pages) STMICROELECTRONICS

No de pièce	M29F400B

Description	4 Mbit 512Kb x8 or 256Kb x16, Boot Block Single Supply Flash Memory

PDF	34 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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20 / 34 page

AI01869C

A0-A17/

A–1

DQ0-DQ7/

DQ8-DQ15

VALID

VCC

tVCHEL

tWHEH

tWHWL

tELWL

tAVWL

tWHGL

tWLAX

tWHDX

tAVAV

tDVWH

tWLWH

tGHWL

tWHRL

Figure 7. Write AC Waveforms, W Controlled

Note: Address are latched on the falling edge of W, Data is latched on the rising edge of W.

POWER SUPPLY

Power Up

The memory Command Interface is reset on power

up to Read Array. Either E or W must be tied to VIH

during Power Up to allow maximum security and

the possibility to write a command on the first rising

edge of E and W. Any write cycle initiation is

blocked when Vcc is below VLKO.

Supply Rails

Normal precautions must be taken for supply volt-

age decoupling; each device in a system should

have the VCC rail decoupled with a 0.1

µF capacitor

close to the VCC and VSS pins. The PCB trace

widths should be sufficient to carry the VCC pro-

gram and erase currents required.

20/34

M29F400T, M29F400B

M29F400B Fiches technique(PDF) 20 Page - STMicroelectronics