28F128 datasheet(53/58 Pages) INTEL

53 / 58 page

28F128J3A, 28F640J3A, 28F320J3A

Preliminary

6.6

AC Characteristics— Write Operations(1,2)

NOTES:

CEX low is defined as the first edge of CE0, CE1, or CE2 that enables the device. CEX high is defined at the first edge of CE0,

CE1, or CE2 that disables the device (see Table 2).

1. Read timing characteristics during block erase, program, and lock-bit configuration operations are the same

as during read-only operations. Refer to AC Characteristics–Read-Only Operations.

2. A write operation can be initiated and terminated with either CEX or WE#.

3. Sampled, not 100% tested.

4. Write pulse width (tWP) is defined from CEX or WE# going low (whichever goes low first) to CEX or WE# going

high (whichever goes high first). Hence, tWP = tWLWH = tELEH = tWLEH = tELWH. If CEX is driven low 10 ns

before WE# going low, WE# pulse width requirement decreases to tWP - 10 ns.

5. Refer to Table 4 for valid AIN and DIN for block erase, program, or lock-bit configuration.

6. Write pulse width high (tWPH) is defined from CEX or WE# going high (whichever goes high first) to CEX or

WE# going low (whichever goes low first). Hence, tWPH = tWHWL = tEHEL = tWHEL = tEHWL.

7. For array access, tAVQV is required in addition to tWHGL for any accesses after a write.

8. STS timings are based on STS configured in its RY/BY# default mode.

9. VPEN should be held at VPENH until determination of block erase, program, or lock-bit configuration success

(SR.1/3/4/5 = 0).

Versions

Valid for All

Speeds

Unit

Symbol

Parameter

Notes

Min

Max

tPHWL (tPHEL)

RP# High Recovery to WE# (CEX) Going Low

µs

tELWL (tWLEL)CEX (WE#) Low to WE# (CEX) Going Low

tWP

Write Pulse Width

tDVWH (tDVEH)

Data Setup to WE# (CEX) Going High

tAVWH (tAVEH)

Address Setup to WE# (CEX) Going High

tWHEH (tEHWH)CEX (WE#) Hold from WE# (CEX) High

tWHDX (tEHDX)

Data Hold from WE# (CEX) High

tWHAX (tEHAX)

Address Hold from WE# (CEX) High

tWPH

Write Pulse Width High

W11

tVPWH (tVPEH)VPEN Setup to WE# (CEX) Going High

W12

tWHGL (tEHGL)

Write Recovery before Read

W13

tWHRL (tEHRL)WE# (CEX) High to STS Going Low

500

W15

tQVVL

VPEN Hold from Valid SRD, STS Going High

3,8,9

28F128 Datasheet(PDF) 53 Page - Intel Corporation

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