LH28F800BJHE-PBTL90 View Datasheet(PDF) - Sharp Electronics

Part Name

Description

Manufacturer

LH28F800BJHE-PBTL90

8M (x8/x16) Flash Memory

Sharp Electronics 

i

A-1 RECOMMENDED OPERATING CONDITIONS

A-1.1 At Device Power-Up

AC timing illustrated in Figure A-1 is recommended for the supply voltages and the control signals at device power-up.

If the timing in the figure is ignored, the device may not operate correctly.

VCC(min)

VCC

GND

VIH

RP# (P)

(RST#) VIL

VCCWH1/2

(VPPH1/2)

VCCW *2 (V)

(VPP)

GND

VIH

ADDRESS (A)

VIL

VIH

CE# (E)

VIL

VIH

WE# (W)

VIL

VIH

OE# (G)

VIL

VIH

WP# (S)

VIL

VOH

DATA (D/Q)

VOL

tVR

t2VPH *1

tR

tR or tF

High Z

tPHQV

tAVQV

Valid

Address

tF

tELQV

tR or tF

tR

tF tGLQV

tR

Valid

Output

*1 t5VPH for the device in 5V operations.

*2 To prevent the unwanted writes, system designers should consider the VCCW (VPP) switch, which connects VCCW (VPP)

to GND during read operations and VCCWH1/2 (VPPH1/2) during write or erase operations.

See the application note AP-007-SW-E for details.

Figure A-1. AC Timing at Device Power-Up

For the AC specifications tVR, tR, tF in the figure, refer to the next page. See the “ELECTRICAL SPECIFICATIONS“

described in specifications for the supply voltage range, the operating temperature and the AC specifications not shown in

the next page.

Rev. 1.10

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