JS28F256P30T85 datasheet(66/102 Pages) INTEL

66 / 102 page

1-Gbit P30 Family

April 2005

Intel StrataFlash® Embedded Memory (P30)

Datasheet

Order Number: 306666, Revision: 001

When a programming operation is executing, issuing the Program Suspend command requests the

WSM to suspend the programming algorithm at predetermined points. The device continues to

output Status Register data after the Program Suspend command is issued. Programming is

suspended when Status Register bits SR[7,2] are set. Suspend latency is specified in Section 7.5,

“Program and Erase Characteristics” on page 45.

To read data from the device, the Read Array command must be issued. Read Array, Read Status

program suspend.

During a program suspend, deasserting CE# places the device in standby, reducing active current.

VPP must remain at its programming level, and WP# must remain unchanged while in program

suspend. If RST# is asserted, the device is reset.

11.5

Program Resume

The Resume command instructs the device to continue programming, and automatically clears

Status Register bits SR[7,2]. This command can be written to any address. If error bits are set, the

Status Register should be cleared before issuing the next instruction. RST# must remain deasserted

(see Figure 41, “Program Suspend/Resume Flowchart” on page 86).

11.6

Program Protection

When VPP = VIL, absolute hardware write protection is provided for all device blocks. If VPP is at

or below VPPLK, programming operations halt and SR[3] is set indicating a VPP-level error. Block

lock registers are not affected by the voltage level on VPP; they may still be programmed and read,

even if VPP is less than VPPLK.

Figure 31.

Example VPP Supply Connections

• Factory Programming with V

PP = VPPH

• Complete write/Erase Protection when V

PP ≤ VPPLK

VCC

VPP

VCC

VPP

• Low Voltage and Factory Programming

• Low-voltage Programming only

• Logic Control of Device Protection

VCC

VPP

• Low Voltage Programming Only

• Full Device Protection Unavailable

VCC

VPP

≤ 10K Ω

PROT #

PP=VPPH

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