Datasheet > A290011BT-55UF

A290011BT-55UF

更新时间： 2024-10-29 00:29:23

品牌	Logo	应用领域
联笙电子 - AMICC		/
页数	文件大小	规格书
33页	387K
描述
128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory

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A290011BT-55UF 数据手册

A29001B/A290011B Series

Sector Protection/Unprotection

The hardware sector protection feature disables both

program and erase operations in any sector. The

hardware sector unprotection feature re-enables both

program and erase operations in previously protected

sectors.

START

Sector protection/unprotection must be implemented using

programming equipment. The procedure requires a high

voltage (V^ID) on address pin A9 and the control pins.

The device is shipped with all sectors unprotected.

It is possible to determine whether a sector is protected or

unprotected. See "Autoselect Mode" for details.

RESET = VID

(Note 1)

Hardware Data Protection

Perform Erase or

The requirement of command unlocking sequence for

programming or erasing provides data protection against

inadvertent writes (refer to the Command Definitions

table). In addition, the following hardware data protection

measures prevent accidental erasure or programming,

which might otherwise be caused by spurious system level

signals during VCC power-up transitions, or from system

noise. The device is powered up to read array data to

avoid accidentally writing data to the array.

Program Operations

RESET = VIH

Write Pulse "Glitch" Protection

Noise pulses of less than 5ns (typical) on

OE CE

Temporary Sector

Unprotect

do not initiate a write cycle.

Completed (Note 2)

Logical Inhibit

Write cycles are inhibited by holding any one of

=VIL,

= VIH or

= VIH. To initiate a write cycle,

and

Notes:

must be a logical zero while

is a logical one.

1. All protected sectors unprotected.

2. All previously protected sectors are protected once again.

Power-Up Write Inhibit

= VIL and

= VIH during power up, the

WE CE

device does not accept commands on the rising edge of

. The internal state machine is automatically reset to

Figure 1. Temporary Sector Unprotect Operation

reading array data on the initial power-up.

Temporary Sector Unprotect (N/A A290011B)

This feature allows temporary unprotection of previous

protected sectors to change data in-system. The Sector

Unprotect mode is activated by setting the

pin to

RESET

V^ID. During this mode, formerly protected sectors can be

programmed or erased by selecting the sector addresses.

Once V^IDis removed from the

pin, all the

RESET

previously protected sectors are protected again. Figure 1

shows the algorithm, and the Temporary Sector Unprotect

diagram shows the timing waveforms, for this feature.

PRELIMINARY (June, 2016, Version 0.0)

AMIC Technology, Corp.

1...5 6 789 10 11...33

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与A290011BT-55UF相关器件

型号	品牌	获取价格	描述	数据表
A290011BTL-55F	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BTL-55UF	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BTV-55F	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BTV-55UF	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BU-55F	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BU-55UF	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BUL-55F	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BUL-55UF	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BUV-55F	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory
A290011BUV-55UF	AMICC	获取价格	128K X 8 Bit CMOS 5.0 Volt-only,Boot Sector Flash Memory

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