Datasheet > A29512-55

A29512-55

更新时间： 2022-11-29 02:52:53

品牌	Logo	应用领域
联笙电子 - AMICC		/
页数	文件大小	规格书
31页	294K
描述
64K X 8 Bit CMOS 5.0 Volt-only, Uniform Sector Flash Memory

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数据手册

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A29512-55 数据手册

A29512 Series

Autoselect Command Sequence

The autoselect command sequence allows the host system

to access the manufacturer and devices codes, and

determine whether or not a sector is protected. The

Command Definitions table shows the address and data

requirements. This method is an alternative to that shown in

the Autoselect Codes (High Voltage Method) table, which is

intended for PROM programmers and requires VID on

address bit A9.

The autoselect command sequence is initiated by writing two

unlock cycles, followed by the autoselect command. The

device then enters the autoselect mode, and the system may

read at any address any number of times, without initiating

another command sequence.

START

Write Program

Command

Sequence

Data Poll

from System

Embedded

Program

algorithm in

progress

Byte Program Command Sequence

Programming is a four-bus-cycle operation. The program

command sequence is initiated by writing two unlock write

cycles, followed by the program set-up command. The

program address and data are written next, which in turn

initiate the Embedded Program algorithm. The system is not

required to provide further controls or timings. The device

automatically provides internally generated program pulses

and verify the programmed cell margin. The Command

Definitions table shows the address and data requirements

for the byte program command sequence.

When the Embedded Program algorithm is complete, the

device then returns to reading array data and addresses are

no longer latched. The system can determine the status of

the program operation by using I/O7 or I/O6. See "Write

Operation Status" for information on these status bits.

Verify Data ?

Yes

Last Address ?

Yes

Increment Address

Any commands written to the device during the Embedded

Program Algorithm are ignored. Programming is allowed in

any sequence and across sector boundaries. A bit cannot be

programmed from a "0" back to a "1 ". Attempting to do so

may halt the operation and set I/O5 to "1", or cause the

Programming

Completed

Note : See the appropriate Command Definitions table for

program command sequence.

Polling algorithm to indicate the operation was

Data

successful. However, a succeeding read will show that the

data is still "0". Only erase operations can convert a "0" to a

"1".

Figure 1. Program Operation

PRELIMINARY

(November, 2001, Version 0.0)

AMIC Technology, Inc.

1...6 7 8910 11 12...31

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