AK6416AM 데이터 시트보기 (PDF) - Asahi Kasei Microdevices

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AK6416AM

16Kbit Serial CMOS EEPROM

Asahi Kasei Microdevices 

ASAHI KASEI

[AK6416A]

Functional Description

The AK6416A has 4 instructions such as READ, WRITE, WREN (write enable) and WRDS (write disable).

Each instruction is organized by op-code block (8bits), address block (8bits) and data (8bits Õ 2). When input

level of SK pin is high level and input level of chip select (CS) pin is changed from high level to low level,

AK6416A can receive the instructions.

When the instructions are executed consecutively, the CS pin should be brought to high level for a minimum of

250ns(Tcs) between consecutive instruction cycle.

Instruction Set For 6416A

Instruction

Op-Code

Address

Data

WRITE

1 0 1 0 0 1 A9 A8

A7 A6 A5 A4 A3 A2 A1 A0 D15 -D0

READ

1 0 1 0 1 0 A9 A8

A7 A6 A5 A4 A3 A2 A1 A0 D15 -D0

WREN

10100011

ÕýýýÕýýýÕýýýÕýýýÕýýýÕýýýÕýýýÕ

WRDS

10100000

ÕýýýÕýýýÕýýýÕýýýÕýýýÕýýýÕýýýÕ

( WRAL )

10101111

ÕýýýÕýýýÕýýýÕýýýÕýýýÕýýýÕýýýÕ D15 -D0

Õ:don't care

(Note) The WRAL instruction is used for factory function test only. User can't use this instruction .

Write

The write instruction is followed by 16 bits of data to be written into the specified address. After the 32nd

rising edge of SK to read D0 in, the AK6416A will be put into the automatic write time-out period. During the

automatic write time-out period (Busy status)and while entering write instruction, the RESET pin should be low

level. If the RESET pin is set to high level during the automatic write time-out period, the AK6416A stops

execution of internal programming and the device returns to ready status. In this case the word data of the

specified address will be incomplete. When inputting the new instructoin after RESET, the CS pin should be

set to high level. When inputting the new instruction after RESET, the CS pin should be set to high level.

When the RESET pin is kept at high level, the write is not executed. This becomes write protection function.

The CS pin need not be high level during automatic write time-out period (BUSY status).

DAS02E-00

WRITE

-5-

1999/05

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