NM34C02 데이터 시트보기 (PDF) - Fairchild Semiconductor

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NM34C02

2K-Bit Standard 2-Wire Bus Interface

Fairchild Semiconductor 

Write Cycle Timing

SCL

SDA

8th BIT

WORD n

ACK

STOP

CONDITION

tWR

START

CONDITION

DS012821-6

SCL

SDA

DATA STABLE

DATA

CHANGE

Data Validity (Figure 1).

SCL

SDA

START

CONDITION

STOP

CONDITION

DS012821-7

Start and Stop Definition (Figure 2).

DS012821-8

SCL FROM

MASTER

1

8

9

DATA OUTPUT

FROM

TRANSMITTER

DATA OUTPUT

FROM

RECEIVER

START

ACKNOWLEDGE

Acknowledge Responses from Receiver (Figure 3).

DS012821-9

Device Addressing

Following a start condition the master must output the address of

the slave it is accessing. The most significant four bits of the slave

address are those of the device type identifier (see Figure 4). This

is fixed as 1010 for all EEPROM devices.

All IIC EEPROMs use an internal protocol that defines a PAGE

BLOCK size of 2K bits (for Byte addresses 00 through FF).

NM34C02 Rev. D.2

7

www.fairchildsemi.com

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