MCP4725 datasheet(23/42 Pages) MICROCHIP

tên linh kiện	MCP4725

Giải thích chi tiết về linh kiện	12-Bit Digital-to-Analog Converter with EEPROM Memory in SOT-23-6

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DS22039C-page 23

MCP4725

7.5.5

ACKNOWLEDGE

Each receiving device, when addressed, is obliged to

generate an acknowledge after the reception of each

byte. The master device must generate an extra clock

pulse which is associated with this acknowledge bit.

The device that acknowledges, has to pull down the

SDA line during the acknowledge clock pulse in such a

way that the SDA line is stable LOW during the HIGH

period of the acknowledge related clock pulse. Of

course, setup and hold times must be taken into

account. During reads, a master must send an end of

data to the slave by not generating an acknowledge bit

on the last byte that has been clocked out of the slave.

In this case, the slave (MCP4725) will leave the data

line HIGH to enable the master to generate the STOP

condition.

FIGURE 7-3:

Data Transfer Sequence On The Serial Bus.

SCL

SDA

(A)

(B)

(D)

(A)

(C)

START

CONDITION

ADDRESS OR

ACKNOWLEDGE

VALID

DATA

ALLOWED

TO CHANGE

STOP

CONDITION

MCP4725 bảng dữ liệu(PDF) 23 Page - Microchip Technology