MAX7310 查看數據表（PDF） - Maxim Integrated

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MAX7310

2-Wire-Interfaced 8-Bit I/O Port Expander with Reset

Maxim Integrated 

2-Wire-Interfaced 8-Bit I/O Port Expander

with Reset

SCL

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SLAVE ADDRESS

COMMAND BYTE

SDA S 0 A5 A4 A3 A2 A1 A0 0 A 0 0 0 0 0 0 0 1 A

DATA TO PORT

DATA 1

START CONDITION

WRITE TO

PORT

R/W ACKNOWLEDGE

FROM SLAVE

ACKNOWLEDGE

FROM SLAVE

AP

ACKNOWLEDGE

FROM SLAVE

DATA OUT

FROM PORT

DATA 1 VALID

tPV

Figure 9. Write to Output Port Register Through Write-Byte Protocol

SDA

WRITE FROM

PORT

SLAVE ADDRESS

S1 0 A5 A4 A3 A2 A1 A0 1 A

DATA FROM PORT

DATA 1

START CONDITION

R/W ACKNOWLEDGE

FROM SLAVE

DATA FROM PORT

A

DATA 4

NA P

ACKNOWLEDGE

FROM MASTER

NO ACKNOWLEDGE STOP

FROM MASTER CONDITION

DATA INTO

PORT

DATA 2

DATA 3

tPH

tPS

NOTE 1: THIS FIGURE ASSUMES THE COMMAND HAS PREVIOUSLY BEEN PROGRAMMED WITH 0x00.

NOTE 2: TRANSFER OF DATA CAN BE STOPPED AT ANY MOMENT BY A STOP CONDITION. WHEN THIS OCCURS,

DATA PRESENT AT THE LAST ACKNOWLEDGED PHASE IS VALID (OUTPUT MODE). INPUT DATA IS LOST.

Figure 10. Read Input Port Register Through Receive-Byte Protocol

DATA 4

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