Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 160)

100

101

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 11-5

The slave cannot write to the I2CBUF if a transfer is in progress (I2CBUSY = 1). Therefore, the CPU should first check

the status of the I

C busy bit before writing to the I

C buffer. Any attempt to write to the I2CBUF is ignored when

I2CBUSY = 1.

Figure 11-5. I

C Slave Transmitter and Slave Receiver

BEGIN

END

(A) SLAVE TRANSMITTER

DETECT START

I2CSRI = 1

I2CBUS = 1

DETECT STOP

I2CBUS = 0

TRANSMIT

DATA

ANY MORE?

RECEIVE

SLAVE

ADDRESS

STOP?

I2CAMI = 1?

BEGIN

END

(B) SLAVE RECEIVER

DETECT START

I2CSRI = 1

I2CBUS = 1

DETECT STOP

I2CBUS = 0

RECEIVE

DATA

ANY MORE?

RECEIVE

SLAVE

ADDRESS

STOP?

I2CAMI = 1?

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