Cirrus-logic CS4953xx Manual do Utilizador descarregar pdf (Página 38)

I2C Port

CS4953xx Hardware User’s Manual

Figure 3-5. Data Byte with ACK and NACK

After an ACK or NACK from the master or slave, the slave must leave the SCP1_SDA line high so the

master can then generate either another Start condition as shown in Figure 3-6 to start a new transfer or a

Stop condition as shown in Figure 3-7 to abort the transfer.

Figure 3-6. Repeated Start Condition with ACK and NACK

Start

CP1_CLK

CP1_SDA A[6] A[5] A[4] A[3] A[2] A[1] A[0] R/W

ACK

Data Byte

ACK

M S M SWrite

M S S MRead

Start

CP1_CLK

CP1_SDA A[6] A[5] A[4] A[3] A[2] A[1] A[0] R/W

ACK

Data Byte

NACK

M S M SWrite

M S S MRead

M = Master Drives SDA

S = Slave Drives SDA

SCP1_CLK

SCP1_SDA

Data Byte

NACK

Start

A[6] A[5] A[4] A[3] A[2] A[1] A[0] R/W

ACK

M S M S

rite

S M M S

ead

M = Master Drives SDA

S = Slave Drives SDA

SCP1_CLK

SCP1_SDA

Data Byte

ACK

Start

A[6] A[5] A[4] A[3] A[2] A[1] A[0] R/W

ACK

M S M S

rite

S M M S

ead

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 117 118

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