PCA9665D datasheet(38/91 Pages) PHILIPS

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Table 36.

Master Receiver Buffered mode (MODE = 1)

Status

code

(I2CSTA)

Status of the

I2C-bus and the

PCA9665

Application software response

Next action taken by the PCA9665

To/from I2CDAT

To/from I2CCOUNT

To I2CCON

BC[6:0]

STA STO SI

MODE

08h

A START condition

has been transmitted

Load SLA+R

Total number of bytes

to be received

SLA+R will be transmitted.

If ACK bit received, BC[6:0] data bytes will be

received, ACK bit will be returned for all of

them.

Total number of bytes

to be received

SLA+R will be transmitted.

If ACK bit received, BC[6:0] data bytes will be

received, ACK bit will be returned for all of

them, except for the last one where NACK bit

will be returned.

10h

A repeated START

condition has been

transmitted

Load SLA+R or

Total number of bytes

to be received

SLA+R will be transmitted.

If ACK bit received, BC[6:0] data bytes will be

received, ACK bit will be returned for all of

them.

Total number of bytes

to be received

SLA+R will be transmitted.

If ACK bit received, BC[6:0] data bytes will be

received, ACK bit will be returned for all of

them, except for the last one where NACK bit

will be returned.

Load SLA+W and

the data bytes

Total number of bytes

to be transmitted

(= SLA+W + number

of data bytes)

SLA+W will be transmitted;

PCA9665 will be switched to Master

Transmitter Buffered mode.

38h

Arbitration lost in

NACK bit

No I2CDAT action

I2C-bus will be released;

PCA9665 will enter slave mode.

No I2CDAT action X

A START condition will be transmitted when

the bus becomes free.

48h

SLA+R has been

transmitted;

NACK has been

received

No I2CDAT action

Repeated START condition will be

transmitted.

No I2CDAT action

STOP condition will be transmitted;

STO ﬂag will be reset.

No I2CDAT action X

STOP condition followed by a START

condition will be transmitted;

STO ﬂag will be reset.

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