PCA9698

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© NXP B.V. 2010. All rights reserved.

Product data sheet

Rev. 3 — 3 August 2010

30 of 48

NXP Semiconductors

PCA9698

Only slave devices with bit IOAC = 1 answer to the GPIO All Call transaction.

Output Port register programming becomes effective at the STOP command if OCH = 0, at each acknowledge if OCH = 1.

Configuration, Polarity Inversion, and Mask interrupt registers become effective at the acknowledge.

Less than 5 bytes can be programmed by using the same scheme.

‘D5 D4 D3 D2 D1 D0’ refers to the first register to be programmed.

If more than 5 bytes are written, previous data are overwritten (the sixth Configuration register will roll over to the first

addressed Configuration register, the sixth Polarity Inversion register will roll over to the first addressed Polarity Inversion

register, the sixth Mask interrupt register will roll over to the first addressed Mask interrupt register).

Fig 23. GPIO All Call write to the Output Port, I/O Configuration, Polarity Inversion, or Mask interrupt registers

002aab952

S

1

1

0

1

1

1

0

0 A

GPIO All Call address

R/W

START condition

command register

AI = 1

A

acknowledge

from slave(s)

DATA BANK 0 A

acknowledge

from slave(s)

DATA BANK 1

acknowledge

from slave

A

acknowledge

from slave(s)

DATA BANK 2 A

acknowledge

from slave(s)

DATA BANK 3 A

acknowledge

from slave(s)

DATA BANK 4

P

STOP

condition

A

SDA

1

0 D5 D4 D3 D2 D1 D0

00 1000 for Output Port register programming bank 0

01 0000 for Polarity Inversion register programming bank 0

01 1000 for Configuration register programming bank 0

acknowledge

from slave

10 0000 for Mask interrupt register programming bank 0

Only slave devices with bit 0 IOAC = 1 answer the GPIO All Call transaction.

The programming becomes effective at the acknowledge.

If more than 1 byte is written, previous data is overwritten.

Fig 24. GPIO All Call write to the Output structure configuration, All Bank Control, or Mode selection registers

002aab953

S

1

1

0

1

1

1

0

0 A

slave address

R/W

START condition

command register

AI = 'don't care'

A

acknowledge

from slave(s)

A

acknowledge

from slave(s)

acknowledge

from slave(s)

P

STOP

condition

SDA

X

01010 D1 D0

00 for Output structure configuration register programming

01 for All Bank Control register programming

10 for Mode selection register programming

DATA