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PCF8584

I2C-bus controller

Philips Electronics 

Philips Semiconductors

I2C-bus controller

Product specification

PCF8584

ndbook, full pagewidth

START

PCF8584 configured as

master transmitter

I2C-bus write routine

(master transmitter mode

excluding final STOP)

send byte 45H

A0 = HIGH

PCF8584 configured as

master receiver

send byte 'slave address'

A0 = LOW

I2C-bus read routine (master receiver mode)

Load 45H into the S1 register; PCF8584

generates the repeated 'START condition' only.

The current contents of register S0 is NOT

clocked out onto the I2C-bus.

The next byte sent to register S0 should be the

'slave address' + read bit.

Load 'slave address' into the S0 register. Once

loaded, it is automatically clocked out over the I2C-bus.

'Slave address' = slave address (7 bits) + R/W bit set '1'.

END

MBE712

Fig.8 Master transmitter followed by repeated START and becoming master receiver.

1997 Oct 21

18

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