PCF8578USLASH2 datasheet(20/44 Pages) PHILIPS

20 / 44 page

1998 Sep 08

Philips Semiconductors

Product speciﬁcation

LCD row/column driver for dot matrix

graphic displays

PCF8578

Fig.13 (a) Master transmits to slave receiver (WRITE mode); (b) Master reads after sending command string

(WRITE commands; READ data); (c) Master reads slave immediately after sending slave address (READ

mode).

MSA830

011110

0 A C

COMMAND

DISPLAY DATA

slave address

acknowledge by

all addressed

PCF8578s / PCF8579s

acknowledge

by A0, A1, A2 and A3

selected PCF8578s /

PCF8579s only

0 byte(s)

1 byte

update data pointers

and if necessary,

subaddress counter

(a)

MSA832

011110

0 A C

COMMAND

slave address

acknowledge by

all addressed

PCF8578s / PCF8579s

1 byte

(b)

DATA

011110

1 A

slave address

DATA

n bytes

last byte

update data pointers

and if necessary

subaddress counter

acknowledge

from master

no acknowledge

from master

at this moment master

transmitter becomes a

master receiver and

PCF8578/PCF8579 slave

receiver becomes a

slave transmitter

MSA831

011110

1 A

DATA

slave address

acknowledge by

all addressed

PCF8578s / PCF8579s

last byte

n bytes

update data pointers

and if necessary,

subaddress counter

(c)

acknowledge

from master

no acknowledge

from master

PCF8578U/2 Datasheet(PDF) 20 Page - NXP Semiconductors

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