1998 Feb 06

26

Philips Semiconductors

Product specification

Universal LCD driver for low multiplex

rates

PCF8576

Fig.19 Synchronization of the cascade for the various PCF8576 drive modes.

Excessive capacitive coupling between SCL or CLK and SYNC may cause erroneous synchronization. If this proves to be a problem, the capacitance

be countered by an external pull-up resistor.

handbook, full pagewidth

T=

frame

f

frame

1

BP0

SYNC

BP1

(1/2 bias)

SYNC

BP2

(a) static drive mode.

(b) 1 : 2 multiplex drive mode.

(c) 1 : 3 multiplex drive mode.

(d) 1 : 4 multiplex drive mode.

BP3

SYNC

SYNC

BP1

(1/3 bias)

MBE535