PCF8576 Philips Semiconductors, PCF8576 Datasheet - Page 26

• Manufacturer Part Number: PCF8576
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1998 Feb 06
handbook, full pagewidth
Universal LCD driver for low multiplex
rates
Excessive capacitive coupling between SCL or CLK and SYNC may cause erroneous synchronization. If this proves to be a problem, the capacitance
of the SYNC line should be increased (e.g. by an external capacitor between SYNC and V
be countered by an external pull-up resistor.
Fig.19 Synchronization of the cascade for the various PCF8576 drive modes.
(1/2 bias)
(1/3 bias)
BP0
SYNC
SYNC
BP2
SYNC
BP3
SYNC
BP1
BP1
(b) 1 : 2 multiplex drive mode.
(c) 1 : 3 multiplex drive mode.
(d) 1 : 4 multiplex drive mode.
(a) static drive mode.
T
frame
=
26
f frame
1
DD
). Degradation of the positive edge of the SYNC pulse may
MBE535
Product specification
PCF8576