pcf8814 NXP Semiconductors, pcf8814 Datasheet - Page 50

• Manufacturer Part Number: pcf8814
• Description: Pcf8814 65 X 96 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
16 APPLICATION INFORMATION
16.1
Semiconductors are light sensitive. Exposure to light
sources can cause malfunction of the IC. In the application
it is therefore required to protect the IC from light. The
protection must be done on all sides of the IC, i.e. front,
rear and all edges.
16.2
The pinning of the PCF8814 has an optimal design for
single-plane wiring e.g. for chip-on-glass display modules.
Display size: 65 x 96 pixels.
16.3
In the following applications, the required minimum values
for the external capacitors are:
16.5
2003 Mar 13
handbook, full pagewidth
C
values may give better display performance)
C
Higher values can be used for the supply capacitors.
65
VLCD
VDD,
Protection from light
Chip-on-glass application
Application capacitor values
Application examples
C
= 100 nF (depending on application higher
96 pixels matrix LCD driver
VDD1,
C
Fig.47 Application example using the internal charge pump and a single V
VDD2
= 1 F
33
I/O
.
V DD
DISPLAY 65
C VDD
PCF8814
50
96
16.4
If an external V
removed at any time. Power saving should always be
achieved using the Power-down mode. With an internal
V
necessary by using the following procedure:
1. Discharge the V
2. Follow this action with a short delay (the delay period
3. Put the PCF8814 into Power-down mode and remove
96 pixels
V SS
LCD
V
aberrations). The discharge time depends on the size
of C
fastest way to reduce the voltage is:
a) Switch off the charge pump by setting bit PC of the
b) Switch off the display by setting bits DON and DAL
is application-dependent and must be determined by
experimentation).
V
display-off, the time required to discharge C
be considerably longer).
C VLCD
supply, V
DD1
DD1
Supply voltage V
Power control instruction to logic 0.
of the Display mode to logic 0.
VLCD
(if Power-down mode is entered without going via
(this avoids the occurrence of display
and how the PCF8814 is shut down; the
DD1
LCD
should only be removed if entirely
supply is used, V
LCD
MBL545
voltage prior to disconnecting
DD1
32
DD
source.
Objective specification
DD1
should not be
PCF8814
VLCD
may