PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 3

• Manufacturer Part Number: PCF8820U
• Description: 67 x 101 Grey-scale/ECB colour dot matrix LCD driver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1
4
2000 Dec 07
PCF8820U
Single-chip LCD controller and driver for grey-scale/
Electrically Controlled Birefringence (ECB) colour
4 grey levels/colours (2-bit) definable from 64 levels
67 row and 101 column outputs
Display data RAM 67
addressing
Partial screen mode with reduced current consumption
(8 rows at top or bottom of display)
On-chip:
– Generation of LCD supply voltage (V
– Configurable voltage multiplier factor of
– Selectable linear temperature compensation
– Generation of intermediate LCD bias voltages
– Oscillator requires no external components; external
Temperature read-out
Fast mode I
Frame frequency calibration via software
Software selectable bias configuration
Compatible with 4-bit, 8-bit or 16-bit microcontrollers
Multiplex rates of 1 : 67 or 1 : 8
Logic supply voltage range from 2.5 to 5.5 V
(V
High voltage generator supply voltage range from
2.7 to 5.5 V (V
Bias voltage generator supply voltage range
(V
– From 7 to 14.5 V at a multiplex rate of 1 : 67
– From 4.5 to 14.5 V in partial screen mode at a
Low power consumption, suitable for battery operated
systems
Slim chip layout, suitable for chip-on-glass applications
67 101 Grey-scale/ECB colour dot matrix
LCD driver
TYPE NUMBER
FEATURES
ORDERING INFORMATION
DD1
LCDIN
external supply also possible
8, 7, 6, 5, 4, 3 or 2; direct drive also possible
of V
clock also possible.
multiplex rate of 1 : 8.
to V
LCDOUT
to V
SS1
2
SS1
C-bus interface (400 kbits/s)
)
DD2
):
to V
SS1
101
NAME
and V
2-bit with linear RAM
DD3
chip with bumps in tray
to V
LCDOUT
SS2
)
);
3
2
3
The PCF8820 is a low power CMOS LCD row/column
driver, designed to drive grey-scale/ ECB colour dot matrix
graphic displays at a multiplex rate of 1 : 67. In the partial
screen mode, only 8 rows are driven at a multiplex rate of
1 : 8.
This chip provides all the necessary display functions,
including on-chip generation of the LCD supply voltage
and LCD bias voltages. Consequently, fewer external
components are required and the power consumption is
low.
The PCF8820 interfaces with most microcontrollers and
communicates via a two-line bidirectional bus (I
All inputs are CMOS compatible.
Remark: the waveform generation for ECB colour is
identical to that used for grey-scale.
DESCRIPTION
Software selectable top and bottom row swap for
adapting driver to different glass-layouts
CMOS compatible inputs
Manufactured in silicon gate CMOS process.
Mobile telecommunication systems
Battery powered equipment
Point of sale terminals
Instrumentation
Automotive information systems.
APPLICATIONS
GENERAL DESCRIPTION
PACKAGE
Product specification
PCF8820
VERSION
2
C-bus).