Philips Semiconductors
Product specification
67
×
101 Grey-scale/ECB colour dot matrix
LCD driver
CONTENTS
1
2
3
4
5
6
6.1
6.2
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
6.2.8
6.2.9
6.2.10
6.2.11
6.2.12
6.2.13
6.2.14
6.2.15
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
7.15
7.16
7.17
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING
Pad configuration
Pad functions
Row driver outputs
Column driver outputs
Ground supply
Supply voltage
Voltage multiplier output
Voltage multiplier regulation input
Supply voltage of bias voltage generator
LCD intermediate bias voltages
Serial data input
Serial data output
Serial clock input
Slave address inputs
Oscillator signal input
External reset input
Test pads
FUNCTIONAL DESCRIPTION
Oscillator
I
2
C-bus interface controller
Input filters
Display Data RAM (DDRAM)
Timing generator
Address counter
Display address counter
Command decoder
Column driver outputs
Row driver outputs
Bias voltage generator
High voltage generator
Temperature compensation
Temperature sensor
LCD driver waveforms
DDRAM to display mapping
DDRAM addressing
7.18
7.18.1
7.18.2
7.18.3
7.18.4
7.18.5
7.18.6
7.18.7
8
8.1
8.1.1
8.1.2
8.1.3
8.1.4
8.1.5
8.1.6
8.1.7
8.1.8
8.1.9
8.1.10
8.2
9
10
11
12
13
13.1
13.2
13.3
13.4
13.5
13.6
14
15
16
17
18
19
20
21
I
2
C-bus interface
Bit transfer
START and STOP conditions
System configuration
Acknowledge
I
2
C-bus protocol
Command decoder
Display data byte
INSTRUCTIONS
PCF8820
Description of the bit functions
Power-down mode
Partial screen mode
Y-address of DDRAM
Bias system
High voltage generator configuration
Temperature read-out
V
LCD
control register
Grey-scale register and grey-scale level
Direct drive mode
Frame frequency calibration
Reset and initialization
LIMITING VALUES
HANDLING
DC CHARACTERISTICS
TIMING
APPLICATION INFORMATION
Programming example for the PCF8820
Examples of effects on the display
High voltage generator
Application for COG
Typical system configuration
External supply of V
LCDIN
BONDING PAD INFORMATION
DEVICE PROTECTION CIRCUITS
TRAY INFORMATION
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
BARE DIE DISCLAIMER
PURCHASE OF PHILIPS I
2
C COMPONENTS
2000 Dec 07
2
Philips Semiconductors
Product specification
67
×
101 Grey-scale/ECB colour dot matrix
LCD driver
1
FEATURES
PCF8820
•
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
×
101
×
2-bit with linear RAM
addressing
•
Partial screen mode with reduced current consumption
(8 rows at top or bottom of display)
•
On-chip:
– Generation of LCD supply voltage (V
LCDOUT
);
external supply also possible
– Configurable voltage multiplier factor of
8, 7, 6, 5, 4, 3 or 2; direct drive also possible
– Selectable linear temperature compensation
of V
LCDOUT
– Generation of intermediate LCD bias voltages
– Oscillator requires no external components; external
clock also possible.
•
Temperature read-out
•
Fast mode
I
2
C-bus
interface (400 kbits/s)
•
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
DD1
to V
SS1
)
•
High voltage generator supply voltage range from
2.7 to 5.5 V (V
DD2
to V
SS1
and V
DD3
to V
SS2
)
•
Bias voltage generator supply voltage range
(V
LCDIN
to V
SS1
):
– 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
multiplex rate of 1 : 8.
•
Low power consumption, suitable for battery operated
systems
•
Slim chip layout, suitable for chip-on-glass applications
4
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
NAME
PCF8820U
−
chip with bumps in tray
DESCRIPTION
VERSION
−
2
APPLICATIONS
•
Mobile telecommunication systems
•
Battery powered equipment
•
Point of sale terminals
•
Instrumentation
•
Automotive information systems.
3
GENERAL DESCRIPTION
•
Software selectable top and bottom row swap for
adapting driver to different glass-layouts
•
CMOS compatible inputs
•
Manufactured in silicon gate CMOS process.
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
2
C-bus).
All inputs are CMOS compatible.
Remark: the waveform generation for ECB colour is
identical to that used for grey-scale.
2000 Dec 07
3
Philips Semiconductors
Product specification
67
×
101 Grey-scale/ECB colour dot matrix
LCD driver
6
6.1
PINNING
Pad configuration
PAD
3 to 25
232 to 222
148 to 127
151 to 161
26 to 126
206 to 211
198 to 203
179 to 184
188 to 194
185 to 187
173 to 178
172
166 to 171
165
164
163
162
195 and 196
197
215 and 216
204
214
220
219
205
221
212
213
217
218
LCD row driver outputs (block 1)
LCD row driver outputs (block 2)
LCD row driver outputs (block 3)
LCD row driver outputs (block 4)
LCD column driver outputs
ground supply 1
ground supply 2
supply voltage 1 of logic
supply voltage 2 of high voltage generator; temperature read-out
supply voltage 3 of high voltage generator; temperature read-out
voltage multiplier output
voltage multiplier regulation input
supply voltage for LCD (bias voltage generator)
LCD intermediate bias voltage 2; for test purposes only
LCD intermediate bias voltage 3; for test purposes only
LCD intermediate bias voltage 4; for test purposes only
LCD intermediate bias voltage 5; for test purposes only
serial data input
serial data output (acknowledge)
serial clock input
I
2
C-bus slave address input 0 (bit 0)
I
2
C-bus slave address input 1 (bit 1)
oscillator signal input
external reset input (active LOW)
test 1 input
test 2 output
test 3 I/O
test 4 I/O
test 5 input
test 6 output
DESCRIPTION
PCF8820
SYMBOL
R0 to R22
R23 to R33
R34 to R55
R56 to R66
C0 to C100
V
SS1
V
SS2
V
DD1
V
DD2
V
DD3
V
LCDOUT
V
LCDSENSE
V
LCDIN
V
2
V
3
V
4
V
5
SDA_IN
SDA_OUT
SCL
SA0
SA1
OSC
RES
T1
T2
T3
T4
T5
T6
The pad configuration is shown in Fig.32.
2000 Dec 07
5
PCB Design
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