INTEGRATED CIRCUITS
DATA SHEET
PCF8812
65
×
102 pixels matrix LCD driver
Product specification
File under Integrated Circuits, IC12
2000 Nov 22
Philips Semiconductors
Product specification
65
×
102 pixels matrix LCD driver
CONTENTS
1
2
3
4
5
6
7
7.1
7.1.1
7.1.2
7.1.3
7.1.4
7.1.5
7.1.6
7.1.7
7.1.8
7.1.9
7.1.10
7.1.11
7.1.12
7.1.13
7.1.14
8
8.1
8.2
8.3
8.4
8.5
8.6
9
9.1
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING
PIN FUNCTIONS
Pin functions
ROW 0 to ROW 64 row driver outputs
COL 0 to COL 101 column driver outputs
V
SS1
and V
SS2
: negative power supply rails
V
DD1
to V
DD3
: positive power supply rails
V
LCDIN
: LCD power supply
V
LCDOUT
: LCD power supply
V
LCDSENSE
: voltage multiplier regulation input
(V
LCD
)
T1 to T5: test pads
SDIN: serial data line
SCLK: serial clock line
D/C: mode select
SCE: chip enable
OSC: oscillator
RES: reset
FUNCTIONAL DESCRIPTION
Oscillator
Address Counter (AC)
Display Data RAM (DDRAM)
Timing generator
Display address counter
LCD row and column drivers
ADDRESSING
Data structure
10
10.1
10.2
10.3
10.3.1
10.3.2
10.3.3
10.4
10.4.1
10.5
10.6
10.7
10.8
10.9
10.10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
INSTRUCTIONS
Initialization
Reset function
Function set
PD
V
H
Display control
D and E
Set Y address of RAM
Set X address of RAM
Set HV-generator stages
Bias system
Temperature control
Set V
OP
value
LIMITING VALUES
HANDLING
DC CHARACTERISTICS
AC CHARACTERISTICS
SERIAL INTERFACE
RESET
PCF8812
APPLICATION INFORMATION
CHIP INFORMATION
PAD INFORMATION
BONDING PAD LOCATION
DEVICE PROTECTION DIAGRAM
TRAY INFORMATION
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
2000 Nov 22
2
Philips Semiconductors
Product specification
65
×
102 pixels matrix LCD driver
1
FEATURES
2
APPLICATIONS
PCF8812
•
65 row and 102 column outputs
•
Display data RAM 65
×
102 bits
•
On-chip:
– Configurable 5 (4, 3 and 2) voltage multiplier
generating V
LCD
(external V
LCD
also possible)
– Generation of intermediate LCD bias voltages
– Oscillator requires no external components
(external clock also possible).
•
External reset input pin
•
Serial interface maximum 4.0 Mbit/s
•
CMOS compatible inputs
•
Mux rate: 1 : 65
•
Logic supply voltage range V
DD1
to V
SS
:
– 2.5 to 5.5 V.
•
High voltage generator supply voltage range
V
DD2
to V
SS
and V
DD3
to V
SS
– 2.5 to 4.5 V.
•
Display supply voltage range V
LCD
to V
SS
:
– 4.5 to 9.0 V.
•
Low power consumption, suitable for battery operated
systems
•
Temperature compensation of V
LCD
•
Temperature range: T
amb
=
−40
to +85
°C
•
Slim chip layout, suited for Chip-On-Glass (COG)
applications.
4
ORDERING INFORMATION
•
Telecom equipment.
3
GENERAL DESCRIPTION
The PCF8812 is a low power CMOS LCD controller driver,
designed to drive a graphic display of 65 rows and
102 columns. All necessary functions for the display are
provided in a single chip, including on-chip generation of
LCD supply and bias voltages, resulting in a minimum of
external components and low power consumption. The
PCF8812 interfaces to microcontrollers via a serial bus
interface.
PACKAGE
TYPE NUMBER
NAME
PCF8812U/2
Tray
chip with bumps in tray
DESCRIPTION
VERSION
−
2000 Nov 22
3
Philips Semiconductors
Product specification
65
×
102 pixels matrix LCD driver
5
BLOCK DIAGRAM
PCF8812
handbook, full pagewidth
VDD1
VDD2
VDD3
COL0 to COL101
102
COLUMN DRIVERS
ROW0 to ROW64
65
ROW DRIVERS
VLCDIN
BIAS
VOLTAGE
GENERATOR
DATA LATCHES
HIGH
VOLTAGE
GENERATOR
4 stages
SHIFT REGISTER
VLCDSENSE
VLCDOUT
VSS1
VSS2
T1
T2
T3
T4
T5
RESET
DISPLAY DATA RAM
(DDRAM)
65
×
102 bits
RES
OSCILLATOR
OSC
TIMING
GENERATOR
ADDRESS COUNTER
DISPLAY
ADDRESS
COUNTER
DATA
REGISTER
PCF8812
I/O BUFFER
MGT636
SDIN
SCLK
D/C
SCE
Fig.1 Block diagram.
2000 Nov 22
4
Philips Semiconductors
Product specification
65
×
102 pixels matrix LCD driver
6
PINNING
SYMBOL
RES
ROW 32 to
ROW 19
ROW 0 to
ROW 18
COL 0 to
COL 101
ROW 50 to
ROW 33
ROW 51 to
ROW 64
V
DD1
V
DD3
V
DD2
OSC
SDIN
D/C
SCE
T2
SCLK
V
SS2
V
SS1
T1
T5
T4
V
SS1
T3
V
LCDIN
V
LCDOUT
V
LCDSENSE
PAD
1
2 to 15
18 to 36
37 to 138
139 to 156
159 to 172
174 to 179
180
181 to 193
194
195
196
197
198
199
200 to 213
214 to 217
218
219
220
221 and 222
223
224 to 229
230 to 236
237
16, 17, 157,
158 and 173
DESCRIPTION
external reset input
(active LOW)
LCD row driver outputs
7.1.2
LCD row driver outputs
LCD column driver
outputs
LCD row driver outputs
LCD row driver outputs
supply voltage 1
supply voltage 3
supply voltage 2
oscillator input
serial data input
data/command input
chip enable input
(active LOW)
test 2 output
serial clock input
negative power supply 2
negative power supply 1
test 1 input
test 5 input
test 4 input
negative power supply 1
test 3 input/output
LCD supply voltage
voltage multiplier output
voltage multiplier
regulation input (V
LCD
)
dummy pads
7
7.1
7.1.1
PIN FUNCTIONS
Pin functions
PCF8812
ROW 0
TO
ROW 64
ROW DRIVER OUTPUTS
These pads output the row signals.
COL 0
TO
COL 101
COLUMN DRIVER OUTPUTS
These pads output the column signals.
7.1.3
V
SS1
AND
V
SS2
:
NEGATIVE POWER SUPPLY RAILS
The 2 supply rails V
SS1
and V
SS2
must be connected
together.
7.1.4
V
DD1
TO
V
DD3
:
POSITIVE POWER SUPPLY RAILS
V
DD2
and V
DD3
are the supply voltage for the internal
voltage generator. Both have the same voltage and may
be connected together outside of the chip. V
DD1
is used as
supply for the rest of the chip. V
DD1
can be connected
together with V
DD2
and V
DD3
but in this case care must be
taken to respect the supply voltage range
(see Chapter 13).
If the internal voltage generator is not used then V
DD2
and
V
DD3
must be connected to V
DD1
or connected to power.
7.1.5
V
LCDIN
: LCD
POWER SUPPLY
Positive power supply for the liquid crystal display.
An external LCD supply voltage can be supplied using the
V
LCDIN
pad. In this case V
LCDOUT
has to be left open-circuit
and the internal voltage generator has to be programmed
to zero. If the PCF8812 is in Power-down mode, the
external LCD supply voltage has to be switched off.
7.1.6
V
LCDOUT
: LCD
POWER SUPPLY
Positive power supply for the liquid crystal display. If the
internal voltage generator is used, the two supply rails
V
LCDIN
and V
LCDOUT
must be connected together. If an
external supply is used this pin must be left open-circuit.
7.1.7
V
LCDSENSE
:
VOLTAGE MULTIPLIER REGULATION
INPUT
(V
LCD
)
V
LCDSENSE
is the input of the internal voltage multiplier
regulation.
If the internal voltage generator is used then V
LCDSENSE
must be connected to V
LCDOUT
. If a external supply voltage
is used then the V
LCDSENSE
can be let open-circuit or
connected to ground.
2000 Nov 22
5
京公网安备 11010802033920号
EEWORLD
