PCF85133 Datasheet PDF - NXP Semiconductors


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PCF85133
NXP Semiconductors

Part Number PCF85133
Description Universal LCD driver
Page 30 Pages

PCF85133 datasheet pdf
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PCF85133
Universal LCD driver for low multiplex rates
Rev. 1 — 17 February 2009
Product data sheet
1. General description
The PCF85133 is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD) with low multiplex rates. It generates the drive signals for any static or
multiplexed LCD containing up to four backplanes and up to 80 segments and can easily
be cascaded for larger LCD applications. The PCF85133 is compatible with most
microprocessors or microcontrollers and communicates via a two-line bidirectional
I2C-bus. Communication overheads are minimized by a display RAM with
auto-incremental addressing, by hardware subaddressing and by display memory
switching (static and duplex drive modes).
2. Features
I Single-chip LCD controller and driver
I Selectable backplane drive configuration: static or 2, 3 or 4 backplane multiplexing
I Selectable display bias configuration: static, 12 or 13
I Selectable frame frequency: 82 Hz or 110 Hz
I Internal LCD bias generation with voltage-follower buffers
I 80 segment drives:
N Up to 40 7-segment numeric characters
N Up to 21 14-segment alphanumeric characters
N Any graphics of up to 320 elements
I 80 × 4 bit RAM for display data storage
I Auto-incremental display data loading across device subaddress boundaries
I Display memory bank switching in static and duplex drive modes
I Versatile blinking modes
I Independent supplies possible for LCD and logic voltages
I Wide power supply range: from 1.8 V to 5.5 V
I Wide LCD supply range for low-threshold LCDs, for guest-host LCDs and
high-threshold (automobile) twisted nematic LCDs: from 2.5 V to 6.5 V
I Low power consumption
I 400 kHz I2C-bus interface
I May be cascaded for large LCD applications (up to 5120 elements possible)
I May be cascaded with PCF8532 to gain more flexibility in the number of addressable
segments
I No external components
I Compatible with Chip-On-Glass (COG) technology
I Manufactured using silicon gate CMOS process



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PCF85133
Universal LCD driver for low multiplex rates
3. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
PCF85133U/2DA/1 PCF85133 bare die; 110 bumps; 4.16 × 1.07 × 0.38 mm
Delivery form[1]
chip with bumps in tray
[1] Bump hardness see Table 20.
Version
PCF85133
4. Marking
Table 2. Marking codes
Type number
PCF85133U/2DA/1
Marking code
PC85133-1
5. Block diagram
VLCD
BP0 BP1 BP2 BP3
BACKPLANE
OUTPUTS
S0 to S79
80
DISPLAY SEGMENT OUTPUTS
LCD
VOLTAGE
SELECTOR
LCD BIAS
GENERATOR
VSS
CLK
SYNC
OSC
FF
SCL
SDA
CLOCK SELECT
AND TIMING
OSCILLATOR
INPUT
FILTERS
BLINKER
TIMEBASE
POWER-ON
RESET
I2C-BUS
CONTROLLER
DISPLAY
CONTROL
PCF85133
COMMAND
DECODE
DISPLAY REGISTER
OUTPUT BANK SELECT
AND BLINK CONTROL
DISPLAY
RAM
WRITE DATA
CONTROL
DATA POINTER AND
AUTO INCREMENT
SUBADDRESS
COUNTER
SA0 SDAACK
Fig 1. Block diagram of PCF85133
VDD
A0 A1 A2
001aaj583
PCF85133_1
Product data sheet
Rev. 1 — 17 February 2009
© NXP B.V. 2009. All rights reserved.
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6. Pinning information
6.1 Pinning
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PCF85133
Universal LCD driver for low multiplex rates
+y
0 +x
0
PCF85133
001aaj559
Top view. For mechanical details, see Figure 23.
Fig 2. Pinning of PCF85133
6.2 Pin description
Table 3. Pin description overview
Symbol
Pin Description
SDAACK
1 to 3
I2C-bus acknowledge output
SDA
4 to 6
I2C-bus serial data input
SCL
7 to 9
I2C-bus serial clock input
CLK 10 clock input/output
VDD
SYNC
11 to 13
14
supply voltage
cascade synchronization input/output
OSC
15 oscillator select
FF 16 frame frequency select
A0, A1 and A2
17 to 19
subaddress input
SA0 20 I2C-bus slave address input
VSS
VLCD
BP2, BP0, BP3 and BP1
21 to 23
ground supply voltage
24 to 26
LCD supply voltage
27, 28, 109 and 110 LCD backplane output
S0 to S79
29 to 108
LCD segment output
D1 to D9
- dummy pads
PCF85133_1
Product data sheet
Rev. 1 — 17 February 2009
© NXP B.V. 2009. All rights reserved.
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PCF85133
Universal LCD driver for low multiplex rates
7. Functional description
The PCF85133 is a versatile peripheral device designed to interface between any
microprocessor or microcontroller to a wide variety of LCDs. It can directly drive any static
or multiplexed LCD containing up to four backplanes and up to 80 segments.
The display configurations possible with the PCF85133 depend on the required number of
active backplane outputs. A selection of display configurations is shown in Table 4.
All of the display configurations can be implemented in a typical system as shown in
Figure 3.
Table 4. Possible display configurations
Number of
7-segment numeric
Backplanes Elements
Digits
Indicator
symbols
4 320 40 40
3 240 30 30
2 160 20 20
1 80
10 10
14-segment numeric
Characters Indicator
symbols
20 40
16 16
10 20
5 10
Dot matrix
320 (4 × 80)
240 (3 × 80)
160 (2 × 80)
80 (1 × 80)
VDD
R
tr
2Cb
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
SDAACK
SDA
SCL
OSC
FF
VDD VLCD
PCF85133
80 segment drives
LCD PANEL
4 backplanes
(up to 320
elements)
A0 A1 A2 SA0 VSS
VSS
001aaj582
Fig 3. Typical system configuration
The host microprocessor or microcontroller maintains the 2-line I2C-bus communication
channel with the PCF85133.
The internal oscillator is selected by connecting pin OSC to VSS. The only other
connections required to complete the system are the power supplies (VDD, VSS and VLCD)
and the LCD panel selected for the application.
PCF85133_1
Product data sheet
Rev. 1 — 17 February 2009
© NXP B.V. 2009. All rights reserved.
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