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NXP Semiconductors Electronic Components Datasheet

PCF85162 Datasheet

Universal LCD driver

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PCF85162
Universal LCD driver for low multiplex rates
Rev. 3 — 16 June 2011
Product data sheet
1. General description
The PCF85162 is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD)1 with low multiplex rates. It generates the drive signals for any static or
multiplexed LCD containing up to four backplanes and up to 32 segments. It can be easily
cascaded for larger LCD applications. The PCF85162 is compatible with most
microcontrollers and communicates via the two-line bidirectional I2C-bus. Communication
overheads are minimized by a display RAM with auto-incremented addressing, by
hardware subaddressing, and by display memory switching (static and duplex drive
modes).
2. Features and benefits
Single chip LCD controller and driver
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
Selectable display bias configuration: static, 12, or 13
Internal LCD bias generation with voltage-follower buffers
32 segment drives:
Up to sixteen 7-segment numeric characters
Up to eight 14-segment alphanumeric characters
Any graphics of up to 128 elements
32 4-bit RAM for display data storage
Display memory bank switching in static and duplex drive modes
Versatile blinking modes
Independent supplies possible for LCD and logic voltages
Wide power supply range: from 1.8 V to 5.5 V
Wide logic LCD supply range:
From 2.5 V for low-threshold LCDs
Up to 6.5 V for guest-host LCDs and high-threshold twisted nematic LCDs
Low power consumption
400 kHz I2C-bus interface
No external components required
Manufactured in silicon gate CMOS process
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 17.


NXP Semiconductors Electronic Components Datasheet

PCF85162 Datasheet

Universal LCD driver

No Preview Available !

NXP Semiconductors
PCF85162
Universal LCD driver for low multiplex rates
3. Ordering information
Table 1. Ordering information
Type number Package
Name
Description
Version
PCF85162T/1
TSSOP48 plastic thin shrink small outline package; 48 leads; SOT362-1
body width 6.1 mm
4. Marking
Table 2. Marking codes
Type number
PCF85162T/1
Marking code
PCF85162T
5. Block diagram
VLCD
BP0 BP2 BP1 BP3
BACKPLANE
OUTPUTS
S0 to S31
32
DISPLAY SEGMENT OUTPUTS
VSS
CLK
SYNC
LCD BIAS
GENERATOR
LCD
VOLTAGE
SELECTOR
CLOCK SELECT
AND TIMING
BLINKER
TIMEBASE
OSC
VDD
SCL
SDA
OSCILLATOR
INPUT
FILTERS
POWER-ON
RESET
I2C-BUS
CONTROLLER
SA0
Fig 1. Block diagram of PCF85162
DISPLAY
CONTROLLER
DISPLAY REGISTER
OUTPUT BANK SELECT
AND BLINK CONTROL
PCF85162
DISPLAY
RAM
40 × 4-BIT
COMMAND
DECODER
WRITE DATA
CONTROL
DATA POINTER AND
AUTO INCREMENT
SUBADDRESS
COUNTER
A0 A1 A2
013aaa064
PCF85162
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 16 June 2011
© NXP B.V. 2011. All rights reserved.
2 of 46


Part Number PCF85162
Description Universal LCD driver
Maker NXP
Total Page 30 Pages
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