PCF2119SU/2/F2
LCD控制器/驱动器 LCD controllers/drivers
General description
The PCF2119x is a low power CMOS1 LCD controller and driver, designed to drive a dot matrix LCD display of 2-lines by 16 characters or 1-line by 32 characters with 5 ×8 dot format. All necessary functions for the display are provided in a single chip, including on-chip generation of LCD bias voltages, resulting in a minimum of external components and lower system current consumption.The PCF2119x interfaces to most
microcontrollers via a 4-bit or 8-bit bus or via the 2-wire I2C-bus. The chip contains a character generator and displays alphanumeric and kana Japanese characters.
Features and benefits
Single-chip LCD controller and driver
2-line display of up to 16 characters plus 160 icons or 1-line display of up to 32 characters plus 160 icons
5×7 character format plus cursor; 5×8 for kana Japanese and user defined symbols
Reduced current consumption while displaying icons only
Icon blink function
On-chip:
Configurable 4, 3, or 2 times voltage multiplier generating LCD supply voltage, independent of VDD, programmable by instruction external supply also possible
Temperature compensation of on-chip generated VLCDOUT: −0.16 %/K to −0.24 %/K programmable by instruction
Generation of intermediate LCD bias voltages
Oscillator requires no external components external clock also possible
Display Data RAM DDRAM: 80 characters
Character Generator ROM CGROM: 240 characters 5×8
Character Generator RAM CGRAM: 16 characters 5×8; 4 characters used to drive 160 icons, 8 characters used if icon blink feature is used in application
4-bit or 8-bit parallel bus and 2-wire I2C-bus interface
Manufactured insilicon gate CMOS process
18 row and 80 column outputs
Multiplex rates 1:18 2-line display or 1-line display, 1:9 for 1-line display of up to 16 characters and 80 icons and 1:2 for icon only mode
Uses common 11 code instruction set extended
Logic supply voltage: VDD1−VSS1= 1.5 V to 5.5 V chip may be driven with two battery cells
LCD supply voltage: VLCDOUT−VSS2= 2.2 V to 6.5 V
VLCDgenerator supply voltage: VDD2−VSS2= 2.2 V to 4 V and VDD3−VSS2=2.2Vto4V
Direct mode to save current consumption for icon mode and multiplex drive mode 1:9 depending on VDD2value and LCD liquid properties
Very low current consumption 20μA to 200μA:
Icon mode: < 25μA
Power-down mode: < 2μA
Icon mode is used to save current. When only icons are displayed, a much lower LCD operating voltage can be used and the switching frequency of the LCD outputs is reduced; in most applications it is possible to use VDDas LCD supply voltage
Applications
Telecom equipment
Portable instruments
Point-of-sale terminals
