描述 Description

The PCF21219 is a low power CMOS LCD controller and driver, designed to drive a dotmatrix LCD display of 2-lines by 16 characters or 1-line by 32 characters with 5 x 8 dotformat. All necessary functions for the display are provided in a single chip, includingon-chip generation of LCD bias voltages, resulting in a minimum of external componentsand lower system current consumption. The PCF21219 interfaces to mostmicrocontrollers via a 4-bit or 8-bit bus or via the 2-wire I2C-bus. The chip contains acharacter generator and displays alphanumeric and kana (Japanese) characters.
The last letter in the type name, for example PCF21219DUGR, characterizes the built-incharacter set. Various character sets can be manufactured on request. In addition 16 userdefined symbols (5 x 8 dot format) are available.

特性 Features

? Single-chip LCD controller and driver
? 2-line display of up to 16 characters plus 160 icons or 1-line display of up to32 characters plus 160 icons
? 5 x 7 character format plus cursor; 5 x 8 for kana (Japanese) and user definedsymbols
? Reduced current consumption while displaying icons only
? 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 x 8)
? Character Generator RAM (CGRAM): 16 characters (5 x 8); 4 characters used to drive160 icons
? 4-bit or 8-bit parallel bus and 2-wire I2C-bus interface
? Pin compatible with PCF2119
? Manufactured in silicon 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 to16 characters and 80 icons) and 1:2 (for icon only mode)
? Uses common 11 code instruction set (extended)
? Logic supply voltage: VDD1 - VSS1 = 2.5 V to 5.5 V (chip may be driven with twobattery cells)
? LCD supply voltage: VLCDOUT - VSS2 = 2.5 V to 6.5 V
? VLCD generator supply voltage: VDD2 - VSS2 = 2.5 V to 4 V andVDD3 - VSS2 = 2.5 V to 4 V
? Direct mode to save current consumption for icon mode and multiplex drive mode 1:9(depending on VDD2 value and LCD liquid properties)
? Very low current consumption
? Icon mode is used to save current. When only icons are displayed, a much lower LCDoperating voltage can be used and the switching frequency of the LCD outputs isreduced; in most applications it is possible to use VDD as LCD supply voltage

應用 Application

Telecom equipment


Portable instruments

Point-of-sale terminals