PCF2105

The PCF2105 integrated circuit is similar to the PCF2114x (described in the "PCF2116 family" data sheet) but does not contain the high voltage generator of that device. Furthermore, a fast I2C-bus interface (400 kHz) is provided.

The PCF2105 is optimized for chip-on-glass applications. A specific letter code 'M' for a character set is programmed in the Character Generator ROM (CGROM) (see Fig.5).

The PCF2105 is a low power CMOS LCD controller/driver, designed to drive a split screen dot matrix LCD of 1 or 2 lines by 24 characters or 2 or 4 lines by 12 characters with a 5 ´ 8 dot format. All necessary functions for the display are provided in a single chip, including on-chip generation of LCD bias voltages which results in a minimum of external components and lower system power consumption. To allow partial VDD shutdown the ESD protection system of PCF2105 of the SCL and SDA pads does not use a diode connected to VDD.

The chip contains a character generator and displays alphanumeric and kana characters. The PCF2105 interfaces to most microcontrollers via a 4 or 8-bit parallel bus, or via the 2-wire I2C-bus.