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Part: PCF8801
Category:
Interface and Interconnect
Description: PCF8801; LCD Driver For 140 X 2 Segments
Company: Philips Semiconductors
Datasheet: Download PCF8801 datasheet File size : 933 kB
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Datasheet text preview:
INTEGRATED CIRCUITS
DATA SHEET
PCF8801 LCD driver for 140 × 2 segments
Product specification File under Integrated Circuits, IC12 2000 Feb 04
Philips Semiconductors
Product specification
LCD driver for 140 × 2 segments
FEATURES · Single-chip LCD controller/driver · Fixed backplane multiplexing at a rate of 1 : 2 · Internal LCD bias generation (0.5VDD) · 140 segment outputs configured to drive seven 40-segment characters · On-chip oscillator with one external resistor · Wide power supply range (2.7 V up to 5.5 V) · Low power consumption · Compatible with most microprocessors/microcontrollers · 1 MHz serial bus interface (280-bit shift register) · Easily cascaded for large LCD applications (two cascade directions possible) · Compatible with chip-on-glass technology · Manufactured by silicon gate CMOS process. GENERAL DESCRIPTION The PCF8801 is a peripheral device which interfaces a multiplexed Liquid Crystal Display (LCD) having two backplanes and up to 140 segments. It generates drive signals at a multiplex rate of 1 : 2 allowing seven 40-segment (5 x 8) characters to be driven. ORDERING INFORMATION TYPE NUMBER PCF8801U PACKAGE NAME - chip with bumps in tray DESCRIPTION
PCF8801
The chip can easily be cascaded for larger LCD applications, and the direction of the information flow in the cascade can be selected. The PCF8801 is compatible with most microprocessors/microcontrollers and communicates via a serial bus interface comprising a 280-bit shift register. The outputs are multiplexed by a clock signal generated by the internal oscillator which needs only one external resistor. Cascade applications only require the clock signal to be generated by the first device with the internal oscillators in the other devices disabled. The PCF8801 is designed for chip-on-glass applications. It has a narrow package with raised points (bumps) for easy assembly on to LCD glass.
VERSION -
2000 Feb 04
2
Philips Semiconductors
Product specification
LCD driver for 140 × 2 segments
BLOCK DIAGRAM
PCF8801
handbook, full pagewidth
LDPI LDNI DI1 DO1 DIR CLKI CLKO DO2 DI2 LCD BIAS GENERATOR IO1_1 OM1 SH1_1 280-BIT IO140_2 OM140 SH140_2 BI280-BIT ROUTING OUTPUT DIRECTIONAL OUTPUT BLOCK MULTIPLEXER SHIFT REGISTER REGISTER
LDPO LDNO
OUTPUT DRIVERS
S1 S140
÷2
OSCI OSCO INT_OSCO INTERNAL OSCILLATOR REXT FRAME GENERATOR
COMMON M
VMID COM1 BACKPLANE DRIVERS COM2
÷4
PCF8801
POWER-ON-RESET
RESET
MGL915
T1 T2 T3
VSS1 VSS3 VSS5 VSS2 VSS4
VDD1 VDD3 VDD5 VDD2 VDD4
Fig.1 Block diagram.
2000 Feb 04
3
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