PT16511 LCD Control/Driver IC DESCRIPTION The PT16511 is 1/4 duty general-purpose LCD driver that can be used for frequency display in electronic tuners under the control of a microcontroller. The PT16511 can drive an LCD with up to 140 segments directly. The PT16511 can also control up to 4 general-purpose output ports. APPLICATION • Electronic equipment with LCD Display FEATURES • Up to 140 segments for 1/4 duty drive can be displayed • Serial interface for clock, Data Input, Strobe pins • Serial data control of the power-saving mode based backup function and all the segments forced off function • Serial data control of switching between the segment output port and the general-purpose output port functions • Serial data control of frame frequency for common and segment output waveforms • High generality, since display data is displayed directly without decoder intervention • The INHB pin can force the display to the off state • RC oscillator circuit • Programmable PWM signal output pins BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT16511 APPLICATION CIRCUIT Notes: 1. * = When a capacitor except the recommended external capacitance (Cosc = 1000 pF) is connected the OSC pin, we recommend that applications connect the OSC pin with a capacitor in the range 220 to 2200pF. 2. The resistance value must be decide by the LCD panel size. V1.0 2 June 2012 PT16511 ORDER INFORMATION Valid Part Number PT16511-LQ Package Type 48-pin, LQFP Top Code PT16511-LQ PIN CONFIGURATION V1.0 3 June 2012 PT16511 PIN DESCRIPTION Pin Name I/O Active Handling when unused Function Open Segment outputs for displaying the display data transferred by serial data input. The pins SEG1/GP1/PW1 to SEG4/GP4 can be used as general-purpose output ports when so set up by the control data. SEG1/GP1/PW1 to SEG3/GP3/PW3 SEG4/GP4 O - SEG5 to SEG34 SEG35 COM1 to COM4 O - Open VDD - - - VLCD1 I - Open VLCD2 I - Open VSS - - - OSC I/O - VDD INHB I L GND CS I H CLK I SI I GND - Common driver outputs. The frame frequency is fO Hz. Logic block power supply. Provide a voltage in the range 4.5 to 6.0V. LCD drive 2/3 bias voltage (middle level) supply. It is possible to supply the 2/3 VDD voltage to this pin externally. LCD drive 1/3 bias voltage (middle level) supply. It is possible to supply the 1/3 VDD voltage to this pin externally. Ground pin. Connect to ground. Oscillator connection. An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. Display off control input • INHB = low (VSS)…off SEG1/ GP1/PW1 to SEG4/GP4 = low (VSS) (These pins are forcibly set to the segment output port function and fixed at the VSS level) SEG5 to SEG35 = low (VSS) COM1 to COM4 = low (VSS) • INHB = high (VDD)…on Note that serial data transfers can be performed when the display is forced off by this pin. Serial data transfer inputs. These pins are connected to the control microprocessor. CS: Chip enable CLK: Synchronization clock SI: Transfer data Pin No. 1 to 3 4 5 to 34 39 35 to 38 40 41 42 43 44 45 46 47 48 Note: NC=No connection Please don't connect the NC pins to any voltage potential or connect with other pins in PCB layout. V1.0 4 June 2012