PIC16LF1902-ESS 查看數據表（PDF） - Microchip Technology

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PIC16LF1902-ESS

28-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

Microchip Technology 

PIC16LF1902/3

18.0 LIQUID CRYSTAL DISPLAY

(LCD) DRIVER MODULE

The Liquid Crystal Display (LCD) driver module

generates the timing control to drive a static or

multiplexed LCD panel. In the PIC16LF1902/3 device,

the module drives the panels of up to four commons

and up to 72 total segments. The LCD module also

provides control of the LCD pixel data.

The LCD driver module supports:

• Direct driving of LCD panel

• Three LCD clock sources with selectable prescaler

• Up to four common pins:

- Static (1 common)

- 1/2 multiplex (2 commons)

- 1/3 multiplex (3 commons)

- 1/4 multiplex (4 commons)

• 19 Segment pins

• Static, 1/2 or 1/3 LCD Bias

Note:

COM3 and SEG15 share the same

physical pin on the PIC16LF1902/3,

therefore SEG15 is not available when

using 1/4 multiplex displays.

18.1 LCD Registers

The module contains the following registers:

• LCD Control register (LCDCON)

• LCD Phase register (LCDPS)

• LCD Reference Ladder register (LCDRL)

• LCD Contrast Control register (LCDCST)

• LCD Reference Voltage Control register

(LCDREF)

• Up to 3 LCD Segment Enable registers (LCDSEn)

• Up to 12 LCD data registers (LCDDATAn)

FIGURE 18-1:

LCD DRIVER MODULE BLOCK DIAGRAM

Data Bus

LCDDATAx

Registers

MUX

SEG<26:24, 15:0>(2)

To I/O Pads(1)

Timing Control

LCDCON

LCDPS

LCDSEn

COM<3:0>(3)

To I/O Pads(1)

FOSC/256

T1OSC

LFINTOSC

Clock Source

Select and

Prescaler

Note 1:

2:

These are not directly connected to the I/O pads, but may be tri-stated, depending on the configuration of

the LCD module.

COM3 and SEG15 share the same physical pin, therefore SEG15 is not available when using 1/4 multi-

plex displays.

 2011 Microchip Technology Inc.

Preliminary

DS41455A-page 143

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